USB host: Adding USB ehci & ohci support for spear platform
This patch adds support for ehci and ohci controller in the SPEAr platform. Changes since V2: added clear_tt_buffer_complete in ehci_spear_hc_driver Signed-off-by: Deepak Sikri <deepak.sikri@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Deepak Sikri
Greg Kroah-Hartman
parent
ad78acafee
commit
c8c38de9d8
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@ -41,6 +41,7 @@ config USB_ARCH_HAS_OHCI
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default y if MFD_TC6393XB
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default y if ARCH_W90X900
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default y if ARCH_DAVINCI_DA8XX
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default y if PLAT_SPEAR
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# PPC:
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default y if STB03xxx
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default y if PPC_MPC52xx
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@ -67,6 +68,7 @@ config USB_ARCH_HAS_EHCI
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default y if ARCH_MXC
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default y if ARCH_OMAP3
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default y if ARCH_VT8500
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default y if PLAT_SPEAR
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default PCI
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# ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
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@ -1221,6 +1221,11 @@ MODULE_LICENSE ("GPL");
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#define PLATFORM_DRIVER vt8500_ehci_driver
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#endif
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#ifdef CONFIG_PLAT_SPEAR
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#include "ehci-spear.c"
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#define PLATFORM_DRIVER spear_ehci_hcd_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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@ -0,0 +1,212 @@
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/*
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* Driver for EHCI HCD on SPEAR SOC
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*
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* Copyright (C) 2010 ST Micro Electronics,
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* Deepak Sikri <deepak.sikri@st.com>
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*
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* Based on various ehci-*.c drivers
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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struct spear_ehci {
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struct ehci_hcd ehci;
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struct clk *clk;
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};
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#define to_spear_ehci(hcd) (struct spear_ehci *)hcd_to_ehci(hcd)
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static void spear_start_ehci(struct spear_ehci *ehci)
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{
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clk_enable(ehci->clk);
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}
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static void spear_stop_ehci(struct spear_ehci *ehci)
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{
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clk_disable(ehci->clk);
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}
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static int ehci_spear_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval = 0;
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/* registers start at offset 0x0 */
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ehci->caps = hcd->regs;
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ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
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&ehci->caps->hc_capbase));
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/* cache this readonly data; minimize chip reads */
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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retval = ehci_halt(ehci);
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if (retval)
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return retval;
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retval = ehci_init(hcd);
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if (retval)
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return retval;
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ehci_reset(ehci);
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ehci_port_power(ehci, 0);
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return retval;
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}
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static const struct hc_driver ehci_spear_hc_driver = {
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.description = hcd_name,
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.product_desc = "SPEAr EHCI",
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.hcd_priv_size = sizeof(struct spear_ehci),
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/* generic hardware linkage */
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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/* basic lifecycle operations */
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.reset = ehci_spear_setup,
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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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/* managing i/o requests and associated device resources */
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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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/* scheduling support */
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.get_frame_number = ehci_get_frame,
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/* root hub support */
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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 spear_ehci_hcd_drv_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd ;
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struct spear_ehci *ehci;
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struct resource *res;
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struct clk *usbh_clk;
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const struct hc_driver *driver = &ehci_spear_hc_driver;
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int *pdata = pdev->dev.platform_data;
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int irq, retval;
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char clk_name[20] = "usbh_clk";
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if (pdata == NULL)
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return -EFAULT;
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if (usb_disabled())
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return -ENODEV;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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retval = irq;
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goto fail_irq_get;
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}
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if (*pdata >= 0)
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sprintf(clk_name, "usbh.%01d_clk", *pdata);
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usbh_clk = clk_get(NULL, clk_name);
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if (IS_ERR(usbh_clk)) {
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dev_err(&pdev->dev, "Error getting interface clock\n");
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retval = PTR_ERR(usbh_clk);
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goto fail_get_usbh_clk;
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}
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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retval = -ENOMEM;
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goto fail_create_hcd;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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retval = -ENODEV;
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goto fail_request_resource;
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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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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
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driver->description)) {
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retval = -EBUSY;
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goto fail_request_resource;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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retval = -ENOMEM;
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goto fail_ioremap;
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}
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ehci = (struct spear_ehci *)hcd_to_ehci(hcd);
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ehci->clk = usbh_clk;
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spear_start_ehci(ehci);
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
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if (retval)
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goto fail_add_hcd;
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return retval;
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fail_add_hcd:
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spear_stop_ehci(ehci);
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iounmap(hcd->regs);
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fail_ioremap:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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fail_request_resource:
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usb_put_hcd(hcd);
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fail_create_hcd:
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clk_put(usbh_clk);
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fail_get_usbh_clk:
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fail_irq_get:
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dev_err(&pdev->dev, "init fail, %d\n", retval);
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return retval ;
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}
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static int spear_ehci_hcd_drv_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 spear_ehci *ehci_p = to_spear_ehci(hcd);
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if (!hcd)
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return 0;
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if (in_interrupt())
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BUG();
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usb_remove_hcd(hcd);
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if (ehci_p->clk)
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spear_stop_ehci(ehci_p);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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if (ehci_p->clk)
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clk_put(ehci_p->clk);
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return 0;
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}
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static struct platform_driver spear_ehci_hcd_driver = {
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.probe = spear_ehci_hcd_drv_probe,
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.remove = spear_ehci_hcd_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "spear-ehci",
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.bus = &platform_bus_type
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}
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};
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MODULE_ALIAS("platform:spear-ehci");
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@ -1081,6 +1081,11 @@ MODULE_LICENSE ("GPL");
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#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
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#endif
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#ifdef CONFIG_PLAT_SPEAR
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#include "ohci-spear.c"
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#define PLATFORM_DRIVER spear_ohci_hcd_driver
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#endif
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#ifdef CONFIG_PPC_PS3
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#include "ohci-ps3.c"
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#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
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@ -0,0 +1,240 @@
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/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* Copyright (C) 2010 ST Microelectronics.
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* Deepak Sikri<deepak.sikri@st.com>
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*
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* Based on various ohci-*.c drivers
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/signal.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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struct spear_ohci {
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struct ohci_hcd ohci;
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struct clk *clk;
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};
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#define to_spear_ohci(hcd) (struct spear_ohci *)hcd_to_ohci(hcd)
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static void spear_start_ohci(struct spear_ohci *ohci)
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{
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clk_enable(ohci->clk);
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}
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static void spear_stop_ohci(struct spear_ohci *ohci)
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{
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clk_disable(ohci->clk);
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}
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static int __devinit ohci_spear_start(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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int ret;
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ret = ohci_init(ohci);
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if (ret < 0)
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return ret;
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ohci->regs = hcd->regs;
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ret = ohci_run(ohci);
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if (ret < 0) {
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dev_err(hcd->self.controller, "can't start\n");
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ohci_stop(hcd);
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return ret;
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}
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create_debug_files(ohci);
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#ifdef DEBUG
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ohci_dump(ohci, 1);
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#endif
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return 0;
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}
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static const struct hc_driver ohci_spear_hc_driver = {
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.description = hcd_name,
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.product_desc = "SPEAr OHCI",
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.hcd_priv_size = sizeof(struct spear_ohci),
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/* generic hardware linkage */
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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/* basic lifecycle operations */
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.start = ohci_spear_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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/* managing i/o requests and associated device resources */
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/* scheduling support */
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.get_frame_number = ohci_get_frame,
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/* root hub support */
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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.start_port_reset = ohci_start_port_reset,
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};
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static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
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{
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const struct hc_driver *driver = &ohci_spear_hc_driver;
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struct usb_hcd *hcd = NULL;
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struct clk *usbh_clk;
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struct spear_ohci *ohci_p;
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struct resource *res;
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int retval, irq;
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int *pdata = pdev->dev.platform_data;
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char clk_name[20] = "usbh_clk";
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if (pdata == NULL)
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return -EFAULT;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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retval = irq;
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goto fail_irq_get;
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}
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if (*pdata >= 0)
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sprintf(clk_name, "usbh.%01d_clk", *pdata);
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usbh_clk = clk_get(NULL, clk_name);
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if (IS_ERR(usbh_clk)) {
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dev_err(&pdev->dev, "Error getting interface clock\n");
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retval = PTR_ERR(usbh_clk);
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goto fail_get_usbh_clk;
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}
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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retval = -ENOMEM;
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goto fail_create_hcd;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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retval = -ENODEV;
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goto fail_request_resource;
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}
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hcd->rsrc_start = pdev->resource[0].start;
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hcd->rsrc_len = resource_size(res);
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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dev_dbg(&pdev->dev, "request_mem_region failed\n");
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retval = -EBUSY;
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goto fail_request_resource;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs) {
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dev_dbg(&pdev->dev, "ioremap failed\n");
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retval = -ENOMEM;
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goto fail_ioremap;
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}
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ohci_p = (struct spear_ohci *)hcd_to_ohci(hcd);
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ohci_p->clk = usbh_clk;
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spear_start_ohci(ohci_p);
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ohci_hcd_init(hcd_to_ohci(hcd));
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retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), IRQF_DISABLED);
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if (retval == 0)
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return retval;
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spear_stop_ohci(ohci_p);
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iounmap(hcd->regs);
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fail_ioremap:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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fail_request_resource:
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usb_put_hcd(hcd);
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fail_create_hcd:
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clk_put(usbh_clk);
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fail_get_usbh_clk:
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fail_irq_get:
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dev_err(&pdev->dev, "init fail, %d\n", retval);
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return retval;
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}
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static int spear_ohci_hcd_drv_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 spear_ohci *ohci_p = to_spear_ohci(hcd);
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usb_remove_hcd(hcd);
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if (ohci_p->clk)
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spear_stop_ohci(ohci_p);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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if (ohci_p->clk)
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clk_put(ohci_p->clk);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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#if defined(CONFIG_PM)
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static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
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pm_message_t message)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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struct spear_ohci *ohci_p = to_spear_ohci(hcd);
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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spear_stop_ohci(ohci_p);
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ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
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return 0;
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}
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|
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static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
|
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{
|
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struct usb_hcd *hcd = platform_get_drvdata(dev);
|
||||
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
||||
struct spear_ohci *ohci_p = to_spear_ohci(hcd);
|
||||
|
||||
if (time_before(jiffies, ohci->next_statechange))
|
||||
msleep(5);
|
||||
ohci->next_statechange = jiffies;
|
||||
|
||||
spear_start_ohci(ohci_p);
|
||||
ohci_finish_controller_resume(hcd);
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Driver definition to register with the platform bus */
|
||||
static struct platform_driver spear_ohci_hcd_driver = {
|
||||
.probe = spear_ohci_hcd_drv_probe,
|
||||
.remove = spear_ohci_hcd_drv_remove,
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = spear_ohci_hcd_drv_suspend,
|
||||
.resume = spear_ohci_hcd_drv_resume,
|
||||
#endif
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "spear-ohci",
|
||||
},
|
||||
};
|
||||
|
||||
MODULE_ALIAS("platform:spear-ohci");
|
||||
Loading…
Reference in New Issue