mirror of https://gitee.com/openkylin/linux.git
usb: host: mips: sead3: USB Host controller support for SEAD-3 platform.
Add EHCI driver for MIPS SEAD-3 development platform. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Steven J. Hill <sjhill@mips.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steven J. Hill
Greg Kroah-Hartman
parent
1f6155f5fa
commit
c256667f04
|
|
@ -110,13 +110,14 @@ config USB_EHCI_BIG_ENDIAN_MMIO
|
|||
depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || \
|
||||
ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
|
||||
PPC_MPC512x || CPU_CAVIUM_OCTEON || \
|
||||
PMC_MSP || SPARC_LEON)
|
||||
PMC_MSP || SPARC_LEON || MIPS_SEAD3)
|
||||
default y
|
||||
|
||||
config USB_EHCI_BIG_ENDIAN_DESC
|
||||
bool
|
||||
depends on USB_EHCI_HCD && (440EPX || ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
|
||||
PPC_MPC512x || PMC_MSP || SPARC_LEON)
|
||||
PPC_MPC512x || PMC_MSP || SPARC_LEON || \
|
||||
MIPS_SEAD3)
|
||||
default y
|
||||
|
||||
config XPS_USB_HCD_XILINX
|
||||
|
|
|
|||
|
|
@ -1364,6 +1364,11 @@ MODULE_LICENSE ("GPL");
|
|||
#define PLATFORM_DRIVER ehci_ls1x_driver
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_MIPS_SEAD3
|
||||
#include "ehci-sead3.c"
|
||||
#define PLATFORM_DRIVER ehci_hcd_sead3_driver
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_USB_EHCI_HCD_PLATFORM
|
||||
#include "ehci-platform.c"
|
||||
#define PLATFORM_DRIVER ehci_platform_driver
|
||||
|
|
|
|||
|
|
@ -0,0 +1,266 @@
|
|||
/*
|
||||
* MIPS CI13320A EHCI Host Controller driver
|
||||
* Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
|
||||
*
|
||||
* Copyright (C) 2012 MIPS Technologies, Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
static int ehci_sead3_setup(struct usb_hcd *hcd)
|
||||
{
|
||||
int ret;
|
||||
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
||||
|
||||
ehci->caps = hcd->regs + 0x100;
|
||||
|
||||
ret = ehci_setup(hcd);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ehci->need_io_watchdog = 0;
|
||||
|
||||
#ifdef __BIG_ENDIAN
|
||||
ehci->big_endian_mmio = 1;
|
||||
ehci->big_endian_desc = 1;
|
||||
#endif
|
||||
|
||||
/* Set burst length to 16 words. */
|
||||
ehci_writel(ehci, 0x1010, &ehci->regs->reserved[1]);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
const struct hc_driver ehci_sead3_hc_driver = {
|
||||
.description = hcd_name,
|
||||
.product_desc = "SEAD-3 EHCI",
|
||||
.hcd_priv_size = sizeof(struct ehci_hcd),
|
||||
|
||||
/*
|
||||
* generic hardware linkage
|
||||
*/
|
||||
.irq = ehci_irq,
|
||||
.flags = HCD_MEMORY | HCD_USB2,
|
||||
|
||||
/*
|
||||
* basic lifecycle operations
|
||||
*
|
||||
*/
|
||||
.reset = ehci_sead3_setup,
|
||||
.start = ehci_run,
|
||||
.stop = ehci_stop,
|
||||
.shutdown = ehci_shutdown,
|
||||
|
||||
/*
|
||||
* managing i/o requests and associated device resources
|
||||
*/
|
||||
.urb_enqueue = ehci_urb_enqueue,
|
||||
.urb_dequeue = ehci_urb_dequeue,
|
||||
.endpoint_disable = ehci_endpoint_disable,
|
||||
.endpoint_reset = ehci_endpoint_reset,
|
||||
|
||||
/*
|
||||
* scheduling support
|
||||
*/
|
||||
.get_frame_number = ehci_get_frame,
|
||||
|
||||
/*
|
||||
* root hub support
|
||||
*/
|
||||
.hub_status_data = ehci_hub_status_data,
|
||||
.hub_control = ehci_hub_control,
|
||||
.bus_suspend = ehci_bus_suspend,
|
||||
.bus_resume = ehci_bus_resume,
|
||||
.relinquish_port = ehci_relinquish_port,
|
||||
.port_handed_over = ehci_port_handed_over,
|
||||
|
||||
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
||||
};
|
||||
|
||||
static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd;
|
||||
struct resource *res;
|
||||
int ret;
|
||||
|
||||
if (usb_disabled())
|
||||
return -ENODEV;
|
||||
|
||||
if (pdev->resource[1].flags != IORESOURCE_IRQ) {
|
||||
pr_debug("resource[1] is not IORESOURCE_IRQ");
|
||||
return -ENOMEM;
|
||||
}
|
||||
hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
|
||||
if (!hcd)
|
||||
return -ENOMEM;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
hcd->rsrc_start = res->start;
|
||||
hcd->rsrc_len = resource_size(res);
|
||||
|
||||
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
||||
pr_debug("request_mem_region failed");
|
||||
ret = -EBUSY;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
||||
if (!hcd->regs) {
|
||||
pr_debug("ioremap failed");
|
||||
ret = -ENOMEM;
|
||||
goto err2;
|
||||
}
|
||||
|
||||
/* Root hub has integrated TT. */
|
||||
hcd->has_tt = 1;
|
||||
|
||||
ret = usb_add_hcd(hcd, pdev->resource[1].start,
|
||||
IRQF_SHARED);
|
||||
if (ret == 0) {
|
||||
platform_set_drvdata(pdev, hcd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
iounmap(hcd->regs);
|
||||
err2:
|
||||
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||||
err1:
|
||||
usb_put_hcd(hcd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
||||
|
||||
usb_remove_hcd(hcd);
|
||||
iounmap(hcd->regs);
|
||||
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||||
usb_put_hcd(hcd);
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int ehci_hcd_sead3_drv_suspend(struct device *dev)
|
||||
{
|
||||
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
||||
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
||||
unsigned long flags;
|
||||
int rc = 0;
|
||||
|
||||
if (time_before(jiffies, ehci->next_statechange))
|
||||
msleep(20);
|
||||
|
||||
/* Root hub was already suspended. Disable irq emission and
|
||||
* mark HW unaccessible. The PM and USB cores make sure that
|
||||
* the root hub is either suspended or stopped.
|
||||
*/
|
||||
ehci_prepare_ports_for_controller_suspend(ehci, device_may_wakeup(dev));
|
||||
spin_lock_irqsave(&ehci->lock, flags);
|
||||
ehci_writel(ehci, 0, &ehci->regs->intr_enable);
|
||||
(void)ehci_readl(ehci, &ehci->regs->intr_enable);
|
||||
|
||||
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
||||
spin_unlock_irqrestore(&ehci->lock, flags);
|
||||
|
||||
/* could save FLADJ in case of Vaux power loss
|
||||
* ... we'd only use it to handle clock skew
|
||||
*/
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int ehci_hcd_sead3_drv_resume(struct device *dev)
|
||||
{
|
||||
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
||||
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
||||
|
||||
/* maybe restore FLADJ. */
|
||||
|
||||
if (time_before(jiffies, ehci->next_statechange))
|
||||
msleep(100);
|
||||
|
||||
/* Mark hardware accessible again as we are out of D3 state by now */
|
||||
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
||||
|
||||
/* If CF is still set, we maintained PCI Vaux power.
|
||||
* Just undo the effect of ehci_pci_suspend().
|
||||
*/
|
||||
if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
|
||||
int mask = INTR_MASK;
|
||||
|
||||
ehci_prepare_ports_for_controller_resume(ehci);
|
||||
if (!hcd->self.root_hub->do_remote_wakeup)
|
||||
mask &= ~STS_PCD;
|
||||
ehci_writel(ehci, mask, &ehci->regs->intr_enable);
|
||||
ehci_readl(ehci, &ehci->regs->intr_enable);
|
||||
return 0;
|
||||
}
|
||||
|
||||
ehci_dbg(ehci, "lost power, restarting\n");
|
||||
usb_root_hub_lost_power(hcd->self.root_hub);
|
||||
|
||||
/* Else reset, to cope with power loss or flush-to-storage
|
||||
* style "resume" having let BIOS kick in during reboot.
|
||||
*/
|
||||
(void) ehci_halt(ehci);
|
||||
(void) ehci_reset(ehci);
|
||||
|
||||
/* emptying the schedule aborts any urbs */
|
||||
spin_lock_irq(&ehci->lock);
|
||||
if (ehci->reclaim)
|
||||
end_unlink_async(ehci);
|
||||
ehci_work(ehci);
|
||||
spin_unlock_irq(&ehci->lock);
|
||||
|
||||
ehci_writel(ehci, ehci->command, &ehci->regs->command);
|
||||
ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
|
||||
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
|
||||
|
||||
/* here we "know" root ports should always stay powered */
|
||||
ehci_port_power(ehci, 1);
|
||||
|
||||
ehci->rh_state = EHCI_RH_SUSPENDED;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops sead3_ehci_pmops = {
|
||||
.suspend = ehci_hcd_sead3_drv_suspend,
|
||||
.resume = ehci_hcd_sead3_drv_resume,
|
||||
};
|
||||
|
||||
#define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
|
||||
|
||||
#else
|
||||
#define SEAD3_EHCI_PMOPS NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver ehci_hcd_sead3_driver = {
|
||||
.probe = ehci_hcd_sead3_drv_probe,
|
||||
.remove = ehci_hcd_sead3_drv_remove,
|
||||
.shutdown = usb_hcd_platform_shutdown,
|
||||
.driver = {
|
||||
.name = "sead3-ehci",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = SEAD3_EHCI_PMOPS,
|
||||
}
|
||||
};
|
||||
|
||||
MODULE_ALIAS("platform:sead3-ehci");
|
||||
Loading…
Reference in New Issue