- 根目录:
- drivers
- usb
- host
- ehci-fsl.c
/*
* Copyright 2005-2009 MontaVista Software, Inc.
* Copyright 2008 Freescale Semiconductor, 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.
*
* Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
* by Hunter Wu.
* Power Management support by Dave Liu <daveliu@freescale.com>,
* Jerry Huang <Chang-Ming.Huang@freescale.com> and
* Anton Vorontsov <avorontsov@ru.mvista.com>.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include "ehci-fsl.h"
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
/**
* usb_hcd_fsl_probe - initialize FSL-based HCDs
* @drvier: Driver to be used for this HCD
* @pdev: USB Host Controller being probed
* Context: !in_interrupt()
*
* Allocates basic resources for this USB host controller.
*
*/
static int usb_hcd_fsl_probe(const struct hc_driver *driver,
struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata;
struct usb_hcd *hcd;
struct resource *res;
int irq;
int retval;
pr_debug("initializing FSL-SOC USB Controller\n");
/* Need platform data for setup */
pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev,
"No platform data for %s.\n", dev_name(&pdev->dev));
return -ENODEV;
}
/*
* This is a host mode driver, verify that we're supposed to be
* in host mode.
*/
if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
(pdata->operating_mode == FSL_USB2_MPH_HOST) ||
(pdata->operating_mode == FSL_USB2_DR_OTG))) {
dev_err(&pdev->dev,
"Non Host Mode configured for %s. Wrong driver linked.\n",
dev_name(&pdev->dev));
return -ENODEV;
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(&pdev->dev,
"Found HC with no IRQ. Check %s setup!\n",
dev_name(&pdev->dev));
return -ENODEV;
}
irq = res->start;
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto err1;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev,
"Found HC with no register addr. Check %s setup!\n",
dev_name(&pdev->dev));
retval = -ENODEV;
goto err2;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = res->end - res->start + 1;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
driver->description)) {
dev_dbg(&pdev->dev, "controller already in use\n");
retval = -EBUSY;
goto err2;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (hcd->regs == NULL) {
dev_dbg(&pdev->dev, "error mapping memory\n");
retval = -EFAULT;
goto err3;
}
pdata->regs = hcd->regs;
/*
* do platform specific init: check the clock, grab/config pins, etc.
*/
if (pdata->init && pdata->init(pdev)) {
retval = -ENODEV;
goto err3;
}
/* Enable USB controller, 83xx or 8536 */
if (pdata->have_sysif_regs)
setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
/* Don't need to set host mode here. It will be done by tdi_reset() */
retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
if (retval != 0)
goto err4;
return retval;
err4:
iounmap(hcd->regs);
err3:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
usb_put_hcd(hcd);
err1:
dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
if (pdata->exit)
pdata->exit(pdev);
return retval;
}
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
/**
* usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
* @dev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_hcd_fsl_probe().
*
*/
static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
usb_remove_hcd(hcd);
/*
* do platform specific un-initialization:
* release iomux pins, disable clock, etc.
*/
if (pdata->exit)
pdata->exit(pdev);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
static void ehci_fsl_setup_phy(struct ehci_hcd *ehci,
enum fsl_usb2_phy_modes phy_mode,
unsigned int port_offset)
{
u32 portsc;
portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
switch (phy_mode) {
case FSL_USB2_PHY_ULPI:
portsc |= PORT_PTS_ULPI;
break;
case FSL_USB2_PHY_SERIAL:
portsc |= PORT_PTS_SERIAL;
break;
case FSL_USB2_PHY_UTMI_WIDE:
portsc |= PORT_PTS_PTW;
/* fall through */
case FSL_USB2_PHY_UTMI:
portsc |= PORT_PTS_UTMI;
break;
case FSL_USB2_PHY_NONE:
break;
}
ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
}
static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
{
struct usb_hcd *hcd = ehci_to_hcd(ehci);
struct fsl_usb2_platform_data *pdata;
void __iomem *non_ehci = hcd->regs;
u32 temp;
pdata = hcd->self.controller->platform_data;
/* Enable PHY interface in the control reg. */
if (pdata->have_sysif_regs) {
temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
}
#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
/*
* Turn on cache snooping hardware, since some PowerPC platforms
* wholly rely on hardware to deal with cache coherent
*/
/* Setup Snooping for all the 4GB space */
/* SNOOP1 starts from 0x0, size 2G */
out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
/* SNOOP2 starts from 0x80000000, size 2G */
out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
#endif
if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
(pdata->operating_mode == FSL_USB2_DR_OTG))
ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
unsigned int chip, rev, svr;
svr = mfspr(SPRN_SVR);
chip = svr >> 16;
rev = (svr >> 4) & 0xf;
/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
ehci->has_fsl_port_bug = 1;
if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1);
}
if (pdata->have_sysif_regs) {
#ifdef CONFIG_PPC_85xx
out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
#else
out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
#endif
out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
}
}
/* called after powerup, by probe or system-pm "wakeup" */
static int ehci_fsl_reinit(struct ehci_hcd *ehci)
{
ehci_fsl_usb_setup(ehci);
ehci_port_power(ehci, 0);
return 0;
}
/* called during probe() after chip reset completes */
static int ehci_fsl_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int retval;
struct fsl_usb2_platform_data *pdata;
pdata = hcd->self.controller->platform_data;
ehci->big_endian_desc = pdata->big_endian_desc;
ehci->big_endian_mmio = pdata->big_endian_mmio;
/* EHCI registers start at offset 0x100 */
ehci->caps = hcd->regs + 0x100;
ehci->regs = hcd->regs + 0x100 +
HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
dbg_hcs_params(ehci, "reset");
dbg_hcc_params(ehci, "reset");
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
hcd->has_tt = 1;
retval = ehci_halt(ehci);
if (retval)
return retval;
/* data structure init */
retval = ehci_init(hcd);
if (retval)
return retval;
ehci->sbrn = 0x20;
ehci_reset(ehci);
retval = ehci_fsl_reinit(ehci);
return retval;
}
struct ehci_fsl {
struct ehci_hcd ehci;
#ifdef CONFIG_PM
/* Saved USB PHY settings, need to restore after deep sleep. */
u32 usb_ctrl;
#endif
};
#ifdef CONFIG_PM
static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
return container_of(ehci, struct ehci_fsl, ehci);
}
static int ehci_fsl_drv_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
void __iomem *non_ehci = hcd->regs;
ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
device_may_wakeup(dev));
if (!fsl_deep_sleep())
return 0;
ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
return 0;
}
static int ehci_fsl_drv_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
void __iomem *non_ehci = hcd->regs;
ehci_prepare_ports_for_controller_resume(ehci);
if (!fsl_deep_sleep())
return 0;
usb_root_hub_lost_power(hcd->self.root_hub);
/* Restore USB PHY settings and enable the controller. */
out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
ehci_reset(ehci);
ehci_fsl_reinit(ehci);
return 0;
}
static int ehci_fsl_drv_restore(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
usb_root_hub_lost_power(hcd->self.root_hub);
return 0;
}
static struct dev_pm_ops ehci_fsl_pm_ops = {
.suspend = ehci_fsl_drv_suspend,
.resume = ehci_fsl_drv_resume,
.restore = ehci_fsl_drv_restore,
};
#define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops)
#else
#define EHCI_FSL_PM_OPS NULL
#endif /* CONFIG_PM */
static const struct hc_driver ehci_fsl_hc_driver = {
.description = hcd_name,
.product_desc = "Freescale On-Chip EHCI Host Controller",
.hcd_priv_size = sizeof(struct ehci_fsl),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_USB2 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.reset = ehci_fsl_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_fsl_drv_probe(struct platform_device *pdev)
{
if (usb_disabled())
return -ENODEV;
/* FIXME we only want one one probe() not two */
return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
}
static int ehci_fsl_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
/* FIXME we only want one one remove() not two */
usb_hcd_fsl_remove(hcd, pdev);
return 0;
}
MODULE_ALIAS("platform:fsl-ehci");
static struct platform_driver ehci_fsl_driver = {
.probe = ehci_fsl_drv_probe,
.remove = ehci_fsl_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "fsl-ehci",
.pm = EHCI_FSL_PM_OPS,
},
};