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linux/drivers/usb/host/ehci-fsl.c
Benjamin Herrenschmidt 083522d766 USB: Implement support for EHCI with big endian MMIO 
This patch implements supports for EHCI controllers whose MMIO
registers are big endian and enables that functionality for
the Toshiba SCC chip. It does _not_ add support for big endian
in-memory data structures as this is not needed for that chip
and I hope it will never be.

The guts of the patch are to convert readl(...) to
ehci_readl(ehci, ...) and similarly for register writes.

Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-02-07 15:44:32 -08:00

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/*
* (C) Copyright David Brownell 2000-2002
* Copyright (c) 2005 MontaVista Software
*
* 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.
*/
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include "ehci-fsl.h"
/* FIXME: Power Managment is un-ported so temporarily disable it */
#undef CONFIG_PM
/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
/* 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.
*
*/
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;
unsigned int temp;
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", pdev->dev.bus_id);
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))) {
dev_err(&pdev->dev,
"Non Host Mode configured for %s. Wrong driver linked.\n",
pdev->dev.bus_id);
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",
pdev->dev.bus_id);
return -ENODEV;
}
irq = res->start;
hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
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",
pdev->dev.bus_id);
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;
}
/* Enable USB controller */
temp = in_be32(hcd->regs + 0x500);
out_be32(hcd->regs + 0x500, temp | 0x4);
/* Set to Host mode */
temp = in_le32(hcd->regs + 0x1a8);
out_le32(hcd->regs + 0x1a8, temp | 0x3);
retval = usb_add_hcd(hcd, irq, 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", pdev->dev.bus_id, retval);
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().
*
*/
void usb_hcd_fsl_remove(struct usb_hcd *hcd, struct platform_device *pdev)
{
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
static void mpc83xx_setup_phy(struct ehci_hcd *ehci,
enum fsl_usb2_phy_modes phy_mode,
unsigned int port_offset)
{
u32 portsc = 0;
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 mpc83xx_usb_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
struct fsl_usb2_platform_data *pdata;
void __iomem *non_ehci = hcd->regs;
pdata =
(struct fsl_usb2_platform_data *)hcd->self.controller->
platform_data;
/* Enable PHY interface in the control reg. */
out_be32(non_ehci + FSL_SOC_USB_CTRL, 0x00000004);
out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
if (pdata->operating_mode == FSL_USB2_DR_HOST)
mpc83xx_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)
mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
mpc83xx_setup_phy(ehci, pdata->phy_mode, 1);
}
/* put controller in host mode. */
ehci_writel(ehci, 0x00000003, non_ehci + FSL_SOC_USB_USBMODE);
out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
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)
{
mpc83xx_usb_setup(ehci_to_hcd(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;
/* 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);
retval = ehci_halt(ehci);
if (retval)
return retval;
/* data structure init */
retval = ehci_init(hcd);
if (retval)
return retval;
ehci->is_tdi_rh_tt = 1;
ehci->sbrn = 0x20;
ehci_reset(ehci);
retval = ehci_fsl_reinit(ehci);
return retval;
}
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_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_fsl_setup,
.start = ehci_run,
#ifdef CONFIG_PM
.suspend = ehci_bus_suspend,
.resume = ehci_bus_resume,
#endif
.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,
/*
* 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,
};
static int ehci_fsl_drv_probe(struct platform_device *pdev)
{
if (usb_disabled())
return -ENODEV;
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);
usb_hcd_fsl_remove(hcd, pdev);
return 0;
}
MODULE_ALIAS("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",
},
};
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