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/*
* (C) Copyright 2010, Damien Dusha, <d.dusha@gmail.com>
*
* (C) Copyright 2009, Value Team S.p.A.
* Francesco Rendine, <francesco.rendine@valueteam.com>
*
* (C) Copyright 2009 Freescale Semiconductor, Inc.
*
* (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
*
* Author: Tor Krill tor@excito.com
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <pci.h>
#include <usb.h>
#include <asm/io.h>
#include <usb/ehci-fsl.h>
#include "ehci.h"
static void fsl_setup_phy(volatile struct ehci_hcor *);
static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci);
static int reset_usb_controller(volatile struct usb_ehci *ehci);
static void usb_platform_dr_init(volatile struct usb_ehci *ehci);
/*
* Initialize SOC FSL EHCI Controller
*
* This code is derived from EHCI FSL USB Linux driver for MPC5121
*
*/
int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
volatile struct usb_ehci *ehci;
/* Hook the memory mapped registers for EHCI-Controller */
ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
*hccr = (struct ehci_hccr *)((uint32_t)&(ehci->caplength));
*hcor = (struct ehci_hcor *)((uint32_t) *hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
/* configure interface for UTMI_WIDE */
usb_platform_dr_init(ehci);
/* Init Phy USB0 to UTMI+ */
fsl_setup_phy(*hcor);
/* Set to host mode */
fsl_platform_set_host_mode(ehci);
/*
* Setting the burst size seems to be required to prevent the
* USB from hanging when communicating with certain USB Mass
* storage devices. This was determined by analysing the
* EHCI registers under Linux vs U-Boot and burstsize was the
* major non-interrupt related difference between the two
* implementations.
*
* Some USB sticks behave better than others. In particular,
* the following USB stick is especially problematic:
* 0930:6545 Toshiba Corp
*
* The burstsize is set here to match the Linux implementation.
*/
out_be32(&ehci->burstsize, FSL_EHCI_TXPBURST(8) |
FSL_EHCI_RXPBURST(8));
return 0;
}
/*
* Destroy the appropriate control structures corresponding
* the the EHCI host controller.
*/
int ehci_hcd_stop(int index)
{
volatile struct usb_ehci *ehci;
int exit_status = 0;
/* Reset the USB controller */
ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
exit_status = reset_usb_controller(ehci);
return exit_status;
}
static int reset_usb_controller(volatile struct usb_ehci *ehci)
{
unsigned int i;
/* Command a reset of the USB Controller */
out_be32(&(ehci->usbcmd), EHCI_FSL_USBCMD_RST);
/* Wait for the reset process to finish */
for (i = 65535 ; i > 0 ; i--) {
/*
* The host will set this bit to zero once the
* reset process is complete
*/
if ((in_be32(&(ehci->usbcmd)) & EHCI_FSL_USBCMD_RST) == 0)
return 0;
}
/* Hub did not reset in time */
return -1;
}
static void fsl_setup_phy(volatile struct ehci_hcor *hcor)
{
uint32_t portsc;
portsc = ehci_readl(&hcor->or_portsc[0]);
portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
/* Enable the phy mode to UTMI Wide */
portsc |= PORT_PTS_PTW;
portsc |= PORT_PTS_UTMI;
ehci_writel(&hcor->or_portsc[0], portsc);
}
static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci)
{
uint32_t temp;
temp = in_le32(&ehci->usbmode);
temp |= CM_HOST | ES_BE;
out_le32(&ehci->usbmode, temp);
}
static void usb_platform_dr_init(volatile struct usb_ehci *ehci)
{
/* Configure interface for UTMI_WIDE */
out_be32(&ehci->isiphyctrl, PHYCTRL_PHYE | PHYCTRL_PXE);
out_be32(&ehci->usbgenctrl, GC_PPP | GC_PFP );
}
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