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https://github.com/smaeul/u-boot.git
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29c6fbe047
Signed-off-by: Francesco Rendine <francesco.rendine@valueteam.com> Signed-off-by: Damien Dusha <d.dusha@gmail.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Coding style cleanup; slight file restructuring. Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Remy Bohmer <linux@bohmer.net>
160 lines
4.2 KiB
C
160 lines
4.2 KiB
C
/*
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* (C) Copyright 2010, Damien Dusha, <d.dusha@gmail.com>
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*
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* (C) Copyright 2009, Value Team S.p.A.
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* Francesco Rendine, <francesco.rendine@valueteam.com>
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*
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* (C) Copyright 2009 Freescale Semiconductor, Inc.
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*
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* (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
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*
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* Author: Tor Krill tor@excito.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <pci.h>
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#include <usb.h>
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#include <asm/io.h>
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#include <usb/ehci-fsl.h>
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#include "ehci.h"
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#include "ehci-core.h"
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static void fsl_setup_phy(volatile struct ehci_hcor *);
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static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci);
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static int reset_usb_controller(volatile struct usb_ehci *ehci);
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static void usb_platform_dr_init(volatile struct usb_ehci *ehci);
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/*
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* Initialize SOC FSL EHCI Controller
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*
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* This code is derived from EHCI FSL USB Linux driver for MPC5121
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*
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*/
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int ehci_hcd_init(void)
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{
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volatile struct usb_ehci *ehci;
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/* Hook the memory mapped registers for EHCI-Controller */
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ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
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hccr = (struct ehci_hccr *)((uint32_t)&(ehci->caplength));
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hcor = (struct ehci_hcor *)((uint32_t) hccr +
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HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
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/* configure interface for UTMI_WIDE */
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usb_platform_dr_init(ehci);
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/* Init Phy USB0 to UTMI+ */
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fsl_setup_phy(hcor);
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/* Set to host mode */
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fsl_platform_set_host_mode(ehci);
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/*
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* Setting the burst size seems to be required to prevent the
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* USB from hanging when communicating with certain USB Mass
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* storage devices. This was determined by analysing the
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* EHCI registers under Linux vs U-Boot and burstsize was the
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* major non-interrupt related difference between the two
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* implementations.
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*
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* Some USB sticks behave better than others. In particular,
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* the following USB stick is especially problematic:
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* 0930:6545 Toshiba Corp
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*
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* The burstsize is set here to match the Linux implementation.
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*/
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out_be32(&ehci->burstsize, FSL_EHCI_TXPBURST(8) |
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FSL_EHCI_RXPBURST(8));
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return 0;
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}
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/*
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* Destroy the appropriate control structures corresponding
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* the the EHCI host controller.
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*/
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int ehci_hcd_stop(void)
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{
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volatile struct usb_ehci *ehci;
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int exit_status = 0;
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if (hcor) {
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/* Unhook struct */
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hccr = NULL;
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hcor = NULL;
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/* Reset the USB controller */
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ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
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exit_status = reset_usb_controller(ehci);
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}
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return exit_status;
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}
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static int reset_usb_controller(volatile struct usb_ehci *ehci)
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{
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unsigned int i;
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/* Command a reset of the USB Controller */
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out_be32(&(ehci->usbcmd), EHCI_FSL_USBCMD_RST);
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/* Wait for the reset process to finish */
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for (i = 65535 ; i > 0 ; i--) {
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/*
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* The host will set this bit to zero once the
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* reset process is complete
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*/
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if ((in_be32(&(ehci->usbcmd)) & EHCI_FSL_USBCMD_RST) == 0)
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return 0;
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}
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/* Hub did not reset in time */
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return -1;
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}
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static void fsl_setup_phy(volatile struct ehci_hcor *hcor)
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{
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uint32_t portsc;
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portsc = ehci_readl(&hcor->or_portsc[0]);
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portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
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/* Enable the phy mode to UTMI Wide */
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portsc |= PORT_PTS_PTW;
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portsc |= PORT_PTS_UTMI;
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ehci_writel(&hcor->or_portsc[0], portsc);
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}
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static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci)
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{
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uint32_t temp;
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temp = in_le32(&ehci->usbmode);
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temp |= CM_HOST | ES_BE;
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out_le32(&ehci->usbmode, temp);
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}
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static void usb_platform_dr_init(volatile struct usb_ehci *ehci)
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{
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/* Configure interface for UTMI_WIDE */
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out_be32(&ehci->isiphyctrl, PHYCTRL_PHYE | PHYCTRL_PXE);
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out_be32(&ehci->usbgenctrl, GC_PPP | GC_PFP );
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}
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