mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-13 16:37:30 +00:00
047cea3655
when missing USB PHY clock, u-boot will hang during USB initialization when issuing "usb start". We should check USBGP[PHY_CLK_VALID] bit to avoid CPU hanging in this case. Due to controller issue of PHY_CLK_VALID in ULPI mode, we set USB_EN before checking PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work. Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com> Acked-by: Marek Vasut <marex@denx.de>
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* (C) Copyright 2009, 2011 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 <hwconfig.h>
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#include "ehci.h"
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/* Check USB PHY clock valid */
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static int usb_phy_clk_valid(struct usb_ehci *ehci)
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{
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if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
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in_be32(&ehci->prictrl))) {
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printf("USB PHY clock invalid!\n");
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return 0;
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} else {
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return 1;
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}
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}
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/*
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* Create the appropriate control structures to manage
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* a new EHCI host controller.
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*
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* Excerpts from linux ehci fsl driver.
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*/
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int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
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{
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struct usb_ehci *ehci;
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const char *phy_type = NULL;
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size_t len;
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#ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
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char usb_phy[5];
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usb_phy[0] = '\0';
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#endif
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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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/* Set to Host mode */
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setbits_le32(&ehci->usbmode, CM_HOST);
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out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
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out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
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/* Init phy */
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if (hwconfig_sub("usb1", "phy_type"))
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phy_type = hwconfig_subarg("usb1", "phy_type", &len);
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else
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phy_type = getenv("usb_phy_type");
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if (!phy_type) {
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#ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
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/* if none specified assume internal UTMI */
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strcpy(usb_phy, "utmi");
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phy_type = usb_phy;
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#else
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printf("WARNING: USB phy type not defined !!\n");
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return -1;
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#endif
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}
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if (!strcmp(phy_type, "utmi")) {
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#if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
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setbits_be32(&ehci->control, PHY_CLK_SEL_UTMI);
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setbits_be32(&ehci->control, UTMI_PHY_EN);
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udelay(1000); /* delay required for PHY Clk to appear */
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#endif
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out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
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setbits_be32(&ehci->control, USB_EN);
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} else {
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setbits_be32(&ehci->control, PHY_CLK_SEL_ULPI);
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clrsetbits_be32(&ehci->control, UTMI_PHY_EN, USB_EN);
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udelay(1000); /* delay required for PHY Clk to appear */
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if (!usb_phy_clk_valid(ehci))
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return -EINVAL;
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out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
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}
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out_be32(&ehci->prictrl, 0x0000000c);
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out_be32(&ehci->age_cnt_limit, 0x00000040);
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out_be32(&ehci->sictrl, 0x00000001);
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in_le32(&ehci->usbmode);
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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(int index)
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{
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return 0;
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}
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