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/*
* (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
*
* (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
*
* Author: Tor Krill tor@excito.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <pci.h>
#include <usb.h>
#include <asm/io.h>
#include <usb/ehci-fsl.h>
#include <hwconfig.h>
#include <asm/fsl_errata.h>
#include "ehci.h"
static void set_txfifothresh(struct usb_ehci *, u32);
/* Check USB PHY clock valid */
static int usb_phy_clk_valid(struct usb_ehci *ehci)
{
if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
in_be32(&ehci->prictrl))) {
printf("USB PHY clock invalid!\n");
return 0;
} else {
return 1;
}
}
/*
* Create the appropriate control structures to manage
* a new EHCI host controller.
*
* Excerpts from linux ehci fsl driver.
*/
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
struct usb_ehci *ehci = NULL;
const char *phy_type = NULL;
size_t len;
char current_usb_controller[5];
#ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
char usb_phy[5];
usb_phy[0] = '\0';
#endif
if (has_erratum_a007075()) {
/*
* A 5ms delay is needed after applying soft-reset to the
* controller to let external ULPI phy come out of reset.
* This delay needs to be added before re-initializing
* the controller after soft-resetting completes
*/
mdelay(5);
}
memset(current_usb_controller, '\0', 5);
snprintf(current_usb_controller, 4, "usb%d", index+1);
switch (index) {
case 0:
ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
break;
case 1:
ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
break;
default:
printf("ERROR: wrong controller index!!\n");
break;
};
*hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
*hcor = (struct ehci_hcor *)((uint32_t) *hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
/* Set to Host mode */
setbits_le32(&ehci->usbmode, CM_HOST);
out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
/* Init phy */
if (hwconfig_sub(current_usb_controller, "phy_type"))
phy_type = hwconfig_subarg(current_usb_controller,
"phy_type", &len);
else
phy_type = getenv("usb_phy_type");
if (!phy_type) {
#ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
/* if none specified assume internal UTMI */
strcpy(usb_phy, "utmi");
phy_type = usb_phy;
#else
printf("WARNING: USB phy type not defined !!\n");
return -1;
#endif
}
if (!strncmp(phy_type, "utmi", 4)) {
#if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
setbits_be32(&ehci->control, PHY_CLK_SEL_UTMI);
setbits_be32(&ehci->control, UTMI_PHY_EN);
udelay(1000); /* delay required for PHY Clk to appear */
#endif
out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
setbits_be32(&ehci->control, USB_EN);
} else {
setbits_be32(&ehci->control, PHY_CLK_SEL_ULPI);
clrsetbits_be32(&ehci->control, UTMI_PHY_EN, USB_EN);
udelay(1000); /* delay required for PHY Clk to appear */
if (!usb_phy_clk_valid(ehci))
return -EINVAL;
out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
}
out_be32(&ehci->prictrl, 0x0000000c);
out_be32(&ehci->age_cnt_limit, 0x00000040);
out_be32(&ehci->sictrl, 0x00000001);
in_le32(&ehci->usbmode);
if (SVR_SOC_VER(get_svr()) == SVR_T4240 &&
IS_SVR_REV(get_svr(), 2, 0))
set_txfifothresh(ehci, TXFIFOTHRESH);
return 0;
}
/*
* Destroy the appropriate control structures corresponding
* the the EHCI host controller.
*/
int ehci_hcd_stop(int index)
{
return 0;
}
/*
* Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
* to counter DDR latencies in writing data into Tx buffer.
* This prevents Tx buffer from getting underrun
*/
static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
{
u32 cmd;
cmd = ehci_readl(&ehci->txfilltuning);
cmd &= ~TXFIFO_THRESH_MASK;
cmd |= TXFIFO_THRESH(txfifo_thresh);
ehci_writel(&ehci->txfilltuning, cmd);
}
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