X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fusb%2Fhost%2Fehci-fsl.c;h=a43d37de0bc9ee507b5de5bcb2cc0bd882ca5d55;hb=79d867c2e683f7080a8724a54a4a12ac0ce1f837;hp=6e0043a50250e24df5763fa433f9740b4174ff71;hpb=6d8d4ef994a7c46e34b5fe53b1af7aa4f78192bf;p=u-boot diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 6e0043a502..a43d37de0b 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -1,34 +1,41 @@ /* - * (C) Copyright 2009 Freescale Semiconductor, Inc. + * (C) Copyright 2009, 2011 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 + * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include -#include +#include +#include +#include +#include #include "ehci.h" -#include "ehci-core.h" + +#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT +#define CONFIG_USB_MAX_CONTROLLER_COUNT 1 +#endif + +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 @@ -36,14 +43,45 @@ * * Excerpts from linux ehci fsl driver. */ -int ehci_hcd_init(void) +int ehci_hcd_init(int index, enum usb_init_type init, + struct ehci_hccr **hccr, struct ehci_hcor **hcor) { - struct usb_ehci *ehci; + 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); - 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))); + 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"); + return -EINVAL; + }; + + *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); @@ -52,13 +90,44 @@ int ehci_hcd_init(void) out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB); /* Init phy */ - if (!strcmp(getenv("usb_phy_type"), "utmi")) - out_le32(&(hcor->or_portsc[0]), PORT_PTS_UTMI); + if (hwconfig_sub(current_usb_controller, "phy_type")) + phy_type = hwconfig_subarg(current_usb_controller, + "phy_type", &len); else - out_le32(&(hcor->or_portsc[0]), PORT_PTS_ULPI); + 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 + } - /* Enable interface. */ - setbits_be32(&ehci->control, USB_EN); + if (!strncmp(phy_type, "utmi", 4)) { +#if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY) + clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, + PHY_CLK_SEL_UTMI); + clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, + UTMI_PHY_EN); + udelay(1000); /* delay required for PHY Clk to appear */ +#endif + out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI); + clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, + USB_EN); + } else { + clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, + PHY_CLK_SEL_ULPI); + clrsetbits_be32(&ehci->control, UTMI_PHY_EN | + CONTROL_REGISTER_W1C_MASK, 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); @@ -66,6 +135,19 @@ int ehci_hcd_init(void) in_le32(&ehci->usbmode); + if (has_erratum_a007798()) + set_txfifothresh(ehci, TXFIFOTHRESH); + + if (has_erratum_a004477()) { + /* + * When reset is issued while any ULPI transaction is ongoing + * then it may result to corruption of ULPI Function Control + * Register which eventually causes phy clock to enter low + * power mode which stops the clock. Thus delay is required + * before reset to let ongoing ULPI transaction complete. + */ + udelay(1); + } return 0; } @@ -73,7 +155,21 @@ int ehci_hcd_init(void) * Destroy the appropriate control structures corresponding * the the EHCI host controller. */ -int ehci_hcd_stop(void) +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); +}