u-boot/drivers/usb/host/ehci-fsl.c
Simon Glass 00caae6d47 env: Rename getenv/_f() to env_get()
We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.

Suggested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-16 08:30:24 -04:00

297 lines
7.4 KiB
C

/*
* (C) Copyright 2009, 2011, 2016 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-ci.h>
#include <hwconfig.h>
#include <fsl_usb.h>
#include <fdt_support.h>
#include <dm.h>
#include "ehci.h"
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
#define CONFIG_USB_MAX_CONTROLLER_COUNT 1
#endif
#ifdef CONFIG_DM_USB
struct ehci_fsl_priv {
struct ehci_ctrl ehci;
fdt_addr_t hcd_base;
char *phy_type;
};
#endif
static void set_txfifothresh(struct usb_ehci *, u32);
#ifdef CONFIG_DM_USB
static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci,
struct ehci_hccr *hccr, struct ehci_hcor *hcor);
#else
static int ehci_fsl_init(int index, struct usb_ehci *ehci,
struct ehci_hccr *hccr, struct ehci_hcor *hcor);
#endif
/* 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;
}
}
#ifdef CONFIG_DM_USB
static int ehci_fsl_ofdata_to_platdata(struct udevice *dev)
{
struct ehci_fsl_priv *priv = dev_get_priv(dev);
const void *prop;
prop = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy_type",
NULL);
if (prop) {
priv->phy_type = (char *)prop;
debug("phy_type %s\n", priv->phy_type);
}
return 0;
}
static int ehci_fsl_init_after_reset(struct ehci_ctrl *ctrl)
{
struct usb_ehci *ehci = NULL;
struct ehci_fsl_priv *priv = container_of(ctrl, struct ehci_fsl_priv,
ehci);
ehci = (struct usb_ehci *)priv->hcd_base;
if (ehci_fsl_init(priv, ehci, priv->ehci.hccr, priv->ehci.hcor) < 0)
return -ENXIO;
return 0;
}
static const struct ehci_ops fsl_ehci_ops = {
.init_after_reset = ehci_fsl_init_after_reset,
};
static int ehci_fsl_probe(struct udevice *dev)
{
struct ehci_fsl_priv *priv = dev_get_priv(dev);
struct usb_ehci *ehci = NULL;
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
/*
* Get the base address for EHCI controller from the device node
*/
priv->hcd_base = devfdt_get_addr(dev);
if (priv->hcd_base == FDT_ADDR_T_NONE) {
debug("Can't get the EHCI register base address\n");
return -ENXIO;
}
ehci = (struct usb_ehci *)priv->hcd_base;
hccr = (struct ehci_hccr *)(&ehci->caplength);
hcor = (struct ehci_hcor *)
((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
if (ehci_fsl_init(priv, ehci, hccr, hcor) < 0)
return -ENXIO;
debug("ehci-fsl: init hccr %x and hcor %x hc_length %d\n",
(u32)hccr, (u32)hcor,
(u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
return ehci_register(dev, hccr, hcor, &fsl_ehci_ops, 0, USB_INIT_HOST);
}
static const struct udevice_id ehci_usb_ids[] = {
{ .compatible = "fsl-usb2-mph", },
{ .compatible = "fsl-usb2-dr", },
{ }
};
U_BOOT_DRIVER(ehci_fsl) = {
.name = "ehci_fsl",
.id = UCLASS_USB,
.of_match = ehci_usb_ids,
.ofdata_to_platdata = ehci_fsl_ofdata_to_platdata,
.probe = ehci_fsl_probe,
.remove = ehci_deregister,
.ops = &ehci_usb_ops,
.platdata_auto_alloc_size = sizeof(struct usb_platdata),
.priv_auto_alloc_size = sizeof(struct ehci_fsl_priv),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
#else
/*
* 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;
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)));
return ehci_fsl_init(index, ehci, *hccr, *hcor);
}
/*
* Destroy the appropriate control structures corresponding
* the the EHCI host controller.
*/
int ehci_hcd_stop(int index)
{
return 0;
}
#endif
#ifdef CONFIG_DM_USB
static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci,
struct ehci_hccr *hccr, struct ehci_hcor *hcor)
#else
static int ehci_fsl_init(int index, struct usb_ehci *ehci,
struct ehci_hccr *hccr, struct ehci_hcor *hcor)
#endif
{
const char *phy_type = NULL;
#ifndef CONFIG_DM_USB
size_t len;
char current_usb_controller[5];
#endif
#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);
}
/* 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 */
#ifdef CONFIG_DM_USB
if (priv->phy_type)
phy_type = priv->phy_type;
#else
memset(current_usb_controller, '\0', 5);
snprintf(current_usb_controller, sizeof(current_usb_controller),
"usb%d", index+1);
if (hwconfig_sub(current_usb_controller, "phy_type"))
phy_type = hwconfig_subarg(current_usb_controller,
"phy_type", &len);
#endif
else
phy_type = env_get("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)
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);
out_be32(&ehci->sictrl, 0x00000001);
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;
}
/*
* 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);
}