mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-16 23:18:51 +09:00
![Mateusz Kulikowski](/assets/img/avatar_default.png)
This driver is able to reconfigure OTG controller into HOST mode. Board can add board-specific initialization as board_prepare_usb(). It requires USB_ULPI_VIEWPORT enabled in board configuration. Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com> Acked-by: Marek Vasut <marex@denx.de> Tested-by: Simon Glass <sjg@chromium.org>
179 lines
4.1 KiB
C
179 lines
4.1 KiB
C
/*
|
|
* Qualcomm EHCI driver
|
|
*
|
|
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
|
|
*
|
|
* Based on Linux driver
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <fdtdec.h>
|
|
#include <libfdt.h>
|
|
#include <usb.h>
|
|
#include <usb/ehci-ci.h>
|
|
#include <usb/ulpi.h>
|
|
#include <wait_bit.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/io.h>
|
|
#include <linux/compat.h>
|
|
#include "ehci.h"
|
|
|
|
/* PHY viewport regs */
|
|
#define ULPI_MISC_A_READ 0x96
|
|
#define ULPI_MISC_A_SET 0x97
|
|
#define ULPI_MISC_A_CLEAR 0x98
|
|
#define ULPI_MISC_A_VBUSVLDEXTSEL (1 << 1)
|
|
#define ULPI_MISC_A_VBUSVLDEXT (1 << 0)
|
|
|
|
#define GEN2_SESS_VLD_CTRL_EN (1 << 7)
|
|
|
|
#define SESS_VLD_CTRL (1 << 25)
|
|
|
|
struct msm_ehci_priv {
|
|
struct ehci_ctrl ctrl; /* Needed by EHCI */
|
|
struct usb_ehci *ehci; /* Start of IP core*/
|
|
struct ulpi_viewport ulpi_vp; /* ULPI Viewport */
|
|
};
|
|
|
|
int __weak board_prepare_usb(enum usb_init_type type)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void setup_usb_phy(struct msm_ehci_priv *priv)
|
|
{
|
|
/* Select and enable external configuration with USB PHY */
|
|
ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET,
|
|
ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
|
|
}
|
|
|
|
static void reset_usb_phy(struct msm_ehci_priv *priv)
|
|
{
|
|
/* Disable VBUS mimicing in the controller. */
|
|
ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR,
|
|
ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
|
|
}
|
|
|
|
|
|
static int msm_init_after_reset(struct ehci_ctrl *dev)
|
|
{
|
|
struct msm_ehci_priv *p = container_of(dev, struct msm_ehci_priv, ctrl);
|
|
struct usb_ehci *ehci = p->ehci;
|
|
|
|
/* select ULPI phy */
|
|
writel(PORT_PTS_ULPI, &ehci->portsc);
|
|
setup_usb_phy(p);
|
|
|
|
/* Enable sess_vld */
|
|
setbits_le32(&ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
|
|
|
|
/* Enable external vbus configuration in the LINK */
|
|
setbits_le32(&ehci->usbcmd, SESS_VLD_CTRL);
|
|
|
|
/* USB_OTG_HS_AHB_BURST */
|
|
writel(0x0, &ehci->sbuscfg);
|
|
|
|
/* USB_OTG_HS_AHB_MODE: HPROT_MODE */
|
|
/* Bus access related config. */
|
|
writel(0x08, &ehci->sbusmode);
|
|
|
|
/* set mode to host controller */
|
|
writel(CM_HOST, &ehci->usbmode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct ehci_ops msm_ehci_ops = {
|
|
.init_after_reset = msm_init_after_reset
|
|
};
|
|
|
|
static int ehci_usb_probe(struct udevice *dev)
|
|
{
|
|
struct msm_ehci_priv *p = dev_get_priv(dev);
|
|
struct usb_ehci *ehci = p->ehci;
|
|
struct ehci_hccr *hccr;
|
|
struct ehci_hcor *hcor;
|
|
int ret;
|
|
|
|
hccr = (struct ehci_hccr *)((phys_addr_t)&ehci->caplength);
|
|
hcor = (struct ehci_hcor *)((phys_addr_t)hccr +
|
|
HC_LENGTH(ehci_readl(&(hccr)->cr_capbase)));
|
|
|
|
ret = board_prepare_usb(USB_INIT_HOST);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return ehci_register(dev, hccr, hcor, &msm_ehci_ops, 0, USB_INIT_HOST);
|
|
}
|
|
|
|
static int ehci_usb_remove(struct udevice *dev)
|
|
{
|
|
struct msm_ehci_priv *p = dev_get_priv(dev);
|
|
struct usb_ehci *ehci = p->ehci;
|
|
int ret;
|
|
|
|
ret = ehci_deregister(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Stop controller. */
|
|
clrbits_le32(&ehci->usbcmd, CMD_RUN);
|
|
|
|
reset_usb_phy(p);
|
|
|
|
ret = board_prepare_usb(USB_INIT_DEVICE); /* Board specific hook */
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Reset controller */
|
|
setbits_le32(&ehci->usbcmd, CMD_RESET);
|
|
|
|
/* Wait for reset */
|
|
if (wait_for_bit(__func__, &ehci->usbcmd, CMD_RESET, false, 30,
|
|
false)) {
|
|
printf("Stuck on USB reset.\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct msm_ehci_priv *priv = dev_get_priv(dev);
|
|
|
|
priv->ulpi_vp.port_num = 0;
|
|
priv->ehci = (void *)dev_get_addr(dev);
|
|
|
|
if (priv->ehci == (void *)FDT_ADDR_T_NONE)
|
|
return -EINVAL;
|
|
|
|
/* Warning: this will not work if viewport address is > 64 bit due to
|
|
* ULPI design.
|
|
*/
|
|
priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id ehci_usb_ids[] = {
|
|
{ .compatible = "qcom,ehci-host", },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(usb_ehci) = {
|
|
.name = "ehci_msm",
|
|
.id = UCLASS_USB,
|
|
.of_match = ehci_usb_ids,
|
|
.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
|
|
.probe = ehci_usb_probe,
|
|
.remove = ehci_usb_remove,
|
|
.ops = &ehci_usb_ops,
|
|
.priv_auto_alloc_size = sizeof(struct msm_ehci_priv),
|
|
.flags = DM_FLAG_ALLOC_PRIV_DMA,
|
|
};
|