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/*
* Copyright (c) 2016 Rockchip, Inc.
* Authors: Daniel Meng <daniel.meng@rock-chips.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <malloc.h>
#include <usb.h>
#include <watchdog.h>
#include <asm/gpio.h>
#include <asm-generic/errno.h>
#include <linux/compat.h>
#include <linux/usb/dwc3.h>
#include "xhci.h"
DECLARE_GLOBAL_DATA_PTR;
struct rockchip_xhci_platdata {
fdt_addr_t hcd_base;
fdt_addr_t phy_base;
struct gpio_desc vbus_gpio;
};
/*
* Contains pointers to register base addresses
* for the usb controller.
*/
struct rockchip_xhci {
struct usb_platdata usb_plat;
struct xhci_ctrl ctrl;
struct xhci_hccr *hcd;
struct dwc3 *dwc3_reg;
};
static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
{
struct rockchip_xhci_platdata *plat = dev_get_platdata(dev);
struct udevice *child;
int ret = 0;
/*
* Get the base address for XHCI controller from the device node
*/
plat->hcd_base = dev_get_addr(dev);
if (plat->hcd_base == FDT_ADDR_T_NONE) {
debug("Can't get the XHCI register base address\n");
return -ENXIO;
}
/* Get the base address for usbphy from the device node */
for (device_find_first_child(dev, &child); child;
device_find_next_child(&child)) {
if (!of_device_is_compatible(child, "rockchip,rk3399-usb3-phy"))
continue;
plat->phy_base = dev_get_addr(child);
break;
}
if (plat->phy_base == FDT_ADDR_T_NONE) {
debug("Can't get the usbphy register address\n");
return -ENXIO;
}
/* Vbus gpio */
ret = gpio_request_by_name(dev, "rockchip,vbus-gpio", 0,
&plat->vbus_gpio, GPIOD_IS_OUT);
if (ret)
debug("rockchip,vbus-gpio node missing!");
return 0;
}
/*
* rockchip_dwc3_phy_setup() - Configure USB PHY Interface of DWC3 Core
* @dwc: Pointer to our controller context structure
* @dev: Pointer to ulcass device
*/
static void rockchip_dwc3_phy_setup(struct dwc3 *dwc3_reg,
struct udevice *dev)
{
u32 reg;
const void *blob = gd->fdt_blob;
u32 utmi_bits;
/* Set dwc3 usb2 phy config */
reg = readl(&dwc3_reg->g_usb2phycfg[0]);
if (fdtdec_get_bool(blob, dev->of_offset,
"snps,dis-enblslpm-quirk"))
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
utmi_bits = fdtdec_get_int(blob, dev->of_offset,
"snps,phyif-utmi-bits", -1);
if (utmi_bits == 16) {
reg |= DWC3_GUSB2PHYCFG_PHYIF;
reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT;
} else if (utmi_bits == 8) {
reg &= ~DWC3_GUSB2PHYCFG_PHYIF;
reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_8BIT;
}
if (fdtdec_get_bool(blob, dev->of_offset,
"snps,dis-u2-freeclk-exists-quirk"))
reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
if (fdtdec_get_bool(blob, dev->of_offset,
"snps,dis-u2-susphy-quirk"))
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
writel(reg, &dwc3_reg->g_usb2phycfg[0]);
}
static int rockchip_xhci_core_init(struct rockchip_xhci *rkxhci,
struct udevice *dev)
{
int ret;
ret = dwc3_core_init(rkxhci->dwc3_reg);
if (ret) {
debug("failed to initialize core\n");
return ret;
}
rockchip_dwc3_phy_setup(rkxhci->dwc3_reg, dev);
/* We are hard-coding DWC3 core to Host Mode */
dwc3_set_mode(rkxhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
return 0;
}
static int rockchip_xhci_core_exit(struct rockchip_xhci *rkxhci)
{
return 0;
}
static int xhci_usb_probe(struct udevice *dev)
{
struct rockchip_xhci_platdata *plat = dev_get_platdata(dev);
struct rockchip_xhci *ctx = dev_get_priv(dev);
struct xhci_hcor *hcor;
int ret;
ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
hcor = (struct xhci_hcor *)((uint64_t)ctx->hcd +
HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)));
/* setup the Vbus gpio here */
if (dm_gpio_is_valid(&plat->vbus_gpio))
dm_gpio_set_value(&plat->vbus_gpio, 1);
ret = rockchip_xhci_core_init(ctx, dev);
if (ret) {
debug("XHCI: failed to initialize controller\n");
return ret;
}
return xhci_register(dev, ctx->hcd, hcor);
}
static int xhci_usb_remove(struct udevice *dev)
{
struct rockchip_xhci *ctx = dev_get_priv(dev);
int ret;
ret = xhci_deregister(dev);
if (ret)
return ret;
ret = rockchip_xhci_core_exit(ctx);
if (ret)
return ret;
return 0;
}
static const struct udevice_id xhci_usb_ids[] = {
{ .compatible = "rockchip,rk3399-xhci" },
{ }
};
U_BOOT_DRIVER(usb_xhci) = {
.name = "xhci_rockchip",
.id = UCLASS_USB,
.of_match = xhci_usb_ids,
.ofdata_to_platdata = xhci_usb_ofdata_to_platdata,
.probe = xhci_usb_probe,
.remove = xhci_usb_remove,
.ops = &xhci_usb_ops,
.bind = dm_scan_fdt_dev,
.platdata_auto_alloc_size = sizeof(struct rockchip_xhci_platdata),
.priv_auto_alloc_size = sizeof(struct rockchip_xhci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
static const struct udevice_id usb_phy_ids[] = {
{ .compatible = "rockchip,rk3399-usb3-phy" },
{ }
};
U_BOOT_DRIVER(usb_phy) = {
.name = "usb_phy_rockchip",
.of_match = usb_phy_ids,
};
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