Commit 1e7df7c4 authored by Masahiro Yamada's avatar Masahiro Yamada

usb: UniPhier: add UniPhier on-chip xHCI host driver support

Support xHCI host driver used on Panasonic UniPhier platform.
Signed-off-by: 's avatarMasahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: 's avatarMarek Vasut <marex@denx.de>
parent de01a768
......@@ -73,7 +73,8 @@ Supported devices
- UART (on-chip)
- NAND
- USB (2.0)
- USB 2.0 (EHCI)
- USB 3.0 (xHCI)
- LAN (on-board SMSC9118)
- I2C
- EEPROM (connected to the on-board I2C bus)
......
......@@ -17,6 +17,14 @@ config USB_XHCI
if USB_XHCI_HCD
config USB_XHCI_UNIPHIER
bool "Support for Panasonic UniPhier on-chip xHCI USB controller"
depends on ARCH_UNIPHIER
default y
---help---
Enables support for the on-chip xHCI controller on Panasonic
UniPhier SoCs.
endif
config USB_EHCI_HCD
......
......@@ -48,6 +48,7 @@ obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o
obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
obj-$(CONFIG_USB_XHCI_UNIPHIER) += xhci-uniphier.o
# designware
obj-$(CONFIG_USB_DWC2) += dwc2.o
/*
* Copyright (C) 2015 Panasonic Corporation
* Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/err.h>
#include <usb.h>
#include <fdtdec.h>
#include "xhci.h"
static int get_uniphier_xhci_base(int index, struct xhci_hccr **base)
{
DECLARE_GLOBAL_DATA_PTR;
int node_list[2];
fdt_addr_t addr;
int count;
count = fdtdec_find_aliases_for_id(gd->fdt_blob, "usb",
COMPAT_PANASONIC_XHCI, node_list,
ARRAY_SIZE(node_list));
if (index >= count)
return -ENODEV;
addr = fdtdec_get_addr(gd->fdt_blob, node_list[index], "reg");
if (addr == FDT_ADDR_T_NONE)
return -ENODEV;
*base = (struct xhci_hccr *)addr;
return 0;
}
#define USB3_RST_CTRL 0x00100040
#define IOMMU_RST_N (1 << 5)
#define LINK_RST_N (1 << 4)
static void uniphier_xhci_reset(void __iomem *base, int on)
{
u32 tmp;
tmp = readl(base + USB3_RST_CTRL);
if (on)
tmp &= ~(IOMMU_RST_N | LINK_RST_N);
else
tmp |= IOMMU_RST_N | LINK_RST_N;
writel(tmp, base + USB3_RST_CTRL);
}
int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
{
int ret;
struct xhci_hccr *cr;
struct xhci_hcor *or;
ret = get_uniphier_xhci_base(index, &cr);
if (ret < 0)
return ret;
uniphier_xhci_reset(cr, 0);
or = (void *)cr + HC_LENGTH(xhci_readl(&cr->cr_capbase));
*hccr = cr;
*hcor = or;
return 0;
}
void xhci_hcd_stop(int index)
{
int ret;
struct xhci_hccr *cr;
ret = get_uniphier_xhci_base(index, &cr);
if (ret < 0)
return;
uniphier_xhci_reset(cr, 1);
}
......@@ -168,6 +168,7 @@ enum fdt_compat_id {
COMPAT_AMS_AS3722, /* AMS AS3722 PMIC */
COMPAT_INTEL_ICH_SPI, /* Intel ICH7/9 SPI controller */
COMPAT_INTEL_QRK_MRC, /* Intel Quark MRC */
COMPAT_PANASONIC_XHCI, /* Panasonic UniPhier xHCI */
COMPAT_COUNT,
};
......
......@@ -76,6 +76,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(AMS_AS3722, "ams,as3722"),
COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
COMPAT(PANASONIC_XHCI, "panasonic,uniphier-xhci"),
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)
......
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