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/*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* FSL USB HOST xHCI Controller
*
* Author: Ramneek Mehresh<ramneek.mehresh@freescale.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <usb.h>
#include <asm-generic/errno.h>
#include <linux/compat.h>
#include <linux/usb/xhci-fsl.h>
#include <linux/usb/dwc3.h>
#include "xhci.h"
#include <fsl_errata.h>
#include <fsl_usb.h>
/* Declare global data pointer */
DECLARE_GLOBAL_DATA_PTR;
static struct fsl_xhci fsl_xhci;
unsigned long ctr_addr[] = FSL_USB_XHCI_ADDR;
__weak int __board_usb_init(int index, enum usb_init_type init)
{
return 0;
}
static int erratum_a008751(void)
{
#if defined(CONFIG_TARGET_LS2080AQDS) || defined(CONFIG_TARGET_LS2080ARDB)
u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
writel(SCFG_USB3PRM1CR_INIT, scfg + SCFG_USB3PRM1CR / 4);
return 0;
#endif
return 1;
}
static void fsl_apply_xhci_errata(void)
{
int ret;
if (has_erratum_a008751()) {
ret = erratum_a008751();
if (ret != 0)
puts("Failed to apply erratum a008751\n");
}
}
static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci)
{
int ret = 0;
ret = dwc3_core_init(fsl_xhci->dwc3_reg);
if (ret) {
debug("%s:failed to initialize core\n", __func__);
return ret;
}
/* We are hard-coding DWC3 core to Host Mode */
dwc3_set_mode(fsl_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
/* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */
dwc3_set_fladj(fsl_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT);
return ret;
}
static int fsl_xhci_core_exit(struct fsl_xhci *fsl_xhci)
{
/*
* Currently fsl socs do not support PHY shutdown from
* sw. But this support may be added in future socs.
*/
return 0;
}
int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
{
struct fsl_xhci *ctx = &fsl_xhci;
int ret = 0;
ctx->hcd = (struct xhci_hccr *)ctr_addr[index];
ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
ret = board_usb_init(index, USB_INIT_HOST);
if (ret != 0) {
puts("Failed to initialize board for USB\n");
return ret;
}
fsl_apply_xhci_errata();
ret = fsl_xhci_core_init(ctx);
if (ret < 0) {
puts("Failed to initialize xhci\n");
return ret;
}
*hccr = (struct xhci_hccr *)ctx->hcd;
*hcor = (struct xhci_hcor *)((uintptr_t) *hccr
+ HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
debug("fsl-xhci: init hccr %lx and hcor %lx hc_length %lx\n",
(uintptr_t)*hccr, (uintptr_t)*hcor,
(uintptr_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
return ret;
}
void xhci_hcd_stop(int index)
{
struct fsl_xhci *ctx = &fsl_xhci;
fsl_xhci_core_exit(ctx);
}
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