1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * OMAP USB HOST xHCI Controller
4 *
5 * (C) Copyright 2013
6 * Texas Instruments, <www.ti.com>
7 *
8 * Author: Dan Murphy <dmurphy@ti.com>
9 */
10
11#include <common.h>
12#include <log.h>
13#include <usb.h>
14#include <linux/errno.h>
15#include <asm/omap_common.h>
16#include <asm/arch/cpu.h>
17#include <asm/arch/sys_proto.h>
18
19#include <linux/compat.h>
20#include <linux/usb/dwc3.h>
21#include <linux/usb/xhci-omap.h>
22
23#include <usb/xhci.h>
24
25/* Declare global data pointer */
26static struct omap_xhci omap;
27
28static int omap_xhci_core_init(struct omap_xhci *omap)
29{
30	int ret = 0;
31
32	usb_phy_power(1);
33	omap_enable_phy(omap);
34
35	ret = dwc3_core_init(omap->dwc3_reg);
36	if (ret) {
37		debug("%s:failed to initialize core\n", __func__);
38		return ret;
39	}
40
41	/* We are hard-coding DWC3 core to Host Mode */
42	dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
43
44	return ret;
45}
46
47static void omap_xhci_core_exit(struct omap_xhci *omap)
48{
49	usb_phy_power(0);
50}
51
52int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
53{
54	struct omap_xhci *ctx = &omap;
55	int ret = 0;
56
57	ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE;
58	ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
59	ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE;
60	ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE;
61
62	ret = board_usb_init(index, USB_INIT_HOST);
63	if (ret != 0) {
64		puts("Failed to initialize board for USB\n");
65		return ret;
66	}
67
68	ret = omap_xhci_core_init(ctx);
69	if (ret < 0) {
70		puts("Failed to initialize xhci\n");
71		return ret;
72	}
73
74	*hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE);
75	*hcor = (struct xhci_hcor *)((uint32_t) *hccr
76				+ HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
77
78	debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n",
79	      (uint32_t)*hccr, (uint32_t)*hcor,
80	      (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
81
82	return ret;
83}
84
85void xhci_hcd_stop(int index)
86{
87	struct omap_xhci *ctx = &omap;
88
89	omap_xhci_core_exit(ctx);
90	board_usb_cleanup(index, USB_INIT_HOST);
91}
92