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 */
26 static struct omap_xhci omap;
27
omap_xhci_core_init(struct omap_xhci * omap)28 static 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
omap_xhci_core_exit(struct omap_xhci * omap)47 static void omap_xhci_core_exit(struct omap_xhci *omap)
48 {
49 usb_phy_power(0);
50 }
51
xhci_hcd_init(int index,struct xhci_hccr ** hccr,struct xhci_hcor ** hcor)52 int 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
xhci_hcd_stop(int index)85 void 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