1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2015 Xilinx, Inc.
4 *
5 * Zynq USB HOST xHCI Controller
6 *
7 * Author: Siva Durga Prasad Paladugu<sivadur@xilinx.com>
8 *
9 * This file was reused from Freescale USB xHCI
10 */
11
12 #include <common.h>
13 #include <dm.h>
14 #include <usb.h>
15 #include <linux/errno.h>
16 #include <asm/arch/hardware.h>
17 #include <linux/compat.h>
18 #include <linux/usb/dwc3.h>
19 #include "xhci.h"
20
21 /* Declare global data pointer */
22 /* Default to the ZYNQMP XHCI defines */
23 #define USB3_PWRCTL_CLK_CMD_MASK 0x3FE000
24 #define USB3_PWRCTL_CLK_FREQ_MASK 0xFFC
25 #define USB3_PHY_PARTIAL_RX_POWERON BIT(6)
26 #define USB3_PHY_RX_POWERON BIT(14)
27 #define USB3_PHY_TX_POWERON BIT(15)
28 #define USB3_PHY_TX_RX_POWERON (USB3_PHY_RX_POWERON | USB3_PHY_TX_POWERON)
29 #define USB3_PWRCTL_CLK_CMD_SHIFT 14
30 #define USB3_PWRCTL_CLK_FREQ_SHIFT 22
31
32 /* USBOTGSS_WRAPPER definitions */
33 #define USBOTGSS_WRAPRESET BIT(17)
34 #define USBOTGSS_DMADISABLE BIT(16)
35 #define USBOTGSS_STANDBYMODE_NO_STANDBY BIT(4)
36 #define USBOTGSS_STANDBYMODE_SMRT BIT(5)
37 #define USBOTGSS_STANDBYMODE_SMRT_WKUP (0x3 << 4)
38 #define USBOTGSS_IDLEMODE_NOIDLE BIT(2)
39 #define USBOTGSS_IDLEMODE_SMRT BIT(3)
40 #define USBOTGSS_IDLEMODE_SMRT_WKUP (0x3 << 2)
41
42 /* USBOTGSS_IRQENABLE_SET_0 bit */
43 #define USBOTGSS_COREIRQ_EN BIT(1)
44
45 /* USBOTGSS_IRQENABLE_SET_1 bits */
46 #define USBOTGSS_IRQ_SET_1_IDPULLUP_FALL_EN BIT(1)
47 #define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_FALL_EN BIT(3)
48 #define USBOTGSS_IRQ_SET_1_CHRGVBUS_FALL_EN BIT(4)
49 #define USBOTGSS_IRQ_SET_1_DRVVBUS_FALL_EN BIT(5)
50 #define USBOTGSS_IRQ_SET_1_IDPULLUP_RISE_EN BIT(8)
51 #define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_RISE_EN BIT(11)
52 #define USBOTGSS_IRQ_SET_1_CHRGVBUS_RISE_EN BIT(12)
53 #define USBOTGSS_IRQ_SET_1_DRVVBUS_RISE_EN BIT(13)
54 #define USBOTGSS_IRQ_SET_1_OEVT_EN BIT(16)
55 #define USBOTGSS_IRQ_SET_1_DMADISABLECLR_EN BIT(17)
56
57 struct zynqmp_xhci {
58 struct usb_platdata usb_plat;
59 struct xhci_ctrl ctrl;
60 struct xhci_hccr *hcd;
61 struct dwc3 *dwc3_reg;
62 };
63
64 struct zynqmp_xhci_platdata {
65 fdt_addr_t hcd_base;
66 };
67
zynqmp_xhci_core_init(struct zynqmp_xhci * zynqmp_xhci)68 static int zynqmp_xhci_core_init(struct zynqmp_xhci *zynqmp_xhci)
69 {
70 int ret = 0;
71
72 ret = dwc3_core_init(zynqmp_xhci->dwc3_reg);
73 if (ret) {
74 debug("%s:failed to initialize core\n", __func__);
75 return ret;
76 }
77
78 /* We are hard-coding DWC3 core to Host Mode */
79 dwc3_set_mode(zynqmp_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
80
81 return ret;
82 }
83
xhci_hcd_stop(int index)84 void xhci_hcd_stop(int index)
85 {
86 /*
87 * Currently zynqmp socs do not support PHY shutdown from
88 * sw. But this support may be added in future socs.
89 */
90
91 return;
92 }
93
xhci_usb_probe(struct udevice * dev)94 static int xhci_usb_probe(struct udevice *dev)
95 {
96 struct zynqmp_xhci_platdata *plat = dev_get_platdata(dev);
97 struct zynqmp_xhci *ctx = dev_get_priv(dev);
98 struct xhci_hcor *hcor;
99 int ret;
100
101 ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
102 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
103
104 ret = zynqmp_xhci_core_init(ctx);
105 if (ret) {
106 puts("XHCI: failed to initialize controller\n");
107 return -EINVAL;
108 }
109
110 hcor = (struct xhci_hcor *)((ulong)ctx->hcd +
111 HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)));
112
113 return xhci_register(dev, ctx->hcd, hcor);
114 }
115
xhci_usb_remove(struct udevice * dev)116 static int xhci_usb_remove(struct udevice *dev)
117 {
118 return xhci_deregister(dev);
119 }
120
xhci_usb_ofdata_to_platdata(struct udevice * dev)121 static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
122 {
123 struct zynqmp_xhci_platdata *plat = dev_get_platdata(dev);
124 const void *blob = gd->fdt_blob;
125
126 /* Get the base address for XHCI controller from the device node */
127 plat->hcd_base = fdtdec_get_addr(blob, dev_of_offset(dev), "reg");
128 if (plat->hcd_base == FDT_ADDR_T_NONE) {
129 debug("Can't get the XHCI register base address\n");
130 return -ENXIO;
131 }
132
133 return 0;
134 }
135
136 U_BOOT_DRIVER(dwc3_generic_host) = {
137 .name = "dwc3-generic-host",
138 .id = UCLASS_USB,
139 .ofdata_to_platdata = xhci_usb_ofdata_to_platdata,
140 .probe = xhci_usb_probe,
141 .remove = xhci_usb_remove,
142 .ops = &xhci_usb_ops,
143 .platdata_auto_alloc_size = sizeof(struct zynqmp_xhci_platdata),
144 .priv_auto_alloc_size = sizeof(struct zynqmp_xhci),
145 .flags = DM_FLAG_ALLOC_PRIV_DMA,
146 };
147