1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2015,2016 Freescale Semiconductor, Inc.
4 *
5 * FSL USB HOST xHCI Controller
6 *
7 * Author: Ramneek Mehresh<ramneek.mehresh@freescale.com>
8 */
9
10 #include <common.h>
11 #include <usb.h>
12 #include <linux/errno.h>
13 #include <linux/compat.h>
14 #include <linux/usb/xhci-fsl.h>
15 #include <linux/usb/dwc3.h>
16 #include "xhci.h"
17 #include <fsl_errata.h>
18 #include <fsl_usb.h>
19 #include <dm.h>
20
21 /* Declare global data pointer */
22 #if !CONFIG_IS_ENABLED(DM_USB)
23 static struct fsl_xhci fsl_xhci;
24 unsigned long ctr_addr[] = FSL_USB_XHCI_ADDR;
25 #else
26 struct xhci_fsl_priv {
27 struct xhci_ctrl xhci;
28 fdt_addr_t hcd_base;
29 struct fsl_xhci ctx;
30 };
31 #endif
32
__board_usb_init(int index,enum usb_init_type init)33 __weak int __board_usb_init(int index, enum usb_init_type init)
34 {
35 return 0;
36 }
37
erratum_a008751(void)38 static int erratum_a008751(void)
39 {
40 #if defined(CONFIG_TARGET_LS2080AQDS) || defined(CONFIG_TARGET_LS2080ARDB) ||\
41 defined(CONFIG_TARGET_LS2080AQDS)
42 u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
43 writel(SCFG_USB3PRM1CR_INIT, scfg + SCFG_USB3PRM1CR / 4);
44 return 0;
45 #endif
46 return 1;
47 }
48
fsl_apply_xhci_errata(void)49 static void fsl_apply_xhci_errata(void)
50 {
51 int ret;
52 if (has_erratum_a008751()) {
53 ret = erratum_a008751();
54 if (ret != 0)
55 puts("Failed to apply erratum a008751\n");
56 }
57 }
58
fsl_xhci_set_beat_burst_length(struct dwc3 * dwc3_reg)59 static void fsl_xhci_set_beat_burst_length(struct dwc3 *dwc3_reg)
60 {
61 clrsetbits_le32(&dwc3_reg->g_sbuscfg0, USB3_ENABLE_BEAT_BURST_MASK,
62 USB3_ENABLE_BEAT_BURST);
63 setbits_le32(&dwc3_reg->g_sbuscfg1, USB3_SET_BEAT_BURST_LIMIT);
64 }
65
fsl_xhci_core_init(struct fsl_xhci * fsl_xhci)66 static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci)
67 {
68 int ret = 0;
69
70 ret = dwc3_core_init(fsl_xhci->dwc3_reg);
71 if (ret) {
72 debug("%s:failed to initialize core\n", __func__);
73 return ret;
74 }
75
76 /* We are hard-coding DWC3 core to Host Mode */
77 dwc3_set_mode(fsl_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
78
79 /* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */
80 dwc3_set_fladj(fsl_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT);
81
82 /* Change beat burst and outstanding pipelined transfers requests */
83 fsl_xhci_set_beat_burst_length(fsl_xhci->dwc3_reg);
84
85 /*
86 * A-010151: The dwc3 phy TSMC 28-nm HPM 0.9/1.8 V does not
87 * reliably support Rx Detect in P3 mode(P3 is the default
88 * setting). Therefore, some USB3.0 devices may not be detected
89 * reliably in Super Speed mode. So, USB controller to configure
90 * USB in P2 mode whenever the Receive Detect feature is required.
91 * whenever the Receive Detect feature is required.
92 */
93 if (has_erratum_a010151())
94 clrsetbits_le32(&fsl_xhci->dwc3_reg->g_usb3pipectl[0],
95 DWC3_GUSB3PIPECTL_DISRXDETP3,
96 DWC3_GUSB3PIPECTL_DISRXDETP3);
97
98 return ret;
99 }
100
fsl_xhci_core_exit(struct fsl_xhci * fsl_xhci)101 static int fsl_xhci_core_exit(struct fsl_xhci *fsl_xhci)
102 {
103 /*
104 * Currently fsl socs do not support PHY shutdown from
105 * sw. But this support may be added in future socs.
106 */
107 return 0;
108 }
109
110 #if CONFIG_IS_ENABLED(DM_USB)
xhci_fsl_probe(struct udevice * dev)111 static int xhci_fsl_probe(struct udevice *dev)
112 {
113 struct xhci_fsl_priv *priv = dev_get_priv(dev);
114 struct xhci_hccr *hccr;
115 struct xhci_hcor *hcor;
116
117 int ret = 0;
118
119 /*
120 * Get the base address for XHCI controller from the device node
121 */
122 priv->hcd_base = devfdt_get_addr(dev);
123 if (priv->hcd_base == FDT_ADDR_T_NONE) {
124 debug("Can't get the XHCI register base address\n");
125 return -ENXIO;
126 }
127 priv->ctx.hcd = (struct xhci_hccr *)priv->hcd_base;
128 priv->ctx.dwc3_reg = (struct dwc3 *)((char *)(priv->hcd_base) +
129 DWC3_REG_OFFSET);
130
131 fsl_apply_xhci_errata();
132
133 ret = fsl_xhci_core_init(&priv->ctx);
134 if (ret < 0) {
135 puts("Failed to initialize xhci\n");
136 return ret;
137 }
138
139 hccr = (struct xhci_hccr *)(priv->ctx.hcd);
140 hcor = (struct xhci_hcor *)((uintptr_t) hccr
141 + HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
142
143 debug("xhci-fsl: init hccr %lx and hcor %lx hc_length %lx\n",
144 (uintptr_t)hccr, (uintptr_t)hcor,
145 (uintptr_t)HC_LENGTH(xhci_readl(&hccr->cr_capbase)));
146
147 return xhci_register(dev, hccr, hcor);
148 }
149
xhci_fsl_remove(struct udevice * dev)150 static int xhci_fsl_remove(struct udevice *dev)
151 {
152 struct xhci_fsl_priv *priv = dev_get_priv(dev);
153
154 fsl_xhci_core_exit(&priv->ctx);
155
156 return xhci_deregister(dev);
157 }
158
159 static const struct udevice_id xhci_usb_ids[] = {
160 { .compatible = "fsl,layerscape-dwc3", },
161 { }
162 };
163
164 U_BOOT_DRIVER(xhci_fsl) = {
165 .name = "xhci_fsl",
166 .id = UCLASS_USB,
167 .of_match = xhci_usb_ids,
168 .probe = xhci_fsl_probe,
169 .remove = xhci_fsl_remove,
170 .ops = &xhci_usb_ops,
171 .platdata_auto_alloc_size = sizeof(struct usb_platdata),
172 .priv_auto_alloc_size = sizeof(struct xhci_fsl_priv),
173 .flags = DM_FLAG_ALLOC_PRIV_DMA,
174 };
175 #else
xhci_hcd_init(int index,struct xhci_hccr ** hccr,struct xhci_hcor ** hcor)176 int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
177 {
178 struct fsl_xhci *ctx = &fsl_xhci;
179 int ret = 0;
180
181 ctx->hcd = (struct xhci_hccr *)ctr_addr[index];
182 ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
183
184 ret = board_usb_init(index, USB_INIT_HOST);
185 if (ret != 0) {
186 puts("Failed to initialize board for USB\n");
187 return ret;
188 }
189
190 fsl_apply_xhci_errata();
191
192 ret = fsl_xhci_core_init(ctx);
193 if (ret < 0) {
194 puts("Failed to initialize xhci\n");
195 return ret;
196 }
197
198 *hccr = (struct xhci_hccr *)ctx->hcd;
199 *hcor = (struct xhci_hcor *)((uintptr_t) *hccr
200 + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
201
202 debug("fsl-xhci: init hccr %lx and hcor %lx hc_length %lx\n",
203 (uintptr_t)*hccr, (uintptr_t)*hcor,
204 (uintptr_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
205
206 return ret;
207 }
208
xhci_hcd_stop(int index)209 void xhci_hcd_stop(int index)
210 {
211 struct fsl_xhci *ctx = &fsl_xhci;
212
213 fsl_xhci_core_exit(ctx);
214 }
215 #endif
216