1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
4 *
5 * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
6 *
7 * Author: Tor Krill tor@excito.com
8 */
9
10#include <common.h>
11#include <log.h>
12#include <usb.h>
13#include <asm/io.h>
14#include <hwconfig.h>
15#include <fsl_errata.h>
16#include <fsl_usb.h>
17#include <fdt_support.h>
18
19/* USB Controllers */
20#define FSL_USB2_MPH	"fsl-usb2-mph"
21#define FSL_USB2_DR	"fsl-usb2-dr"
22#define CHIPIDEA_USB2	"chipidea,usb2"
23#define SNPS_DWC3	"snps,dwc3"
24
25static const char * const compat_usb_fsl[] = {
26	FSL_USB2_MPH,
27	FSL_USB2_DR,
28	SNPS_DWC3,
29	NULL
30};
31
32static int fdt_usb_get_node_type(void *blob, int start_offset,
33				 int *node_offset, const char **node_type)
34{
35	int i;
36	int ret = -ENOENT;
37
38	for (i = 0; compat_usb_fsl[i]; i++) {
39		*node_offset = fdt_node_offset_by_compatible
40					(blob, start_offset,
41					 compat_usb_fsl[i]);
42		if (*node_offset >= 0) {
43			*node_type = compat_usb_fsl[i];
44			ret = 0;
45			break;
46		}
47	}
48
49	return ret;
50}
51
52static int fdt_fixup_usb_mode_phy_type(void *blob, const char *mode,
53				       const char *phy_type, int start_offset)
54{
55	const char *prop_mode = "dr_mode";
56	const char *prop_type = "phy_type";
57	const char *node_type = NULL;
58	int node_offset;
59	int err;
60
61	err = fdt_usb_get_node_type(blob, start_offset,
62				    &node_offset, &node_type);
63	if (err < 0)
64		return err;
65
66	if (mode) {
67		err = fdt_setprop(blob, node_offset, prop_mode, mode,
68				  strlen(mode) + 1);
69		if (err < 0)
70			printf("WARNING: could not set %s for %s: %s.\n",
71			       prop_mode, node_type, fdt_strerror(err));
72	}
73
74	if (phy_type) {
75		err = fdt_setprop(blob, node_offset, prop_type, phy_type,
76				  strlen(phy_type) + 1);
77		if (err < 0)
78			printf("WARNING: could not set %s for %s: %s.\n",
79			       prop_type, node_type, fdt_strerror(err));
80	}
81
82	return node_offset;
83}
84
85static int fsl_fdt_fixup_usb_erratum(void *blob, const char *prop_erratum,
86				     const char *controller_type,
87				     int start_offset)
88{
89	int node_offset, err;
90	const char *node_type = NULL;
91	const char *node_name = NULL;
92
93	err = fdt_usb_get_node_type(blob, start_offset,
94				    &node_offset, &node_type);
95	if (err < 0)
96		return err;
97
98	if (!strcmp(node_type, FSL_USB2_MPH) || !strcmp(node_type, FSL_USB2_DR))
99		node_name = CHIPIDEA_USB2;
100	else
101		node_name = node_type;
102	if (strcmp(node_name, controller_type))
103		return err;
104
105	err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
106	if (err < 0) {
107		printf("ERROR: could not set %s for %s: %s.\n",
108		       prop_erratum, node_type, fdt_strerror(err));
109	}
110
111	return node_offset;
112}
113
114static int fsl_fdt_fixup_erratum(int *usb_erratum_off, void *blob,
115				 const char *controller_type, char *str,
116				 bool (*has_erratum)(void))
117{
118	char buf[32] = {0};
119
120	snprintf(buf, sizeof(buf), "fsl,usb-erratum-%s", str);
121	if (!has_erratum())
122		return -EINVAL;
123	*usb_erratum_off = fsl_fdt_fixup_usb_erratum(blob, buf, controller_type,
124						     *usb_erratum_off);
125	if (*usb_erratum_off < 0)
126		return -ENOSPC;
127	debug("Adding USB erratum %s\n", str);
128	return 0;
129}
130
131void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd)
132{
133	static const char * const modes[] = { "host", "peripheral", "otg" };
134	static const char * const phys[] = { "ulpi", "utmi", "utmi_dual" };
135	int usb_erratum_a006261_off = -1;
136	int usb_erratum_a007075_off = -1;
137	int usb_erratum_a007792_off = -1;
138	int usb_erratum_a005697_off = -1;
139	int usb_erratum_a008751_off = -1;
140	int usb_mode_off = -1;
141	int usb_phy_off = -1;
142	char str[5];
143	int i, j;
144	int ret;
145
146	for (i = 1; i <= CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
147		const char *dr_mode_type = NULL;
148		const char *dr_phy_type = NULL;
149		int mode_idx = -1, phy_idx = -1;
150
151		snprintf(str, 5, "%s%d", "usb", i);
152		if (hwconfig(str)) {
153			for (j = 0; j < ARRAY_SIZE(modes); j++) {
154				if (hwconfig_subarg_cmp(str, "dr_mode",
155							modes[j])) {
156					mode_idx = j;
157					break;
158				}
159			}
160
161			for (j = 0; j < ARRAY_SIZE(phys); j++) {
162				if (hwconfig_subarg_cmp(str, "phy_type",
163							phys[j])) {
164					phy_idx = j;
165					break;
166				}
167			}
168
169			if (mode_idx < 0 && phy_idx < 0) {
170				printf("WARNING: invalid phy or mode\n");
171				return;
172			}
173
174			if (mode_idx > -1)
175				dr_mode_type = modes[mode_idx];
176
177			if (phy_idx > -1)
178				dr_phy_type = phys[phy_idx];
179		}
180
181		if (has_dual_phy())
182			dr_phy_type = phys[2];
183
184		usb_mode_off = fdt_fixup_usb_mode_phy_type(blob,
185							   dr_mode_type, NULL,
186							   usb_mode_off);
187
188		if (usb_mode_off < 0)
189			return;
190
191		usb_phy_off = fdt_fixup_usb_mode_phy_type(blob,
192							  NULL, dr_phy_type,
193							  usb_phy_off);
194
195		if (usb_phy_off < 0)
196			return;
197
198		ret = fsl_fdt_fixup_erratum(&usb_erratum_a006261_off, blob,
199					    CHIPIDEA_USB2, "a006261",
200					    has_erratum_a006261);
201		if (ret == -ENOSPC)
202			return;
203		ret = fsl_fdt_fixup_erratum(&usb_erratum_a007075_off, blob,
204					    CHIPIDEA_USB2, "a007075",
205					    has_erratum_a007075);
206		if (ret == -ENOSPC)
207			return;
208		ret = fsl_fdt_fixup_erratum(&usb_erratum_a007792_off, blob,
209					    CHIPIDEA_USB2, "a007792",
210					    has_erratum_a007792);
211		if (ret == -ENOSPC)
212			return;
213		ret = fsl_fdt_fixup_erratum(&usb_erratum_a005697_off, blob,
214					    CHIPIDEA_USB2, "a005697",
215					    has_erratum_a005697);
216		if (ret == -ENOSPC)
217			return;
218		ret = fsl_fdt_fixup_erratum(&usb_erratum_a008751_off, blob,
219					    SNPS_DWC3, "a008751",
220					    has_erratum_a008751);
221		if (ret == -ENOSPC)
222			return;
223
224	}
225}
226