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 <usb.h>
12 #include <asm/io.h>
13 #include <hwconfig.h>
14 #include <fsl_errata.h>
15 #include <fsl_usb.h>
16 #include <fdt_support.h>
17
18 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
19 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
20 #endif
21
22 /* USB Controllers */
23 #define FSL_USB2_MPH "fsl-usb2-mph"
24 #define FSL_USB2_DR "fsl-usb2-dr"
25 #define CHIPIDEA_USB2 "chipidea,usb2"
26 #define SNPS_DWC3 "snps,dwc3"
27
28 static const char * const compat_usb_fsl[] = {
29 FSL_USB2_MPH,
30 FSL_USB2_DR,
31 SNPS_DWC3,
32 NULL
33 };
34
fdt_usb_get_node_type(void * blob,int start_offset,int * node_offset,const char ** node_type)35 static int fdt_usb_get_node_type(void *blob, int start_offset,
36 int *node_offset, const char **node_type)
37 {
38 int i;
39 int ret = -ENOENT;
40
41 for (i = 0; compat_usb_fsl[i]; i++) {
42 *node_offset = fdt_node_offset_by_compatible
43 (blob, start_offset,
44 compat_usb_fsl[i]);
45 if (*node_offset >= 0) {
46 *node_type = compat_usb_fsl[i];
47 ret = 0;
48 break;
49 }
50 }
51
52 return ret;
53 }
54
fdt_fixup_usb_mode_phy_type(void * blob,const char * mode,const char * phy_type,int start_offset)55 static int fdt_fixup_usb_mode_phy_type(void *blob, const char *mode,
56 const char *phy_type, int start_offset)
57 {
58 const char *prop_mode = "dr_mode";
59 const char *prop_type = "phy_type";
60 const char *node_type = NULL;
61 int node_offset;
62 int err;
63
64 err = fdt_usb_get_node_type(blob, start_offset,
65 &node_offset, &node_type);
66 if (err < 0)
67 return err;
68
69 if (mode) {
70 err = fdt_setprop(blob, node_offset, prop_mode, mode,
71 strlen(mode) + 1);
72 if (err < 0)
73 printf("WARNING: could not set %s for %s: %s.\n",
74 prop_mode, node_type, fdt_strerror(err));
75 }
76
77 if (phy_type) {
78 err = fdt_setprop(blob, node_offset, prop_type, phy_type,
79 strlen(phy_type) + 1);
80 if (err < 0)
81 printf("WARNING: could not set %s for %s: %s.\n",
82 prop_type, node_type, fdt_strerror(err));
83 }
84
85 return node_offset;
86 }
87
fsl_fdt_fixup_usb_erratum(void * blob,const char * prop_erratum,const char * controller_type,int start_offset)88 static int fsl_fdt_fixup_usb_erratum(void *blob, const char *prop_erratum,
89 const char *controller_type,
90 int start_offset)
91 {
92 int node_offset, err;
93 const char *node_type = NULL;
94 const char *node_name = NULL;
95
96 err = fdt_usb_get_node_type(blob, start_offset,
97 &node_offset, &node_type);
98 if (err < 0)
99 return err;
100
101 if (!strcmp(node_type, FSL_USB2_MPH) || !strcmp(node_type, FSL_USB2_DR))
102 node_name = CHIPIDEA_USB2;
103 else
104 node_name = node_type;
105 if (strcmp(node_name, controller_type))
106 return err;
107
108 err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
109 if (err < 0) {
110 printf("ERROR: could not set %s for %s: %s.\n",
111 prop_erratum, node_type, fdt_strerror(err));
112 }
113
114 return node_offset;
115 }
116
fsl_fdt_fixup_erratum(int * usb_erratum_off,void * blob,const char * controller_type,char * str,bool (* has_erratum)(void))117 static int fsl_fdt_fixup_erratum(int *usb_erratum_off, void *blob,
118 const char *controller_type, char *str,
119 bool (*has_erratum)(void))
120 {
121 char buf[32] = {0};
122
123 snprintf(buf, sizeof(buf), "fsl,usb-erratum-%s", str);
124 if (!has_erratum())
125 return -EINVAL;
126 *usb_erratum_off = fsl_fdt_fixup_usb_erratum(blob, buf, controller_type,
127 *usb_erratum_off);
128 if (*usb_erratum_off < 0)
129 return -ENOSPC;
130 debug("Adding USB erratum %s\n", str);
131 return 0;
132 }
133
fsl_fdt_fixup_dr_usb(void * blob,bd_t * bd)134 void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd)
135 {
136 static const char * const modes[] = { "host", "peripheral", "otg" };
137 static const char * const phys[] = { "ulpi", "utmi", "utmi_dual" };
138 int usb_erratum_a006261_off = -1;
139 int usb_erratum_a007075_off = -1;
140 int usb_erratum_a007792_off = -1;
141 int usb_erratum_a005697_off = -1;
142 int usb_erratum_a008751_off = -1;
143 int usb_mode_off = -1;
144 int usb_phy_off = -1;
145 char str[5];
146 int i, j;
147 int ret;
148
149 for (i = 1; i <= CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
150 const char *dr_mode_type = NULL;
151 const char *dr_phy_type = NULL;
152 int mode_idx = -1, phy_idx = -1;
153
154 snprintf(str, 5, "%s%d", "usb", i);
155 if (hwconfig(str)) {
156 for (j = 0; j < ARRAY_SIZE(modes); j++) {
157 if (hwconfig_subarg_cmp(str, "dr_mode",
158 modes[j])) {
159 mode_idx = j;
160 break;
161 }
162 }
163
164 for (j = 0; j < ARRAY_SIZE(phys); j++) {
165 if (hwconfig_subarg_cmp(str, "phy_type",
166 phys[j])) {
167 phy_idx = j;
168 break;
169 }
170 }
171
172 if (mode_idx < 0 && phy_idx < 0) {
173 printf("WARNING: invalid phy or mode\n");
174 return;
175 }
176
177 if (mode_idx > -1)
178 dr_mode_type = modes[mode_idx];
179
180 if (phy_idx > -1)
181 dr_phy_type = phys[phy_idx];
182 }
183
184 if (has_dual_phy())
185 dr_phy_type = phys[2];
186
187 usb_mode_off = fdt_fixup_usb_mode_phy_type(blob,
188 dr_mode_type, NULL,
189 usb_mode_off);
190
191 if (usb_mode_off < 0)
192 return;
193
194 usb_phy_off = fdt_fixup_usb_mode_phy_type(blob,
195 NULL, dr_phy_type,
196 usb_phy_off);
197
198 if (usb_phy_off < 0)
199 return;
200
201 ret = fsl_fdt_fixup_erratum(&usb_erratum_a006261_off, blob,
202 CHIPIDEA_USB2, "a006261",
203 has_erratum_a006261);
204 if (ret == -ENOSPC)
205 return;
206 ret = fsl_fdt_fixup_erratum(&usb_erratum_a007075_off, blob,
207 CHIPIDEA_USB2, "a007075",
208 has_erratum_a007075);
209 if (ret == -ENOSPC)
210 return;
211 ret = fsl_fdt_fixup_erratum(&usb_erratum_a007792_off, blob,
212 CHIPIDEA_USB2, "a007792",
213 has_erratum_a007792);
214 if (ret == -ENOSPC)
215 return;
216 ret = fsl_fdt_fixup_erratum(&usb_erratum_a005697_off, blob,
217 CHIPIDEA_USB2, "a005697",
218 has_erratum_a005697);
219 if (ret == -ENOSPC)
220 return;
221 ret = fsl_fdt_fixup_erratum(&usb_erratum_a008751_off, blob,
222 SNPS_DWC3, "a008751",
223 has_erratum_a008751);
224 if (ret == -ENOSPC)
225 return;
226
227 }
228 }
229