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 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
20 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
21 #endif
22 
23 /* USB Controllers */
24 #define FSL_USB2_MPH	"fsl-usb2-mph"
25 #define FSL_USB2_DR	"fsl-usb2-dr"
26 #define CHIPIDEA_USB2	"chipidea,usb2"
27 #define SNPS_DWC3	"snps,dwc3"
28 
29 static const char * const compat_usb_fsl[] = {
30 	FSL_USB2_MPH,
31 	FSL_USB2_DR,
32 	SNPS_DWC3,
33 	NULL
34 };
35 
fdt_usb_get_node_type(void * blob,int start_offset,int * node_offset,const char ** node_type)36 static int fdt_usb_get_node_type(void *blob, int start_offset,
37 				 int *node_offset, const char **node_type)
38 {
39 	int i;
40 	int ret = -ENOENT;
41 
42 	for (i = 0; compat_usb_fsl[i]; i++) {
43 		*node_offset = fdt_node_offset_by_compatible
44 					(blob, start_offset,
45 					 compat_usb_fsl[i]);
46 		if (*node_offset >= 0) {
47 			*node_type = compat_usb_fsl[i];
48 			ret = 0;
49 			break;
50 		}
51 	}
52 
53 	return ret;
54 }
55 
fdt_fixup_usb_mode_phy_type(void * blob,const char * mode,const char * phy_type,int start_offset)56 static int fdt_fixup_usb_mode_phy_type(void *blob, const char *mode,
57 				       const char *phy_type, int start_offset)
58 {
59 	const char *prop_mode = "dr_mode";
60 	const char *prop_type = "phy_type";
61 	const char *node_type = NULL;
62 	int node_offset;
63 	int err;
64 
65 	err = fdt_usb_get_node_type(blob, start_offset,
66 				    &node_offset, &node_type);
67 	if (err < 0)
68 		return err;
69 
70 	if (mode) {
71 		err = fdt_setprop(blob, node_offset, prop_mode, mode,
72 				  strlen(mode) + 1);
73 		if (err < 0)
74 			printf("WARNING: could not set %s for %s: %s.\n",
75 			       prop_mode, node_type, fdt_strerror(err));
76 	}
77 
78 	if (phy_type) {
79 		err = fdt_setprop(blob, node_offset, prop_type, phy_type,
80 				  strlen(phy_type) + 1);
81 		if (err < 0)
82 			printf("WARNING: could not set %s for %s: %s.\n",
83 			       prop_type, node_type, fdt_strerror(err));
84 	}
85 
86 	return node_offset;
87 }
88 
fsl_fdt_fixup_usb_erratum(void * blob,const char * prop_erratum,const char * controller_type,int start_offset)89 static int fsl_fdt_fixup_usb_erratum(void *blob, const char *prop_erratum,
90 				     const char *controller_type,
91 				     int start_offset)
92 {
93 	int node_offset, err;
94 	const char *node_type = NULL;
95 	const char *node_name = NULL;
96 
97 	err = fdt_usb_get_node_type(blob, start_offset,
98 				    &node_offset, &node_type);
99 	if (err < 0)
100 		return err;
101 
102 	if (!strcmp(node_type, FSL_USB2_MPH) || !strcmp(node_type, FSL_USB2_DR))
103 		node_name = CHIPIDEA_USB2;
104 	else
105 		node_name = node_type;
106 	if (strcmp(node_name, controller_type))
107 		return err;
108 
109 	err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
110 	if (err < 0) {
111 		printf("ERROR: could not set %s for %s: %s.\n",
112 		       prop_erratum, node_type, fdt_strerror(err));
113 	}
114 
115 	return node_offset;
116 }
117 
fsl_fdt_fixup_erratum(int * usb_erratum_off,void * blob,const char * controller_type,char * str,bool (* has_erratum)(void))118 static int fsl_fdt_fixup_erratum(int *usb_erratum_off, void *blob,
119 				 const char *controller_type, char *str,
120 				 bool (*has_erratum)(void))
121 {
122 	char buf[32] = {0};
123 
124 	snprintf(buf, sizeof(buf), "fsl,usb-erratum-%s", str);
125 	if (!has_erratum())
126 		return -EINVAL;
127 	*usb_erratum_off = fsl_fdt_fixup_usb_erratum(blob, buf, controller_type,
128 						     *usb_erratum_off);
129 	if (*usb_erratum_off < 0)
130 		return -ENOSPC;
131 	debug("Adding USB erratum %s\n", str);
132 	return 0;
133 }
134 
fsl_fdt_fixup_dr_usb(void * blob,struct bd_info * bd)135 void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd)
136 {
137 	static const char * const modes[] = { "host", "peripheral", "otg" };
138 	static const char * const phys[] = { "ulpi", "utmi", "utmi_dual" };
139 	int usb_erratum_a006261_off = -1;
140 	int usb_erratum_a007075_off = -1;
141 	int usb_erratum_a007792_off = -1;
142 	int usb_erratum_a005697_off = -1;
143 	int usb_erratum_a008751_off = -1;
144 	int usb_mode_off = -1;
145 	int usb_phy_off = -1;
146 	char str[5];
147 	int i, j;
148 	int ret;
149 
150 	for (i = 1; i <= CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
151 		const char *dr_mode_type = NULL;
152 		const char *dr_phy_type = NULL;
153 		int mode_idx = -1, phy_idx = -1;
154 
155 		snprintf(str, 5, "%s%d", "usb", i);
156 		if (hwconfig(str)) {
157 			for (j = 0; j < ARRAY_SIZE(modes); j++) {
158 				if (hwconfig_subarg_cmp(str, "dr_mode",
159 							modes[j])) {
160 					mode_idx = j;
161 					break;
162 				}
163 			}
164 
165 			for (j = 0; j < ARRAY_SIZE(phys); j++) {
166 				if (hwconfig_subarg_cmp(str, "phy_type",
167 							phys[j])) {
168 					phy_idx = j;
169 					break;
170 				}
171 			}
172 
173 			if (mode_idx < 0 && phy_idx < 0) {
174 				printf("WARNING: invalid phy or mode\n");
175 				return;
176 			}
177 
178 			if (mode_idx > -1)
179 				dr_mode_type = modes[mode_idx];
180 
181 			if (phy_idx > -1)
182 				dr_phy_type = phys[phy_idx];
183 		}
184 
185 		if (has_dual_phy())
186 			dr_phy_type = phys[2];
187 
188 		usb_mode_off = fdt_fixup_usb_mode_phy_type(blob,
189 							   dr_mode_type, NULL,
190 							   usb_mode_off);
191 
192 		if (usb_mode_off < 0)
193 			return;
194 
195 		usb_phy_off = fdt_fixup_usb_mode_phy_type(blob,
196 							  NULL, dr_phy_type,
197 							  usb_phy_off);
198 
199 		if (usb_phy_off < 0)
200 			return;
201 
202 		ret = fsl_fdt_fixup_erratum(&usb_erratum_a006261_off, blob,
203 					    CHIPIDEA_USB2, "a006261",
204 					    has_erratum_a006261);
205 		if (ret == -ENOSPC)
206 			return;
207 		ret = fsl_fdt_fixup_erratum(&usb_erratum_a007075_off, blob,
208 					    CHIPIDEA_USB2, "a007075",
209 					    has_erratum_a007075);
210 		if (ret == -ENOSPC)
211 			return;
212 		ret = fsl_fdt_fixup_erratum(&usb_erratum_a007792_off, blob,
213 					    CHIPIDEA_USB2, "a007792",
214 					    has_erratum_a007792);
215 		if (ret == -ENOSPC)
216 			return;
217 		ret = fsl_fdt_fixup_erratum(&usb_erratum_a005697_off, blob,
218 					    CHIPIDEA_USB2, "a005697",
219 					    has_erratum_a005697);
220 		if (ret == -ENOSPC)
221 			return;
222 		ret = fsl_fdt_fixup_erratum(&usb_erratum_a008751_off, blob,
223 					    SNPS_DWC3, "a008751",
224 					    has_erratum_a008751);
225 		if (ret == -ENOSPC)
226 			return;
227 
228 	}
229 }
230