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