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Mugunthan V N28b8d5f2016-11-17 14:38:08 +05301/*
2 * MISC driver for TI MUSB Glue.
3 *
4 * (C) Copyright 2016
5 * Texas Instruments Incorporated, <www.ti.com>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9#include <common.h>
10#include <command.h>
11#include <console.h>
12#include <dm.h>
13#include <linux/usb/otg.h>
14#include <dm/device-internal.h>
15#include <dm/lists.h>
16
Mugunthan V Nae6acf92016-11-17 14:38:11 +053017#include <asm/io.h>
18#include <asm/omap_musb.h>
19#include "musb_uboot.h"
20
Mugunthan V N28b8d5f2016-11-17 14:38:08 +053021DECLARE_GLOBAL_DATA_PTR;
22
23#ifdef CONFIG_DM_USB
24
Mugunthan V Nae6acf92016-11-17 14:38:11 +053025/* USB 2.0 PHY Control */
26#define CM_PHY_PWRDN (1 << 0)
27#define CM_PHY_OTG_PWRDN (1 << 1)
28#define OTGVDET_EN (1 << 19)
29#define OTGSESSENDEN (1 << 20)
30
31#define AM335X_USB1_CTRL 0x8
32
33struct ti_musb_platdata {
34 void *base;
35 void *ctrl_mod_base;
36 struct musb_hdrc_platform_data plat;
37 struct musb_hdrc_config musb_config;
38 struct omap_musb_board_data otg_board_data;
39};
40
41static int ti_musb_get_usb_index(int node)
42{
43 const void *fdt = gd->fdt_blob;
44 int i = 0;
45 char path[64];
46 const char *alias_path;
47 char alias[16];
48
49 fdt_get_path(fdt, node, path, sizeof(path));
50
51 do {
52 snprintf(alias, sizeof(alias), "usb%d", i);
53 alias_path = fdt_get_alias(fdt, alias);
54 if (alias_path == NULL) {
55 debug("USB index not found\n");
56 return -ENOENT;
57 }
58
59 if (!strcmp(path, alias_path))
60 return i;
61
62 i++;
63 } while (alias_path);
64
65 return -ENOENT;
66}
67
68static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
69{
70 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
71
72 if (on) {
73 clrsetbits_le32(platdata->ctrl_mod_base,
74 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
75 OTGVDET_EN | OTGSESSENDEN);
76 } else {
77 clrsetbits_le32(platdata->ctrl_mod_base, 0,
78 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
79 }
80}
81
82static int ti_musb_ofdata_to_platdata(struct udevice *dev)
83{
84 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
85 const void *fdt = gd->fdt_blob;
86 int node = dev->of_offset;
87 int phys;
88 int ctrl_mod;
89 int usb_index;
90
91 platdata->base = (void *)dev_get_addr_index(dev, 1);
92
93 phys = fdtdec_lookup_phandle(fdt, node, "phys");
94 ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
95 platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
96 usb_index = ti_musb_get_usb_index(node);
97 switch (usb_index) {
98 case 1:
99 platdata->ctrl_mod_base += AM335X_USB1_CTRL;
100 case 0:
101 default:
102 break;
103 }
104
105 platdata->musb_config.multipoint = fdtdec_get_int(fdt, node,
106 "mentor,multipoint",
107 -1);
108 if (platdata->musb_config.multipoint < 0) {
109 error("MUSB multipoint DT entry missing\n");
110 return -ENOENT;
111 }
112
113 platdata->musb_config.dyn_fifo = 1;
114
115 platdata->musb_config.num_eps = fdtdec_get_int(fdt, node,
116 "mentor,num-eps", -1);
117 if (platdata->musb_config.num_eps < 0) {
118 error("MUSB num-eps DT entry missing\n");
119 return -ENOENT;
120 }
121
122 platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node,
123 "mentor,ram-bits", -1);
124 if (platdata->musb_config.ram_bits < 0) {
125 error("MUSB ram-bits DT entry missing\n");
126 return -ENOENT;
127 }
128
129 platdata->otg_board_data.set_phy_power = ti_musb_set_phy_power;
130 platdata->otg_board_data.dev = dev;
131 platdata->plat.config = &platdata->musb_config;
132
133 platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
134 if (platdata->plat.power < 0) {
135 error("MUSB mentor,power DT entry missing\n");
136 return -ENOENT;
137 }
138
139 platdata->plat.platform_ops = &musb_dsps_ops;
140 platdata->plat.board_data = &platdata->otg_board_data;
141
142 return 0;
143}
144
145static int ti_musb_host_probe(struct udevice *dev)
146{
147 struct musb_host_data *host = dev_get_priv(dev);
148 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
149 struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
150 struct omap_musb_board_data *otg_board_data;
151 int ret;
152
153 priv->desc_before_addr = true;
154
155 otg_board_data = &platdata->otg_board_data;
156
157 host->host = musb_init_controller(&platdata->plat,
158 (struct device *)otg_board_data,
159 platdata->base);
160 if (!host->host)
161 return -EIO;
162
163 ret = musb_lowlevel_init(host);
164
165 return ret;
166}
167
168static int ti_musb_host_remove(struct udevice *dev)
169{
170 struct musb_host_data *host = dev_get_priv(dev);
171
172 musb_stop(host->host);
173
174 return 0;
175}
176
177static int ti_musb_host_ofdata_to_platdata(struct udevice *dev)
178{
179 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
180 const void *fdt = gd->fdt_blob;
181 int node = dev->of_offset;
182 int ret;
183
184 ret = ti_musb_ofdata_to_platdata(dev);
185 if (ret) {
186 error("platdata dt parse error\n");
187 return ret;
188 }
189
190 platdata->plat.mode = MUSB_HOST;
191
192 return 0;
193}
194
195U_BOOT_DRIVER(ti_musb_host) = {
196 .name = "ti-musb-host",
197 .id = UCLASS_USB,
198 .ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
199 .probe = ti_musb_host_probe,
200 .remove = ti_musb_host_remove,
201 .ops = &musb_usb_ops,
202 .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
203 .priv_auto_alloc_size = sizeof(struct musb_host_data),
204};
205
Mugunthan V N28b8d5f2016-11-17 14:38:08 +0530206static int ti_musb_wrapper_bind(struct udevice *parent)
207{
208 const void *fdt = gd->fdt_blob;
209 int node;
210 int ret;
211
212 for (node = fdt_first_subnode(fdt, parent->of_offset); node > 0;
213 node = fdt_next_subnode(fdt, node)) {
214 struct udevice *dev;
215 const char *name = fdt_get_name(fdt, node, NULL);
216 enum usb_dr_mode dr_mode;
217 struct driver *drv;
218
219 if (strncmp(name, "usb@", 4))
220 continue;
221
222 dr_mode = usb_get_dr_mode(node);
223 switch (dr_mode) {
224 case USB_DR_MODE_PERIPHERAL:
225 /* Bind MUSB device */
226 break;
227 case USB_DR_MODE_HOST:
228 /* Bind MUSB host */
Mugunthan V Nae6acf92016-11-17 14:38:11 +0530229 ret = device_bind_driver_to_node(parent, "ti-musb-host",
230 name, node, &dev);
231 if (ret) {
232 error("musb - not able to bind usb host node\n");
233 return ret;
234 }
Mugunthan V N28b8d5f2016-11-17 14:38:08 +0530235 break;
236 default:
237 break;
238 };
239 }
240 return 0;
241}
242
243static const struct udevice_id ti_musb_ids[] = {
244 { .compatible = "ti,am33xx-usb" },
245 { }
246};
247
248U_BOOT_DRIVER(ti_musb_wrapper) = {
249 .name = "ti-musb-wrapper",
250 .id = UCLASS_MISC,
251 .of_match = ti_musb_ids,
252 .bind = ti_musb_wrapper_bind,
253};
254
255#endif /* CONFIG_DM_USB */