1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * MISC driver for TI MUSB Glue.
4 *
5 * (C) Copyright 2016
6 * Texas Instruments Incorporated, <www.ti.com>
7 */
8 #include <common.h>
9 #include <command.h>
10 #include <console.h>
11 #include <dm.h>
12 #include <linux/usb/otg.h>
13 #include <dm/device-internal.h>
14 #include <dm/lists.h>
15
16 #include <asm/io.h>
17 #include <asm/omap_musb.h>
18 #include "musb_uboot.h"
19
20 DECLARE_GLOBAL_DATA_PTR;
21
22 #if CONFIG_IS_ENABLED(DM_USB)
23 /* USB 2.0 PHY Control */
24 #define CM_PHY_PWRDN (1 << 0)
25 #define CM_PHY_OTG_PWRDN (1 << 1)
26 #define OTGVDET_EN (1 << 19)
27 #define OTGSESSENDEN (1 << 20)
28
29 #define AM335X_USB0_CTRL 0x0
30 #define AM335X_USB1_CTRL 0x8
31
ti_musb_set_phy_power(struct udevice * dev,u8 on)32 static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
33 {
34 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
35
36 if (!platdata->ctrl_mod_base)
37 return;
38
39 if (on) {
40 clrsetbits_le32(platdata->ctrl_mod_base,
41 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
42 OTGVDET_EN | OTGSESSENDEN);
43 } else {
44 clrsetbits_le32(platdata->ctrl_mod_base, 0,
45 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
46 }
47 }
48
49 #if CONFIG_IS_ENABLED(OF_CONTROL)
50
ti_musb_get_usb_index(int node)51 static int ti_musb_get_usb_index(int node)
52 {
53 const void *fdt = gd->fdt_blob;
54 int i = 0;
55 char path[64];
56 const char *alias_path;
57 char alias[16];
58
59 fdt_get_path(fdt, node, path, sizeof(path));
60
61 do {
62 snprintf(alias, sizeof(alias), "usb%d", i);
63 alias_path = fdt_get_alias(fdt, alias);
64 if (alias_path == NULL) {
65 debug("USB index not found\n");
66 return -ENOENT;
67 }
68
69 if (!strcmp(path, alias_path))
70 return i;
71
72 i++;
73 } while (alias_path);
74
75 return -ENOENT;
76 }
77
ti_musb_ofdata_to_platdata(struct udevice * dev)78 static int ti_musb_ofdata_to_platdata(struct udevice *dev)
79 {
80 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
81 const void *fdt = gd->fdt_blob;
82 int node = dev_of_offset(dev);
83 int phys;
84 int ctrl_mod;
85 int usb_index;
86 struct musb_hdrc_config *musb_config;
87
88 platdata->base = (void *)devfdt_get_addr_index(dev, 1);
89
90 phys = fdtdec_lookup_phandle(fdt, node, "phys");
91 ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
92 platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
93 usb_index = ti_musb_get_usb_index(node);
94 switch (usb_index) {
95 case 1:
96 platdata->ctrl_mod_base += AM335X_USB1_CTRL;
97 break;
98 case 0:
99 platdata->ctrl_mod_base += AM335X_USB0_CTRL;
100 break;
101 default:
102 break;
103 }
104
105 musb_config = malloc(sizeof(struct musb_hdrc_config));
106 memset(musb_config, 0, sizeof(struct musb_hdrc_config));
107
108 musb_config->multipoint = fdtdec_get_int(fdt, node,
109 "mentor,multipoint", -1);
110 if (musb_config->multipoint < 0) {
111 pr_err("MUSB multipoint DT entry missing\n");
112 return -ENOENT;
113 }
114
115 musb_config->dyn_fifo = 1;
116
117 musb_config->num_eps = fdtdec_get_int(fdt, node, "mentor,num-eps",
118 -1);
119 if (musb_config->num_eps < 0) {
120 pr_err("MUSB num-eps DT entry missing\n");
121 return -ENOENT;
122 }
123
124 musb_config->ram_bits = fdtdec_get_int(fdt, node, "mentor,ram-bits",
125 -1);
126 if (musb_config->ram_bits < 0) {
127 pr_err("MUSB ram-bits DT entry missing\n");
128 return -ENOENT;
129 }
130
131 platdata->plat.config = musb_config;
132
133 platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
134 if (platdata->plat.power < 0) {
135 pr_err("MUSB mentor,power DT entry missing\n");
136 return -ENOENT;
137 }
138
139 platdata->plat.platform_ops = &musb_dsps_ops;
140
141 return 0;
142 }
143 #endif
144
ti_musb_host_probe(struct udevice * dev)145 static 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 int ret;
151
152 priv->desc_before_addr = true;
153
154 host->host = musb_init_controller(&platdata->plat,
155 NULL,
156 platdata->base);
157 if (!host->host)
158 return -EIO;
159
160 ti_musb_set_phy_power(dev, 1);
161 ret = musb_lowlevel_init(host);
162
163 return ret;
164 }
165
ti_musb_host_remove(struct udevice * dev)166 static int ti_musb_host_remove(struct udevice *dev)
167 {
168 struct musb_host_data *host = dev_get_priv(dev);
169
170 musb_stop(host->host);
171 ti_musb_set_phy_power(dev, 0);
172
173 return 0;
174 }
175
176 #if CONFIG_IS_ENABLED(OF_CONTROL)
ti_musb_host_ofdata_to_platdata(struct udevice * dev)177 static 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(dev);
182 int ret;
183
184 ret = ti_musb_ofdata_to_platdata(dev);
185 if (ret) {
186 pr_err("platdata dt parse error\n");
187 return ret;
188 }
189
190 platdata->plat.mode = MUSB_HOST;
191
192 return 0;
193 }
194 #endif
195
196 U_BOOT_DRIVER(ti_musb_host) = {
197 .name = "ti-musb-host",
198 .id = UCLASS_USB,
199 #if CONFIG_IS_ENABLED(OF_CONTROL)
200 .ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
201 #endif
202 .probe = ti_musb_host_probe,
203 .remove = ti_musb_host_remove,
204 .ops = &musb_usb_ops,
205 .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
206 .priv_auto_alloc_size = sizeof(struct musb_host_data),
207 };
208
209 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
210 struct ti_musb_peripheral {
211 struct musb *periph;
212 };
213
214 #if CONFIG_IS_ENABLED(OF_CONTROL)
ti_musb_peripheral_ofdata_to_platdata(struct udevice * dev)215 static int ti_musb_peripheral_ofdata_to_platdata(struct udevice *dev)
216 {
217 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
218 const void *fdt = gd->fdt_blob;
219 int node = dev_of_offset(dev);
220 int ret;
221
222 ret = ti_musb_ofdata_to_platdata(dev);
223 if (ret) {
224 pr_err("platdata dt parse error\n");
225 return ret;
226 }
227 platdata->plat.mode = MUSB_PERIPHERAL;
228
229 return 0;
230 }
231 #endif
232
dm_usb_gadget_handle_interrupts(struct udevice * dev)233 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
234 {
235 struct ti_musb_peripheral *priv = dev_get_priv(dev);
236
237 priv->periph->isr(0, priv->periph);
238
239 return 0;
240 }
241
ti_musb_peripheral_probe(struct udevice * dev)242 static int ti_musb_peripheral_probe(struct udevice *dev)
243 {
244 struct ti_musb_peripheral *priv = dev_get_priv(dev);
245 struct ti_musb_platdata *platdata = dev_get_platdata(dev);
246 int ret;
247
248 priv->periph = musb_init_controller(&platdata->plat,
249 NULL,
250 platdata->base);
251 if (!priv->periph)
252 return -EIO;
253
254 ti_musb_set_phy_power(dev, 1);
255 musb_gadget_setup(priv->periph);
256 return usb_add_gadget_udc((struct device *)dev, &priv->periph->g);
257 }
258
ti_musb_peripheral_remove(struct udevice * dev)259 static int ti_musb_peripheral_remove(struct udevice *dev)
260 {
261 struct ti_musb_peripheral *priv = dev_get_priv(dev);
262
263 usb_del_gadget_udc(&priv->periph->g);
264 ti_musb_set_phy_power(dev, 0);
265
266 return 0;
267 }
268
269 U_BOOT_DRIVER(ti_musb_peripheral) = {
270 .name = "ti-musb-peripheral",
271 .id = UCLASS_USB_GADGET_GENERIC,
272 #if CONFIG_IS_ENABLED(OF_CONTROL)
273 .ofdata_to_platdata = ti_musb_peripheral_ofdata_to_platdata,
274 #endif
275 .probe = ti_musb_peripheral_probe,
276 .remove = ti_musb_peripheral_remove,
277 .ops = &musb_usb_ops,
278 .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
279 .priv_auto_alloc_size = sizeof(struct ti_musb_peripheral),
280 .flags = DM_FLAG_PRE_RELOC,
281 };
282 #endif
283
284 #if CONFIG_IS_ENABLED(OF_CONTROL)
ti_musb_wrapper_bind(struct udevice * parent)285 static int ti_musb_wrapper_bind(struct udevice *parent)
286 {
287 const void *fdt = gd->fdt_blob;
288 int node;
289 int ret;
290
291 for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
292 node = fdt_next_subnode(fdt, node)) {
293 struct udevice *dev;
294 const char *name = fdt_get_name(fdt, node, NULL);
295 enum usb_dr_mode dr_mode;
296 struct driver *drv;
297
298 if (strncmp(name, "usb@", 4))
299 continue;
300
301 dr_mode = usb_get_dr_mode(node);
302 switch (dr_mode) {
303 case USB_DR_MODE_PERIPHERAL:
304 /* Bind MUSB device */
305 ret = device_bind_driver_to_node(parent,
306 "ti-musb-peripheral",
307 name,
308 offset_to_ofnode(node),
309 &dev);
310 if (ret)
311 pr_err("musb - not able to bind usb peripheral node\n");
312 break;
313 case USB_DR_MODE_HOST:
314 /* Bind MUSB host */
315 ret = device_bind_driver_to_node(parent,
316 "ti-musb-host",
317 name,
318 offset_to_ofnode(node),
319 &dev);
320 if (ret)
321 pr_err("musb - not able to bind usb host node\n");
322 break;
323 default:
324 break;
325 };
326 }
327 return 0;
328 }
329
330 static const struct udevice_id ti_musb_ids[] = {
331 { .compatible = "ti,am33xx-usb" },
332 { }
333 };
334
335 U_BOOT_DRIVER(ti_musb_wrapper) = {
336 .name = "ti-musb-wrapper",
337 .id = UCLASS_MISC,
338 .of_match = ti_musb_ids,
339 .bind = ti_musb_wrapper_bind,
340 };
341 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
342
343 #endif /* CONFIG_IS_ENABLED(DM_USB) */
344