xref: /openbmc/u-boot/drivers/usb/musb-new/ti-musb.c (revision 522e0354)
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