1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2005-2007 by Texas Instruments
4 * Some code has been taken from tusb6010.c
5 * Copyrights for that are attributable to:
6 * Copyright (C) 2006 Nokia Corporation
7 * Tony Lindgren <tony@atomide.com>
8 *
9 * This file is part of the Inventra Controller Driver for Linux.
10 */
11 #include <common.h>
12 #include <dm.h>
13 #include <log.h>
14 #include <serial.h>
15 #include <dm/device-internal.h>
16 #include <dm/device_compat.h>
17 #include <dm/lists.h>
18 #include <linux/err.h>
19 #include <linux/usb/otg.h>
20 #include <asm/global_data.h>
21 #include <asm/omap_common.h>
22 #include <asm/omap_musb.h>
23 #include <twl4030.h>
24 #include <twl6030.h>
25 #include "linux-compat.h"
26 #include "musb_core.h"
27 #include "omap2430.h"
28 #include "musb_uboot.h"
29
omap2430_low_level_exit(struct musb * musb)30 static inline void omap2430_low_level_exit(struct musb *musb)
31 {
32 u32 l;
33
34 /* in any role */
35 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
36 l |= ENABLEFORCE; /* enable MSTANDBY */
37 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
38 }
39
omap2430_low_level_init(struct musb * musb)40 static inline void omap2430_low_level_init(struct musb *musb)
41 {
42 u32 l;
43
44 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
45 l &= ~ENABLEFORCE; /* disable MSTANDBY */
46 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
47 }
48
49
omap2430_musb_init(struct musb * musb)50 static int omap2430_musb_init(struct musb *musb)
51 {
52 u32 l;
53 int status = 0;
54 unsigned long int start;
55
56 struct omap_musb_board_data *data =
57 (struct omap_musb_board_data *)musb->controller;
58
59 /* Reset the controller */
60 musb_writel(musb->mregs, OTG_SYSCONFIG, SOFTRST);
61
62 start = get_timer(0);
63
64 while (1) {
65 l = musb_readl(musb->mregs, OTG_SYSCONFIG);
66 if ((l & SOFTRST) == 0)
67 break;
68
69 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
70 dev_err(musb->controller, "MUSB reset is taking too long\n");
71 return -ENODEV;
72 }
73 }
74
75 l = musb_readl(musb->mregs, OTG_INTERFSEL);
76
77 if (data->interface_type == MUSB_INTERFACE_UTMI) {
78 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
79 l &= ~ULPI_12PIN; /* Disable ULPI */
80 l |= UTMI_8BIT; /* Enable UTMI */
81 } else {
82 l |= ULPI_12PIN;
83 }
84
85 musb_writel(musb->mregs, OTG_INTERFSEL, l);
86
87 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
88 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
89 musb_readl(musb->mregs, OTG_REVISION),
90 musb_readl(musb->mregs, OTG_SYSCONFIG),
91 musb_readl(musb->mregs, OTG_SYSSTATUS),
92 musb_readl(musb->mregs, OTG_INTERFSEL),
93 musb_readl(musb->mregs, OTG_SIMENABLE));
94 return 0;
95
96 err1:
97 return status;
98 }
99
omap2430_musb_enable(struct musb * musb)100 static int omap2430_musb_enable(struct musb *musb)
101 {
102 #ifdef CONFIG_TWL4030_USB
103 if (twl4030_usb_ulpi_init()) {
104 serial_printf("ERROR: %s Could not initialize PHY\n",
105 __PRETTY_FUNCTION__);
106 }
107 #endif
108
109 #ifdef CONFIG_TWL6030_POWER
110 twl6030_usb_device_settings();
111 #endif
112
113 #ifdef CONFIG_OMAP44XX
114 u32 *usbotghs_control = (u32 *)((*ctrl)->control_usbotghs_ctrl);
115 *usbotghs_control = USBOTGHS_CONTROL_AVALID |
116 USBOTGHS_CONTROL_VBUSVALID | USBOTGHS_CONTROL_IDDIG;
117 #endif
118
119 return 0;
120 }
121
omap2430_musb_disable(struct musb * musb)122 static void omap2430_musb_disable(struct musb *musb)
123 {
124
125 }
126
omap2430_musb_exit(struct musb * musb)127 static int omap2430_musb_exit(struct musb *musb)
128 {
129 del_timer_sync(&musb_idle_timer);
130
131 omap2430_low_level_exit(musb);
132
133 return 0;
134 }
135
136 const struct musb_platform_ops omap2430_ops = {
137 .init = omap2430_musb_init,
138 .exit = omap2430_musb_exit,
139 .enable = omap2430_musb_enable,
140 .disable = omap2430_musb_disable,
141 };
142
143 #if CONFIG_IS_ENABLED(DM_USB)
144
145 struct omap2430_musb_plat {
146 void *base;
147 void *ctrl_mod_base;
148 struct musb_hdrc_platform_data plat;
149 struct musb_hdrc_config musb_config;
150 struct omap_musb_board_data otg_board_data;
151 };
152
omap2430_musb_of_to_plat(struct udevice * dev)153 static int omap2430_musb_of_to_plat(struct udevice *dev)
154 {
155 struct omap2430_musb_plat *plat = dev_get_plat(dev);
156 const void *fdt = gd->fdt_blob;
157 int node = dev_of_offset(dev);
158
159 plat->base = (void *)dev_read_addr_ptr(dev);
160
161 plat->musb_config.multipoint = fdtdec_get_int(fdt, node, "multipoint",
162 -1);
163 if (plat->musb_config.multipoint < 0) {
164 pr_err("MUSB multipoint DT entry missing\n");
165 return -ENOENT;
166 }
167
168 plat->musb_config.dyn_fifo = 1;
169 plat->musb_config.num_eps = fdtdec_get_int(fdt, node, "num-eps", -1);
170 if (plat->musb_config.num_eps < 0) {
171 pr_err("MUSB num-eps DT entry missing\n");
172 return -ENOENT;
173 }
174
175 plat->musb_config.ram_bits = fdtdec_get_int(fdt, node, "ram-bits", -1);
176 if (plat->musb_config.ram_bits < 0) {
177 pr_err("MUSB ram-bits DT entry missing\n");
178 return -ENOENT;
179 }
180
181 plat->plat.power = fdtdec_get_int(fdt, node, "power", -1);
182 if (plat->plat.power < 0) {
183 pr_err("MUSB power DT entry missing\n");
184 return -ENOENT;
185 }
186
187 plat->otg_board_data.interface_type = fdtdec_get_int(fdt, node,
188 "interface-type",
189 -1);
190 if (plat->otg_board_data.interface_type < 0) {
191 pr_err("MUSB interface-type DT entry missing\n");
192 return -ENOENT;
193 }
194
195 #if 0 /* In a perfect world, mode would be set to OTG, mode 3 from DT */
196 plat->plat.mode = fdtdec_get_int(fdt, node, "mode", -1);
197 if (plat->plat.mode < 0) {
198 pr_err("MUSB mode DT entry missing\n");
199 return -ENOENT;
200 }
201 #else /* MUSB_OTG, it doesn't work */
202 #ifdef CONFIG_USB_MUSB_HOST /* Host seems to be the only option that works */
203 plat->plat.mode = MUSB_HOST;
204 #else /* For that matter, MUSB_PERIPHERAL doesn't either */
205 plat->plat.mode = MUSB_PERIPHERAL;
206 #endif
207 #endif
208 plat->otg_board_data.dev = dev;
209 plat->plat.config = &plat->musb_config;
210 plat->plat.platform_ops = &omap2430_ops;
211 plat->plat.board_data = &plat->otg_board_data;
212 return 0;
213 }
214
omap2430_musb_probe(struct udevice * dev)215 static int omap2430_musb_probe(struct udevice *dev)
216 {
217 #ifdef CONFIG_USB_MUSB_HOST
218 struct musb_host_data *host = dev_get_priv(dev);
219 #else
220 struct musb *musbp;
221 #endif
222 struct omap2430_musb_plat *plat = dev_get_plat(dev);
223 struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
224 struct omap_musb_board_data *otg_board_data;
225 int ret = 0;
226 void *base = dev_read_addr_ptr(dev);
227
228 priv->desc_before_addr = true;
229
230 otg_board_data = &plat->otg_board_data;
231
232 #ifdef CONFIG_USB_MUSB_HOST
233 host->host = musb_init_controller(&plat->plat,
234 (struct device *)otg_board_data,
235 plat->base);
236 if (!host->host) {
237 return -EIO;
238 }
239
240 ret = musb_lowlevel_init(host);
241 #else
242 musbp = musb_register(&plat->plat, (struct device *)otg_board_data,
243 plat->base);
244 if (IS_ERR_OR_NULL(musbp))
245 return -EINVAL;
246 #endif
247 return ret;
248 }
249
omap2430_musb_remove(struct udevice * dev)250 static int omap2430_musb_remove(struct udevice *dev)
251 {
252 struct musb_host_data *host = dev_get_priv(dev);
253
254 musb_stop(host->host);
255
256 return 0;
257 }
258
259 static const struct udevice_id omap2430_musb_ids[] = {
260 { .compatible = "ti,omap3-musb" },
261 { .compatible = "ti,omap4-musb" },
262 { }
263 };
264
265 U_BOOT_DRIVER(omap2430_musb) = {
266 .name = "omap2430-musb",
267 #ifdef CONFIG_USB_MUSB_HOST
268 .id = UCLASS_USB,
269 #else
270 .id = UCLASS_USB_GADGET_GENERIC,
271 #endif
272 .of_match = omap2430_musb_ids,
273 .of_to_plat = omap2430_musb_of_to_plat,
274 .probe = omap2430_musb_probe,
275 .remove = omap2430_musb_remove,
276 #ifdef CONFIG_USB_MUSB_HOST
277 .ops = &musb_usb_ops,
278 #endif
279 .plat_auto = sizeof(struct omap2430_musb_plat),
280 .priv_auto = sizeof(struct musb_host_data),
281 };
282
283 #endif /* CONFIG_IS_ENABLED(DM_USB) */
284