1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2016 MediaTek Inc.
4 *
5 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
6 */
7
8 #include <common.h>
9 #include <dm/lists.h>
10 #include <linux/iopoll.h>
11
12 #include "mtu3.h"
13 #include "mtu3_dr.h"
14
ssusb_set_force_mode(struct ssusb_mtk * ssusb,enum mtu3_dr_force_mode mode)15 void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
16 enum mtu3_dr_force_mode mode)
17 {
18 u32 value;
19
20 value = mtu3_readl(ssusb->ippc_base, SSUSB_U2_CTRL(0));
21 switch (mode) {
22 case MTU3_DR_FORCE_DEVICE:
23 value |= SSUSB_U2_PORT_FORCE_IDDIG | SSUSB_U2_PORT_RG_IDDIG;
24 break;
25 case MTU3_DR_FORCE_HOST:
26 value |= SSUSB_U2_PORT_FORCE_IDDIG;
27 value &= ~SSUSB_U2_PORT_RG_IDDIG;
28 break;
29 case MTU3_DR_FORCE_NONE:
30 value &= ~(SSUSB_U2_PORT_FORCE_IDDIG | SSUSB_U2_PORT_RG_IDDIG);
31 break;
32 default:
33 return;
34 }
35 mtu3_writel(ssusb->ippc_base, SSUSB_U2_CTRL(0), value);
36 }
37
38 /* u2-port0 should be powered on and enabled; */
ssusb_check_clocks(struct ssusb_mtk * ssusb,u32 ex_clks)39 int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
40 {
41 void __iomem *ibase = ssusb->ippc_base;
42 u32 value, check_val;
43 int ret;
44
45 check_val = ex_clks | SSUSB_SYS125_RST_B_STS | SSUSB_SYSPLL_STABLE |
46 SSUSB_REF_RST_B_STS;
47
48 ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value,
49 ((value & check_val) == check_val), 10000);
50 if (ret) {
51 dev_err(ssusb->dev, "clks of sts1 are not stable!\n");
52 return ret;
53 }
54
55 ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS2, value,
56 (value & SSUSB_U2_MAC_SYS_RST_B_STS), 10000);
57 if (ret) {
58 dev_err(ssusb->dev, "mac2 clock is not stable\n");
59 return ret;
60 }
61
62 return 0;
63 }
64
ssusb_phy_setup(struct ssusb_mtk * ssusb)65 int ssusb_phy_setup(struct ssusb_mtk *ssusb)
66 {
67 struct udevice *dev = ssusb->dev;
68 struct phy_bulk *phys = &ssusb->phys;
69 int ret;
70
71 ret = generic_phy_get_bulk(dev, phys);
72 if (ret)
73 return ret;
74
75 ret = generic_phy_init_bulk(phys);
76 if (ret)
77 return ret;
78
79 ret = generic_phy_power_on_bulk(phys);
80 if (ret)
81 generic_phy_exit_bulk(phys);
82
83 return ret;
84 }
85
ssusb_phy_shutdown(struct ssusb_mtk * ssusb)86 void ssusb_phy_shutdown(struct ssusb_mtk *ssusb)
87 {
88 generic_phy_power_off_bulk(&ssusb->phys);
89 generic_phy_exit_bulk(&ssusb->phys);
90 }
91
ssusb_rscs_init(struct ssusb_mtk * ssusb)92 static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
93 {
94 int ret = 0;
95
96 ret = regulator_set_enable(ssusb->vusb33_supply, true);
97 if (ret < 0 && ret != -ENOSYS) {
98 dev_err(ssusb->dev, "failed to enable vusb33\n");
99 goto vusb33_err;
100 }
101
102 ret = clk_enable_bulk(&ssusb->clks);
103 if (ret)
104 goto clks_err;
105
106 ret = ssusb_phy_setup(ssusb);
107 if (ret) {
108 dev_err(ssusb->dev, "failed to setup phy\n");
109 goto phy_err;
110 }
111
112 return 0;
113
114 phy_err:
115 clk_disable_bulk(&ssusb->clks);
116 clks_err:
117 regulator_set_enable(ssusb->vusb33_supply, false);
118 vusb33_err:
119 return ret;
120 }
121
ssusb_rscs_exit(struct ssusb_mtk * ssusb)122 static void ssusb_rscs_exit(struct ssusb_mtk *ssusb)
123 {
124 clk_disable_bulk(&ssusb->clks);
125 regulator_set_enable(ssusb->vusb33_supply, false);
126 ssusb_phy_shutdown(ssusb);
127 }
128
ssusb_ip_sw_reset(struct ssusb_mtk * ssusb)129 static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb)
130 {
131 /* reset whole ip (xhci & u3d) */
132 mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
133 udelay(1);
134 mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
135 }
136
get_ssusb_rscs(struct udevice * dev,struct ssusb_mtk * ssusb)137 static int get_ssusb_rscs(struct udevice *dev, struct ssusb_mtk *ssusb)
138 {
139 struct udevice *child;
140 int ret;
141
142 ret = device_get_supply_regulator(dev, "vusb33-supply",
143 &ssusb->vusb33_supply);
144 if (ret) /* optional, ignore error */
145 dev_warn(dev, "can't get optional vusb33 %d\n", ret);
146
147 ret = device_get_supply_regulator(dev, "vbus-supply",
148 &ssusb->vbus_supply);
149 if (ret) /* optional, ignore error */
150 dev_warn(dev, "can't get optional vbus regulator %d!\n", ret);
151
152 ret = clk_get_bulk(dev, &ssusb->clks);
153 if (ret) {
154 dev_err(dev, "failed to get clocks %d!\n", ret);
155 return ret;
156 }
157
158 ssusb->ippc_base = devfdt_remap_addr_name(dev, "ippc");
159 if (!ssusb->ippc_base) {
160 dev_err(dev, "error mapping memory for ippc\n");
161 return -ENODEV;
162 }
163
164 ret = device_find_first_child(dev, &child);
165 if (ret || !child) {
166 dev_err(dev, "failed to get child %d!\n", ret);
167 return ret;
168 }
169
170 ssusb->mac_base = devfdt_remap_addr_name(child, "mac");
171 if (!ssusb->mac_base) {
172 dev_err(dev, "error mapping memory for mac\n");
173 return -ENODEV;
174 }
175
176 ssusb->dr_mode = usb_get_dr_mode(dev_ofnode(child));
177
178 if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN ||
179 ssusb->dr_mode == USB_DR_MODE_OTG)
180 ssusb->dr_mode = USB_DR_MODE_PERIPHERAL;
181
182 if (IS_ENABLED(CONFIG_USB_MTU3_GADGET))
183 ssusb->dr_mode = USB_DR_MODE_PERIPHERAL;
184 else if (IS_ENABLED(CONFIG_USB_MTU3_HOST))
185 ssusb->dr_mode = USB_DR_MODE_HOST;
186
187 dev_info(dev, "dr_mode: %d, ippc: 0x%p, mac: 0x%p\n",
188 ssusb->dr_mode, ssusb->ippc_base, ssusb->mac_base);
189
190 return 0;
191 }
192
mtu3_probe(struct udevice * dev)193 static int mtu3_probe(struct udevice *dev)
194 {
195 struct ssusb_mtk *ssusb = dev_get_priv(dev);
196 int ret = -ENOMEM;
197
198 ssusb->dev = dev;
199
200 ret = get_ssusb_rscs(dev, ssusb);
201 if (ret)
202 return ret;
203
204 ret = ssusb_rscs_init(ssusb);
205 if (ret)
206 return ret;
207
208 ssusb_ip_sw_reset(ssusb);
209
210 return 0;
211 }
212
mtu3_remove(struct udevice * dev)213 static int mtu3_remove(struct udevice *dev)
214 {
215 struct ssusb_mtk *ssusb = dev_to_ssusb(dev);
216
217 ssusb_rscs_exit(ssusb);
218 return 0;
219 }
220
221 static const struct udevice_id ssusb_of_match[] = {
222 {.compatible = "mediatek,ssusb",},
223 {},
224 };
225
226 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
dm_usb_gadget_handle_interrupts(struct udevice * dev)227 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
228 {
229 struct mtu3 *mtu = dev_get_priv(dev);
230
231 mtu3_irq(0, mtu);
232
233 return 0;
234 }
235
mtu3_gadget_probe(struct udevice * dev)236 static int mtu3_gadget_probe(struct udevice *dev)
237 {
238 struct ssusb_mtk *ssusb = dev_to_ssusb(dev->parent);
239 struct mtu3 *mtu = dev_get_priv(dev);
240
241 mtu->dev = dev;
242 ssusb->u3d = mtu;
243 return ssusb_gadget_init(ssusb);
244 }
245
mtu3_gadget_remove(struct udevice * dev)246 static int mtu3_gadget_remove(struct udevice *dev)
247 {
248 struct mtu3 *mtu = dev_get_priv(dev);
249
250 ssusb_gadget_exit(mtu->ssusb);
251 return 0;
252 }
253
254 U_BOOT_DRIVER(mtu3_peripheral) = {
255 .name = "mtu3-peripheral",
256 .id = UCLASS_USB_GADGET_GENERIC,
257 .of_match = ssusb_of_match,
258 .probe = mtu3_gadget_probe,
259 .remove = mtu3_gadget_remove,
260 .priv_auto = sizeof(struct mtu3),
261 };
262 #endif
263
264 #if defined(CONFIG_SPL_USB_HOST_SUPPORT) || \
265 (!defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_HOST))
mtu3_host_probe(struct udevice * dev)266 static int mtu3_host_probe(struct udevice *dev)
267 {
268 struct ssusb_mtk *ssusb = dev_to_ssusb(dev->parent);
269 struct mtu3_host *u3h = dev_get_priv(dev);
270 struct xhci_hcor *hcor;
271 int rc;
272
273 u3h->dev = dev;
274 ssusb->u3h = u3h;
275 rc = ssusb_host_init(ssusb);
276 if (rc)
277 return rc;
278
279 u3h->ctrl.quirks = XHCI_MTK_HOST;
280 hcor = (struct xhci_hcor *)((uintptr_t)u3h->hcd +
281 HC_LENGTH(xhci_readl(&u3h->hcd->cr_capbase)));
282
283 return xhci_register(dev, u3h->hcd, hcor);
284 }
285
mtu3_host_remove(struct udevice * dev)286 static int mtu3_host_remove(struct udevice *dev)
287 {
288 struct mtu3_host *u3h = dev_get_priv(dev);
289
290 xhci_deregister(dev);
291 ssusb_host_exit(u3h->ssusb);
292 return 0;
293 }
294
295 U_BOOT_DRIVER(mtu3_host) = {
296 .name = "mtu3-host",
297 .id = UCLASS_USB,
298 .of_match = ssusb_of_match,
299 .probe = mtu3_host_probe,
300 .remove = mtu3_host_remove,
301 .priv_auto = sizeof(struct mtu3_host),
302 .ops = &xhci_usb_ops,
303 .flags = DM_FLAG_ALLOC_PRIV_DMA,
304 };
305 #endif
306
mtu3_glue_bind(struct udevice * parent)307 static int mtu3_glue_bind(struct udevice *parent)
308 {
309 struct udevice *dev;
310 enum usb_dr_mode dr_mode;
311 const char *driver;
312 const char *name;
313 ofnode node;
314 int ret;
315
316 node = ofnode_by_compatible(dev_ofnode(parent), "mediatek,ssusb");
317 if (!ofnode_valid(node))
318 return -ENODEV;
319
320 name = ofnode_get_name(node);
321 dr_mode = usb_get_dr_mode(node);
322
323 switch (dr_mode) {
324 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
325 case USB_DR_MODE_PERIPHERAL:
326 case USB_DR_MODE_OTG:
327 dev_dbg(parent, "%s: dr_mode: peripheral\n", __func__);
328 driver = "mtu3-peripheral";
329 break;
330 #endif
331
332 #if defined(CONFIG_SPL_USB_HOST_SUPPORT) || \
333 (!defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_HOST))
334 case USB_DR_MODE_HOST:
335 dev_dbg(parent, "%s: dr_mode: host\n", __func__);
336 driver = "mtu3-host";
337 break;
338 #endif
339 default:
340 dev_err(parent, "%s: unsupported dr_mode %d\n",
341 __func__, dr_mode);
342 return -ENODEV;
343 };
344
345 dev_dbg(parent, "%s: node name: %s, driver %s, dr_mode %d\n",
346 __func__, name, driver, dr_mode);
347
348 ret = device_bind_driver_to_node(parent, driver, name, node, &dev);
349 if (ret)
350 dev_err(parent, "%s: not able to bind usb device mode\n",
351 __func__);
352
353 return ret;
354 }
355
356 static const struct udevice_id mtu3_of_match[] = {
357 {.compatible = "mediatek,mtu3",},
358 {},
359 };
360
361 U_BOOT_DRIVER(mtu3) = {
362 .name = "mtu3",
363 .id = UCLASS_NOP,
364 .of_match = mtu3_of_match,
365 .bind = mtu3_glue_bind,
366 .probe = mtu3_probe,
367 .remove = mtu3_remove,
368 .priv_auto = sizeof(struct ssusb_mtk),
369 };
370