1 #include <common.h>
2 #include <watchdog.h>
3 #ifdef CONFIG_ARCH_SUNXI
4 #include <asm/arch/usbc.h>
5 #endif
6 #include <asm/errno.h>
7 #include <linux/usb/ch9.h>
8 #include <linux/usb/gadget.h>
9 
10 #include <usb.h>
11 #include "linux-compat.h"
12 #include "usb-compat.h"
13 #include "musb_core.h"
14 #include "musb_host.h"
15 #include "musb_gadget.h"
16 
17 #ifdef CONFIG_MUSB_HOST
18 struct int_queue {
19 	struct usb_host_endpoint hep;
20 	struct urb urb;
21 };
22 
23 static struct musb *host;
24 static struct usb_hcd hcd;
25 static enum usb_device_speed host_speed;
26 
27 static void musb_host_complete_urb(struct urb *urb)
28 {
29 	urb->dev->status &= ~USB_ST_NOT_PROC;
30 	urb->dev->act_len = urb->actual_length;
31 }
32 
33 static struct usb_host_endpoint hep;
34 static struct urb urb;
35 
36 static void construct_urb(struct urb *urb, struct usb_host_endpoint *hep,
37 			  struct usb_device *dev, int endpoint_type,
38 			  unsigned long pipe, void *buffer, int len,
39 			  struct devrequest *setup, int interval)
40 {
41 	int epnum = usb_pipeendpoint(pipe);
42 	int is_in = usb_pipein(pipe);
43 
44 	memset(urb, 0, sizeof(struct urb));
45 	memset(hep, 0, sizeof(struct usb_host_endpoint));
46 	INIT_LIST_HEAD(&hep->urb_list);
47 	INIT_LIST_HEAD(&urb->urb_list);
48 	urb->ep = hep;
49 	urb->complete = musb_host_complete_urb;
50 	urb->status = -EINPROGRESS;
51 	urb->dev = dev;
52 	urb->pipe = pipe;
53 	urb->transfer_buffer = buffer;
54 	urb->transfer_dma = (unsigned long)buffer;
55 	urb->transfer_buffer_length = len;
56 	urb->setup_packet = (unsigned char *)setup;
57 
58 	urb->ep->desc.wMaxPacketSize =
59 		__cpu_to_le16(is_in ? dev->epmaxpacketin[epnum] :
60 				dev->epmaxpacketout[epnum]);
61 	urb->ep->desc.bmAttributes = endpoint_type;
62 	urb->ep->desc.bEndpointAddress =
63 		(is_in ? USB_DIR_IN : USB_DIR_OUT) | epnum;
64 	urb->ep->desc.bInterval = interval;
65 }
66 
67 static int submit_urb(struct usb_hcd *hcd, struct urb *urb)
68 {
69 	struct musb *host = hcd->hcd_priv;
70 	int ret;
71 	unsigned long timeout;
72 
73 	ret = musb_urb_enqueue(hcd, urb, 0);
74 	if (ret < 0) {
75 		printf("Failed to enqueue URB to controller\n");
76 		return ret;
77 	}
78 
79 	timeout = get_timer(0) + USB_TIMEOUT_MS(urb->pipe);
80 	do {
81 		if (ctrlc())
82 			return -EIO;
83 		host->isr(0, host);
84 	} while (urb->status == -EINPROGRESS &&
85 		 get_timer(0) < timeout);
86 
87 	if (urb->status == -EINPROGRESS)
88 		musb_urb_dequeue(hcd, urb, -ETIME);
89 
90 	return urb->status;
91 }
92 
93 int submit_control_msg(struct usb_device *dev, unsigned long pipe,
94 			void *buffer, int len, struct devrequest *setup)
95 {
96 	construct_urb(&urb, &hep, dev, USB_ENDPOINT_XFER_CONTROL, pipe,
97 		      buffer, len, setup, 0);
98 
99 	/* Fix speed for non hub-attached devices */
100 	if (!dev->parent)
101 		dev->speed = host_speed;
102 
103 	return submit_urb(&hcd, &urb);
104 }
105 
106 
107 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
108 					void *buffer, int len)
109 {
110 	construct_urb(&urb, &hep, dev, USB_ENDPOINT_XFER_BULK, pipe,
111 		      buffer, len, NULL, 0);
112 	return submit_urb(&hcd, &urb);
113 }
114 
115 int submit_int_msg(struct usb_device *dev, unsigned long pipe,
116 				void *buffer, int len, int interval)
117 {
118 	construct_urb(&urb, &hep, dev, USB_ENDPOINT_XFER_INT, pipe,
119 		      buffer, len, NULL, interval);
120 	return submit_urb(&hcd, &urb);
121 }
122 
123 struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
124 	int queuesize, int elementsize, void *buffer, int interval)
125 {
126 	struct int_queue *queue;
127 	int ret, index = usb_pipein(pipe) * 16 + usb_pipeendpoint(pipe);
128 
129 	if (queuesize != 1) {
130 		printf("ERROR musb int-queues only support queuesize 1\n");
131 		return NULL;
132 	}
133 
134 	if (dev->int_pending & (1 << index)) {
135 		printf("ERROR int-urb is already pending on pipe %lx\n", pipe);
136 		return NULL;
137 	}
138 
139 	queue = malloc(sizeof(*queue));
140 	if (!queue)
141 		return NULL;
142 
143 	construct_urb(&queue->urb, &queue->hep, dev, USB_ENDPOINT_XFER_INT,
144 		      pipe, buffer, elementsize, NULL, interval);
145 
146 	ret = musb_urb_enqueue(&hcd, &queue->urb, 0);
147 	if (ret < 0) {
148 		printf("Failed to enqueue URB to controller\n");
149 		free(queue);
150 		return NULL;
151 	}
152 
153 	dev->int_pending |= 1 << index;
154 	return queue;
155 }
156 
157 int destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
158 {
159 	int index = usb_pipein(queue->urb.pipe) * 16 +
160 		    usb_pipeendpoint(queue->urb.pipe);
161 
162 	if (queue->urb.status == -EINPROGRESS)
163 		musb_urb_dequeue(&hcd, &queue->urb, -ETIME);
164 
165 	dev->int_pending &= ~(1 << index);
166 	free(queue);
167 	return 0;
168 }
169 
170 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
171 {
172 	if (queue->urb.status != -EINPROGRESS)
173 		return NULL; /* URB has already completed in a prev. poll */
174 
175 	host->isr(0, host);
176 
177 	if (queue->urb.status != -EINPROGRESS)
178 		return queue->urb.transfer_buffer; /* Done */
179 
180 	return NULL; /* URB still pending */
181 }
182 
183 int usb_reset_root_port(void)
184 {
185 	void *mbase = host->mregs;
186 	u8 power;
187 
188 	power = musb_readb(mbase, MUSB_POWER);
189 	power &= 0xf0;
190 	musb_writeb(mbase, MUSB_POWER, MUSB_POWER_RESET | power);
191 	mdelay(50);
192 #ifdef CONFIG_ARCH_SUNXI
193 	/*
194 	 * sunxi phy has a bug and it will wrongly detect high speed squelch
195 	 * when clearing reset on low-speed devices, temporary disable
196 	 * squelch detection to work around this.
197 	 */
198 	sunxi_usbc_enable_squelch_detect(0, 0);
199 #endif
200 	power = musb_readb(mbase, MUSB_POWER);
201 	musb_writeb(mbase, MUSB_POWER, ~MUSB_POWER_RESET & power);
202 #ifdef CONFIG_ARCH_SUNXI
203 	sunxi_usbc_enable_squelch_detect(0, 1);
204 #endif
205 	host->isr(0, host);
206 	host_speed = (musb_readb(mbase, MUSB_POWER) & MUSB_POWER_HSMODE) ?
207 			USB_SPEED_HIGH :
208 			(musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_FSDEV) ?
209 			USB_SPEED_FULL : USB_SPEED_LOW;
210 	mdelay((host_speed == USB_SPEED_LOW) ? 200 : 50);
211 
212 	return 0;
213 }
214 
215 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
216 {
217 	void *mbase;
218 	/* USB spec says it may take up to 1 second for a device to connect */
219 	unsigned long timeout = get_timer(0) + 1000;
220 
221 	if (!host) {
222 		printf("MUSB host is not registered\n");
223 		return -ENODEV;
224 	}
225 
226 	musb_start(host);
227 	mbase = host->mregs;
228 	do {
229 		if (musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_HM)
230 			break;
231 	} while (get_timer(0) < timeout);
232 	if (get_timer(0) >= timeout)
233 		return -ENODEV;
234 
235 	usb_reset_root_port();
236 	host->is_active = 1;
237 	hcd.hcd_priv = host;
238 
239 	return 0;
240 }
241 
242 int usb_lowlevel_stop(int index)
243 {
244 	if (!host) {
245 		printf("MUSB host is not registered\n");
246 		return -ENODEV;
247 	}
248 
249 	musb_stop(host);
250 	return 0;
251 }
252 #endif /* CONFIG_MUSB_HOST */
253 
254 #ifdef CONFIG_MUSB_GADGET
255 static struct musb *gadget;
256 
257 int usb_gadget_handle_interrupts(int index)
258 {
259 	WATCHDOG_RESET();
260 	if (!gadget || !gadget->isr)
261 		return -EINVAL;
262 
263 	return gadget->isr(0, gadget);
264 }
265 
266 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
267 {
268 	int ret;
269 
270 	if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind ||
271 	    !driver->setup) {
272 		printf("bad parameter.\n");
273 		return -EINVAL;
274 	}
275 
276 	if (!gadget) {
277 		printf("Controller uninitialized\n");
278 		return -ENXIO;
279 	}
280 
281 	ret = musb_gadget_start(&gadget->g, driver);
282 	if (ret < 0) {
283 		printf("gadget_start failed with %d\n", ret);
284 		return ret;
285 	}
286 
287 	ret = driver->bind(&gadget->g);
288 	if (ret < 0) {
289 		printf("bind failed with %d\n", ret);
290 		return ret;
291 	}
292 
293 	return 0;
294 }
295 
296 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
297 {
298 	if (driver->disconnect)
299 		driver->disconnect(&gadget->g);
300 	if (driver->unbind)
301 		driver->unbind(&gadget->g);
302 	return 0;
303 }
304 #endif /* CONFIG_MUSB_GADGET */
305 
306 int musb_register(struct musb_hdrc_platform_data *plat, void *bdata,
307 			void *ctl_regs)
308 {
309 	struct musb **musbp;
310 
311 	switch (plat->mode) {
312 #ifdef CONFIG_MUSB_HOST
313 	case MUSB_HOST:
314 		musbp = &host;
315 		break;
316 #endif
317 #ifdef CONFIG_MUSB_GADGET
318 	case MUSB_PERIPHERAL:
319 		musbp = &gadget;
320 		break;
321 #endif
322 	default:
323 		return -EINVAL;
324 	}
325 
326 	*musbp = musb_init_controller(plat, (struct device *)bdata, ctl_regs);
327 	if (!musbp) {
328 		printf("Failed to init the controller\n");
329 		return -EIO;
330 	}
331 
332 	return 0;
333 }
334