1 #include <common.h>
2 #include <watchdog.h>
3 #include <asm/errno.h>
4 #include <linux/usb/ch9.h>
5 #include <linux/usb/gadget.h>
6 
7 #define __UBOOT__
8 #include <usb.h>
9 #include "linux-compat.h"
10 #include "usb-compat.h"
11 #include "musb_core.h"
12 #include "musb_host.h"
13 #include "musb_gadget.h"
14 
15 #ifdef CONFIG_MUSB_HOST
16 static struct musb *host;
17 static struct usb_hcd hcd;
18 static enum usb_device_speed host_speed;
19 
20 static void musb_host_complete_urb(struct urb *urb)
21 {
22 	urb->dev->status &= ~USB_ST_NOT_PROC;
23 	urb->dev->act_len = urb->actual_length;
24 }
25 
26 static struct usb_host_endpoint hep;
27 static struct urb urb;
28 
29 static struct urb *construct_urb(struct usb_device *dev, int endpoint_type,
30 				unsigned long pipe, void *buffer, int len,
31 				struct devrequest *setup, int interval)
32 {
33 	int epnum = usb_pipeendpoint(pipe);
34 	int is_in = usb_pipein(pipe);
35 
36 	memset(&urb, 0, sizeof(struct urb));
37 	memset(&hep, 0, sizeof(struct usb_host_endpoint));
38 	INIT_LIST_HEAD(&hep.urb_list);
39 	INIT_LIST_HEAD(&urb.urb_list);
40 	urb.ep = &hep;
41 	urb.complete = musb_host_complete_urb;
42 	urb.status = -EINPROGRESS;
43 	urb.dev = dev;
44 	urb.pipe = pipe;
45 	urb.transfer_buffer = buffer;
46 	urb.transfer_dma = (unsigned long)buffer;
47 	urb.transfer_buffer_length = len;
48 	urb.setup_packet = (unsigned char *)setup;
49 
50 	urb.ep->desc.wMaxPacketSize =
51 		__cpu_to_le16(is_in ? dev->epmaxpacketin[epnum] :
52 				dev->epmaxpacketout[epnum]);
53 	urb.ep->desc.bmAttributes = endpoint_type;
54 	urb.ep->desc.bEndpointAddress =
55 		(is_in ? USB_DIR_IN : USB_DIR_OUT) | epnum;
56 	urb.ep->desc.bInterval = interval;
57 
58 	return &urb;
59 }
60 
61 #define MUSB_HOST_TIMEOUT	0x3ffffff
62 
63 static int submit_urb(struct usb_hcd *hcd, struct urb *urb)
64 {
65 	struct musb *host = hcd->hcd_priv;
66 	int ret;
67 	int timeout;
68 
69 	ret = musb_urb_enqueue(hcd, urb, 0);
70 	if (ret < 0) {
71 		printf("Failed to enqueue URB to controller\n");
72 		return ret;
73 	}
74 
75 	timeout = MUSB_HOST_TIMEOUT;
76 	do {
77 		if (ctrlc())
78 			return -EIO;
79 		host->isr(0, host);
80 	} while ((urb->dev->status & USB_ST_NOT_PROC) && --timeout);
81 
82 	return urb->status;
83 }
84 
85 int submit_control_msg(struct usb_device *dev, unsigned long pipe,
86 			void *buffer, int len, struct devrequest *setup)
87 {
88 	struct urb *urb = construct_urb(dev, USB_ENDPOINT_XFER_CONTROL, pipe,
89 					buffer, len, setup, 0);
90 
91 	/* Fix speed for non hub-attached devices */
92 	if (!dev->parent)
93 		dev->speed = host_speed;
94 
95 	return submit_urb(&hcd, urb);
96 }
97 
98 
99 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
100 					void *buffer, int len)
101 {
102 	struct urb *urb = construct_urb(dev, USB_ENDPOINT_XFER_BULK, pipe,
103 					buffer, len, NULL, 0);
104 	return submit_urb(&hcd, urb);
105 }
106 
107 int submit_int_msg(struct usb_device *dev, unsigned long pipe,
108 				void *buffer, int len, int interval)
109 {
110 	struct urb *urb = construct_urb(dev, USB_ENDPOINT_XFER_INT, pipe,
111 					buffer, len, NULL, interval);
112 	return submit_urb(&hcd, urb);
113 }
114 
115 int usb_lowlevel_init(int index, void **controller)
116 {
117 	u8 power;
118 	void *mbase;
119 	int timeout = MUSB_HOST_TIMEOUT;
120 
121 	if (!host) {
122 		printf("MUSB host is not registered\n");
123 		return -ENODEV;
124 	}
125 
126 	musb_start(host);
127 	mbase = host->mregs;
128 	do {
129 		if (musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_HM)
130 			break;
131 	} while (--timeout);
132 	if (!timeout)
133 		return -ENODEV;
134 
135 	power = musb_readb(mbase, MUSB_POWER);
136 	musb_writeb(mbase, MUSB_POWER, MUSB_POWER_RESET | power);
137 	udelay(30000);
138 	power = musb_readb(mbase, MUSB_POWER);
139 	musb_writeb(mbase, MUSB_POWER, ~MUSB_POWER_RESET & power);
140 	host->isr(0, host);
141 	host_speed = (musb_readb(mbase, MUSB_POWER) & MUSB_POWER_HSMODE) ?
142 			USB_SPEED_HIGH :
143 			(musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_FSDEV) ?
144 			USB_SPEED_FULL : USB_SPEED_LOW;
145 	host->is_active = 1;
146 	hcd.hcd_priv = host;
147 
148 	return 0;
149 }
150 
151 int usb_lowlevel_stop(int index)
152 {
153 	if (!host) {
154 		printf("MUSB host is not registered\n");
155 		return -ENODEV;
156 	}
157 
158 	musb_stop(host);
159 	return 0;
160 }
161 #endif /* CONFIG_MUSB_HOST */
162 
163 #ifdef CONFIG_MUSB_GADGET
164 static struct musb *gadget;
165 
166 int usb_gadget_handle_interrupts(void)
167 {
168 	WATCHDOG_RESET();
169 	if (!gadget || !gadget->isr)
170 		return -EINVAL;
171 
172 	return gadget->isr(0, gadget);
173 }
174 
175 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
176 {
177 	int ret;
178 
179 	if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind ||
180 	    !driver->setup) {
181 		printf("bad parameter.\n");
182 		return -EINVAL;
183 	}
184 
185 	if (!gadget) {
186 		printf("Controller uninitialized\n");
187 		return -ENXIO;
188 	}
189 
190 	ret = musb_gadget_start(&gadget->g, driver);
191 	if (ret < 0) {
192 		printf("gadget_start failed with %d\n", ret);
193 		return ret;
194 	}
195 
196 	ret = driver->bind(&gadget->g);
197 	if (ret < 0) {
198 		printf("bind failed with %d\n", ret);
199 		return ret;
200 	}
201 
202 	return 0;
203 }
204 
205 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
206 {
207 	/* TODO: implement me */
208 	return 0;
209 }
210 #endif /* CONFIG_MUSB_GADGET */
211 
212 int musb_register(struct musb_hdrc_platform_data *plat, void *bdata,
213 			void *ctl_regs)
214 {
215 	struct musb **musbp;
216 
217 	switch (plat->mode) {
218 #ifdef CONFIG_MUSB_HOST
219 	case MUSB_HOST:
220 		musbp = &host;
221 		break;
222 #endif
223 #ifdef CONFIG_MUSB_GADGET
224 	case MUSB_PERIPHERAL:
225 		musbp = &gadget;
226 		break;
227 #endif
228 	default:
229 		return -EINVAL;
230 	}
231 
232 	*musbp = musb_init_controller(plat, (struct device *)bdata, ctl_regs);
233 	if (!musbp) {
234 		printf("Failed to init the controller\n");
235 		return -EIO;
236 	}
237 
238 	return 0;
239 }
240