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1 | /* | |
2 | * Copyright (c) 2011 The Chromium OS Authors. | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include <common.h> | |
8 | #include <dm.h> | |
9 | #include <malloc.h> | |
10 | #include <usb.h> | |
11 | #include <dm/device-internal.h> | |
12 | ||
13 | #include "usb_ether.h" | |
14 | ||
15 | #ifdef CONFIG_DM_ETH | |
16 | ||
17 | #define USB_BULK_RECV_TIMEOUT 500 | |
18 | ||
19 | int usb_ether_register(struct udevice *dev, struct ueth_data *ueth, int rxsize) | |
20 | { | |
21 | struct usb_device *udev = dev_get_parentdata(dev); | |
22 | struct usb_interface_descriptor *iface_desc; | |
23 | bool ep_in_found = false, ep_out_found = false; | |
24 | struct usb_interface *iface; | |
25 | const int ifnum = 0; /* Always use interface 0 */ | |
26 | int ret, i; | |
27 | ||
28 | iface = &udev->config.if_desc[ifnum]; | |
29 | iface_desc = &udev->config.if_desc[ifnum].desc; | |
30 | ||
31 | /* Initialize the ueth_data structure with some useful info */ | |
32 | ueth->ifnum = ifnum; | |
33 | ueth->subclass = iface_desc->bInterfaceSubClass; | |
34 | ueth->protocol = iface_desc->bInterfaceProtocol; | |
35 | ||
36 | /* | |
37 | * We are expecting a minimum of 3 endpoints - in, out (bulk), and int. | |
38 | * We will ignore any others. | |
39 | */ | |
40 | for (i = 0; i < iface_desc->bNumEndpoints; i++) { | |
41 | int ep_addr = iface->ep_desc[i].bEndpointAddress; | |
42 | ||
43 | /* is it an BULK endpoint? */ | |
44 | if ((iface->ep_desc[i].bmAttributes & | |
45 | USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) { | |
46 | if (ep_addr & USB_DIR_IN && !ep_in_found) { | |
47 | ueth->ep_in = ep_addr & | |
48 | USB_ENDPOINT_NUMBER_MASK; | |
49 | ep_in_found = true; | |
50 | } else if (!(ep_addr & USB_DIR_IN) && !ep_out_found) { | |
51 | ueth->ep_out = ep_addr & | |
52 | USB_ENDPOINT_NUMBER_MASK; | |
53 | ep_out_found = true; | |
54 | } | |
55 | } | |
56 | ||
57 | /* is it an interrupt endpoint? */ | |
58 | if ((iface->ep_desc[i].bmAttributes & | |
59 | USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) { | |
60 | ueth->ep_int = iface->ep_desc[i].bEndpointAddress & | |
61 | USB_ENDPOINT_NUMBER_MASK; | |
62 | ueth->irqinterval = iface->ep_desc[i].bInterval; | |
63 | } | |
64 | } | |
65 | debug("Endpoints In %d Out %d Int %d\n", ueth->ep_in, ueth->ep_out, | |
66 | ueth->ep_int); | |
67 | ||
68 | /* Do some basic sanity checks, and bail if we find a problem */ | |
69 | if (!ueth->ep_in || !ueth->ep_out || !ueth->ep_int) { | |
70 | debug("%s: %s: Cannot find endpoints\n", __func__, dev->name); | |
71 | return -ENXIO; | |
72 | } | |
73 | ||
74 | ueth->rxsize = rxsize; | |
75 | ueth->rxbuf = memalign(rxsize, ARCH_DMA_MINALIGN); | |
76 | if (!ueth->rxbuf) | |
77 | return -ENOMEM; | |
78 | ||
79 | ret = usb_set_interface(udev, iface_desc->bInterfaceNumber, ifnum); | |
80 | if (ret) { | |
81 | debug("%s: %s: Cannot set interface: %d\n", __func__, dev->name, | |
82 | ret); | |
83 | return ret; | |
84 | } | |
85 | ueth->pusb_dev = udev; | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | int usb_ether_deregister(struct ueth_data *ueth) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | int usb_ether_receive(struct ueth_data *ueth, int rxsize) | |
96 | { | |
97 | int actual_len; | |
98 | int ret; | |
99 | ||
100 | if (rxsize > ueth->rxsize) | |
101 | return -EINVAL; | |
102 | ret = usb_bulk_msg(ueth->pusb_dev, | |
103 | usb_rcvbulkpipe(ueth->pusb_dev, ueth->ep_in), | |
104 | ueth->rxbuf, rxsize, &actual_len, | |
105 | USB_BULK_RECV_TIMEOUT); | |
106 | debug("Rx: len = %u, actual = %u, err = %d\n", rxsize, actual_len, ret); | |
107 | if (ret) { | |
108 | printf("Rx: failed to receive: %d\n", ret); | |
109 | return ret; | |
110 | } | |
111 | if (actual_len > rxsize) { | |
112 | debug("Rx: received too many bytes %d\n", actual_len); | |
113 | return -ENOSPC; | |
114 | } | |
115 | ueth->rxlen = actual_len; | |
116 | ueth->rxptr = 0; | |
117 | ||
118 | return actual_len ? 0 : -EAGAIN; | |
119 | } | |
120 | ||
121 | void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes) | |
122 | { | |
123 | ueth->rxptr += num_bytes; | |
124 | if (num_bytes < 0 || ueth->rxptr >= ueth->rxlen) | |
125 | ueth->rxlen = 0; | |
126 | } | |
127 | ||
128 | int usb_ether_get_rx_bytes(struct ueth_data *ueth, uint8_t **ptrp) | |
129 | { | |
130 | if (!ueth->rxlen) | |
131 | return 0; | |
132 | ||
133 | *ptrp = &ueth->rxbuf[ueth->rxptr]; | |
134 | ||
135 | return ueth->rxlen - ueth->rxptr; | |
136 | } | |
137 | ||
138 | #else | |
139 | ||
140 | typedef void (*usb_eth_before_probe)(void); | |
141 | typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum, | |
142 | struct ueth_data *ss); | |
143 | typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss, | |
144 | struct eth_device *dev_desc); | |
145 | ||
146 | struct usb_eth_prob_dev { | |
147 | usb_eth_before_probe before_probe; /* optional */ | |
148 | usb_eth_probe probe; | |
149 | usb_eth_get_info get_info; | |
150 | }; | |
151 | ||
152 | /* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */ | |
153 | static const struct usb_eth_prob_dev prob_dev[] = { | |
154 | #ifdef CONFIG_USB_ETHER_ASIX | |
155 | { | |
156 | .before_probe = asix_eth_before_probe, | |
157 | .probe = asix_eth_probe, | |
158 | .get_info = asix_eth_get_info, | |
159 | }, | |
160 | #endif | |
161 | #ifdef CONFIG_USB_ETHER_ASIX88179 | |
162 | { | |
163 | .before_probe = ax88179_eth_before_probe, | |
164 | .probe = ax88179_eth_probe, | |
165 | .get_info = ax88179_eth_get_info, | |
166 | }, | |
167 | #endif | |
168 | #ifdef CONFIG_USB_ETHER_MCS7830 | |
169 | { | |
170 | .before_probe = mcs7830_eth_before_probe, | |
171 | .probe = mcs7830_eth_probe, | |
172 | .get_info = mcs7830_eth_get_info, | |
173 | }, | |
174 | #endif | |
175 | #ifdef CONFIG_USB_ETHER_SMSC95XX | |
176 | { | |
177 | .before_probe = smsc95xx_eth_before_probe, | |
178 | .probe = smsc95xx_eth_probe, | |
179 | .get_info = smsc95xx_eth_get_info, | |
180 | }, | |
181 | #endif | |
182 | { }, /* END */ | |
183 | }; | |
184 | ||
185 | static int usb_max_eth_dev; /* number of highest available usb eth device */ | |
186 | static struct ueth_data usb_eth[USB_MAX_ETH_DEV]; | |
187 | ||
188 | /******************************************************************************* | |
189 | * tell if current ethernet device is a usb dongle | |
190 | */ | |
191 | int is_eth_dev_on_usb_host(void) | |
192 | { | |
193 | int i; | |
194 | struct eth_device *dev = eth_get_dev(); | |
195 | ||
196 | if (dev) { | |
197 | for (i = 0; i < usb_max_eth_dev; i++) | |
198 | if (&usb_eth[i].eth_dev == dev) | |
199 | return 1; | |
200 | } | |
201 | return 0; | |
202 | } | |
203 | ||
204 | /* | |
205 | * Given a USB device, ask each driver if it can support it, and attach it | |
206 | * to the first driver that says 'yes' | |
207 | */ | |
208 | static void probe_valid_drivers(struct usb_device *dev) | |
209 | { | |
210 | struct eth_device *eth; | |
211 | int j; | |
212 | ||
213 | for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) { | |
214 | if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev])) | |
215 | continue; | |
216 | /* | |
217 | * ok, it is a supported eth device. Get info and fill it in | |
218 | */ | |
219 | eth = &usb_eth[usb_max_eth_dev].eth_dev; | |
220 | if (prob_dev[j].get_info(dev, | |
221 | &usb_eth[usb_max_eth_dev], | |
222 | eth)) { | |
223 | /* found proper driver */ | |
224 | /* register with networking stack */ | |
225 | usb_max_eth_dev++; | |
226 | ||
227 | /* | |
228 | * usb_max_eth_dev must be incremented prior to this | |
229 | * call since eth_current_changed (internally called) | |
230 | * relies on it | |
231 | */ | |
232 | eth_register(eth); | |
233 | if (eth_write_hwaddr(eth, "usbeth", | |
234 | usb_max_eth_dev - 1)) | |
235 | puts("Warning: failed to set MAC address\n"); | |
236 | break; | |
237 | } | |
238 | } | |
239 | } | |
240 | ||
241 | /******************************************************************************* | |
242 | * scan the usb and reports device info | |
243 | * to the user if mode = 1 | |
244 | * returns current device or -1 if no | |
245 | */ | |
246 | int usb_host_eth_scan(int mode) | |
247 | { | |
248 | int i, old_async; | |
249 | ||
250 | if (mode == 1) | |
251 | printf(" scanning usb for ethernet devices... "); | |
252 | ||
253 | old_async = usb_disable_asynch(1); /* asynch transfer not allowed */ | |
254 | ||
255 | /* unregister a previously detected device */ | |
256 | for (i = 0; i < usb_max_eth_dev; i++) | |
257 | eth_unregister(&usb_eth[i].eth_dev); | |
258 | ||
259 | memset(usb_eth, 0, sizeof(usb_eth)); | |
260 | ||
261 | for (i = 0; prob_dev[i].probe; i++) { | |
262 | if (prob_dev[i].before_probe) | |
263 | prob_dev[i].before_probe(); | |
264 | } | |
265 | ||
266 | usb_max_eth_dev = 0; | |
267 | #ifdef CONFIG_DM_USB | |
268 | /* | |
269 | * TODO: We should add U_BOOT_USB_DEVICE() declarations to each USB | |
270 | * Ethernet driver and then most of this file can be removed. | |
271 | */ | |
272 | struct udevice *bus; | |
273 | struct uclass *uc; | |
274 | int ret; | |
275 | ||
276 | ret = uclass_get(UCLASS_USB, &uc); | |
277 | if (ret) | |
278 | return ret; | |
279 | uclass_foreach_dev(bus, uc) { | |
280 | for (i = 0; i < USB_MAX_DEVICE; i++) { | |
281 | struct usb_device *dev; | |
282 | ||
283 | dev = usb_get_dev_index(bus, i); /* get device */ | |
284 | debug("i=%d, %s\n", i, dev ? dev->dev->name : "(done)"); | |
285 | if (!dev) | |
286 | break; /* no more devices available */ | |
287 | ||
288 | /* | |
289 | * find valid usb_ether driver for this device, | |
290 | * if any | |
291 | */ | |
292 | probe_valid_drivers(dev); | |
293 | ||
294 | /* check limit */ | |
295 | if (usb_max_eth_dev == USB_MAX_ETH_DEV) | |
296 | break; | |
297 | } /* for */ | |
298 | } | |
299 | #else | |
300 | for (i = 0; i < USB_MAX_DEVICE; i++) { | |
301 | struct usb_device *dev; | |
302 | ||
303 | dev = usb_get_dev_index(i); /* get device */ | |
304 | debug("i=%d\n", i); | |
305 | if (!dev) | |
306 | break; /* no more devices available */ | |
307 | ||
308 | /* find valid usb_ether driver for this device, if any */ | |
309 | probe_valid_drivers(dev); | |
310 | ||
311 | /* check limit */ | |
312 | if (usb_max_eth_dev == USB_MAX_ETH_DEV) | |
313 | break; | |
314 | } /* for */ | |
315 | #endif | |
316 | if (usb_max_eth_dev == USB_MAX_ETH_DEV) { | |
317 | printf("max USB Ethernet Device reached: %d stopping\n", | |
318 | usb_max_eth_dev); | |
319 | } | |
320 | usb_disable_asynch(old_async); /* restore asynch value */ | |
321 | printf("%d Ethernet Device(s) found\n", usb_max_eth_dev); | |
322 | if (usb_max_eth_dev > 0) | |
323 | return 0; | |
324 | return -1; | |
325 | } | |
326 | #endif |