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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/sched.h>
13#include <linux/stddef.h>
14#include <linux/init.h>
15#include <linux/netdevice.h>
16#include <linux/etherdevice.h>
17#include <linux/ethtool.h>
18#include <linux/mii.h>
19#include <linux/usb.h>
20#include <linux/crc32.h>
21#include <linux/usb/usbnet.h>
22#include <linux/slab.h>
23
24#define CH9200_VID 0x1A86
25#define CH9200_PID_E092 0xE092
26
27#define CTRL_TIMEOUT_MS 1000
28
29#define CONTROL_TIMEOUT_MS 1000
30
31#define REQUEST_READ 0x0E
32#define REQUEST_WRITE 0x0F
33
34
35
36
37
38
39
40
41#define MAC_REG_CTRL 64
42#define MAC_REG_STATUS 66
43#define MAC_REG_INTERRUPT_MASK 68
44#define MAC_REG_PHY_COMMAND 70
45#define MAC_REG_PHY_DATA 72
46#define MAC_REG_STATION_L 74
47#define MAC_REG_STATION_M 76
48#define MAC_REG_STATION_H 78
49#define MAC_REG_HASH_L 80
50#define MAC_REG_HASH_M1 82
51#define MAC_REG_HASH_M2 84
52#define MAC_REG_HASH_H 86
53#define MAC_REG_THRESHOLD 88
54#define MAC_REG_FIFO_DEPTH 90
55#define MAC_REG_PAUSE 92
56#define MAC_REG_FLOW_CONTROL 94
57
58
59
60
61
62#define LOOPBACK (0x01 << 14)
63#define BASE100X (0x01 << 12)
64#define MBPS_10 (0x01 << 11)
65#define DUPLEX_MODE (0x01 << 10)
66#define PAUSE_FRAME (0x01 << 9)
67#define PROMISCUOUS (0x01 << 8)
68#define MULTICAST (0x01 << 7)
69#define BROADCAST (0x01 << 6)
70#define HASH (0x01 << 5)
71#define APPEND_PAD (0x01 << 4)
72#define APPEND_CRC (0x01 << 3)
73#define TRANSMITTER_ACTION (0x01 << 2)
74#define RECEIVER_ACTION (0x01 << 1)
75#define DMA_ACTION (0x01 << 0)
76
77
78
79
80
81#define ALIGNMENT (0x01 << 6)
82#define FIFO_OVER_RUN (0x01 << 5)
83#define FIFO_UNDER_RUN (0x01 << 4)
84#define RX_ERROR (0x01 << 3)
85#define RX_COMPLETE (0x01 << 2)
86#define TX_ERROR (0x01 << 1)
87#define TX_COMPLETE (0x01 << 0)
88
89
90
91
92
93
94#define ETH_TXBD (0x01 << 15)
95#define ETN_TX_FIFO_DEPTH (0x01 << 8)
96#define ETH_RXBD (0x01 << 7)
97#define ETH_RX_FIFO_DEPTH (0x01 << 0)
98
99static int control_read(struct usbnet *dev,
100 unsigned char request, unsigned short value,
101 unsigned short index, void *data, unsigned short size,
102 int timeout)
103{
104 unsigned char *buf = NULL;
105 unsigned char request_type;
106 int err = 0;
107
108 if (request == REQUEST_READ)
109 request_type = (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER);
110 else
111 request_type = (USB_DIR_IN | USB_TYPE_VENDOR |
112 USB_RECIP_DEVICE);
113
114 netdev_dbg(dev->net, "%s() index=0x%02x size=%d\n",
115 __func__, index, size);
116
117 buf = kmalloc(size, GFP_KERNEL);
118 if (!buf) {
119 err = -ENOMEM;
120 goto err_out;
121 }
122
123 err = usb_control_msg(dev->udev,
124 usb_rcvctrlpipe(dev->udev, 0),
125 request, request_type, value, index, buf, size,
126 timeout);
127 if (err == size)
128 memcpy(data, buf, size);
129 else if (err >= 0)
130 err = -EINVAL;
131 kfree(buf);
132
133err_out:
134 return err;
135}
136
137static int control_write(struct usbnet *dev, unsigned char request,
138 unsigned short value, unsigned short index,
139 void *data, unsigned short size, int timeout)
140{
141 unsigned char *buf = NULL;
142 unsigned char request_type;
143 int err = 0;
144
145 if (request == REQUEST_WRITE)
146 request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
147 USB_RECIP_OTHER);
148 else
149 request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
150 USB_RECIP_DEVICE);
151
152 netdev_dbg(dev->net, "%s() index=0x%02x size=%d\n",
153 __func__, index, size);
154
155 if (data) {
156 buf = kmemdup(data, size, GFP_KERNEL);
157 if (!buf) {
158 err = -ENOMEM;
159 goto err_out;
160 }
161 }
162
163 err = usb_control_msg(dev->udev,
164 usb_sndctrlpipe(dev->udev, 0),
165 request, request_type, value, index, buf, size,
166 timeout);
167 if (err >= 0 && err < size)
168 err = -EINVAL;
169 kfree(buf);
170
171 return 0;
172
173err_out:
174 return err;
175}
176
177static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc)
178{
179 struct usbnet *dev = netdev_priv(netdev);
180 unsigned char buff[2];
181
182 netdev_dbg(netdev, "%s phy_id:%02x loc:%02x\n",
183 __func__, phy_id, loc);
184
185 if (phy_id != 0)
186 return -ENODEV;
187
188 control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02,
189 CONTROL_TIMEOUT_MS);
190
191 return (buff[0] | buff[1] << 8);
192}
193
194static void ch9200_mdio_write(struct net_device *netdev,
195 int phy_id, int loc, int val)
196{
197 struct usbnet *dev = netdev_priv(netdev);
198 unsigned char buff[2];
199
200 netdev_dbg(netdev, "%s() phy_id=%02x loc:%02x\n",
201 __func__, phy_id, loc);
202
203 if (phy_id != 0)
204 return;
205
206 buff[0] = (unsigned char)val;
207 buff[1] = (unsigned char)(val >> 8);
208
209 control_write(dev, REQUEST_WRITE, 0, loc * 2, buff, 0x02,
210 CONTROL_TIMEOUT_MS);
211}
212
213static int ch9200_link_reset(struct usbnet *dev)
214{
215 struct ethtool_cmd ecmd;
216
217 mii_check_media(&dev->mii, 1, 1);
218 mii_ethtool_gset(&dev->mii, &ecmd);
219
220 netdev_dbg(dev->net, "%s() speed:%d duplex:%d\n",
221 __func__, ecmd.speed, ecmd.duplex);
222
223 return 0;
224}
225
226static void ch9200_status(struct usbnet *dev, struct urb *urb)
227{
228 int link;
229 unsigned char *buf;
230
231 if (urb->actual_length < 16)
232 return;
233
234 buf = urb->transfer_buffer;
235 link = !!(buf[0] & 0x01);
236
237 if (link) {
238 netif_carrier_on(dev->net);
239 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
240 } else {
241 netif_carrier_off(dev->net);
242 }
243}
244
245static struct sk_buff *ch9200_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
246 gfp_t flags)
247{
248 int i = 0;
249 int len = 0;
250 int tx_overhead = 0;
251
252 tx_overhead = 0x40;
253
254 len = skb->len;
255 if (skb_cow_head(skb, tx_overhead)) {
256 dev_kfree_skb_any(skb);
257 return NULL;
258 }
259
260 __skb_push(skb, tx_overhead);
261
262
263
264 if ((skb->len % dev->maxpacket) == 0)
265 len++;
266
267 skb->data[0] = len;
268 skb->data[1] = len >> 8;
269 skb->data[2] = 0x00;
270 skb->data[3] = 0x80;
271
272 for (i = 4; i < 48; i++)
273 skb->data[i] = 0x00;
274
275 skb->data[48] = len;
276 skb->data[49] = len >> 8;
277 skb->data[50] = 0x00;
278 skb->data[51] = 0x80;
279
280 for (i = 52; i < 64; i++)
281 skb->data[i] = 0x00;
282
283 return skb;
284}
285
286static int ch9200_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
287{
288 int len = 0;
289 int rx_overhead = 0;
290
291 rx_overhead = 64;
292
293 if (unlikely(skb->len < rx_overhead)) {
294 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
295 return 0;
296 }
297
298 len = (skb->data[skb->len - 16] | skb->data[skb->len - 15] << 8);
299 skb_trim(skb, len);
300
301 return 1;
302}
303
304static int get_mac_address(struct usbnet *dev, unsigned char *data)
305{
306 int err = 0;
307 unsigned char mac_addr[0x06];
308 int rd_mac_len = 0;
309
310 netdev_dbg(dev->net, "%s:\n\tusbnet VID:%0x PID:%0x\n", __func__,
311 le16_to_cpu(dev->udev->descriptor.idVendor),
312 le16_to_cpu(dev->udev->descriptor.idProduct));
313
314 memset(mac_addr, 0, sizeof(mac_addr));
315 rd_mac_len = control_read(dev, REQUEST_READ, 0,
316 MAC_REG_STATION_L, mac_addr, 0x02,
317 CONTROL_TIMEOUT_MS);
318 rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_M,
319 mac_addr + 2, 0x02, CONTROL_TIMEOUT_MS);
320 rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_H,
321 mac_addr + 4, 0x02, CONTROL_TIMEOUT_MS);
322 if (rd_mac_len != ETH_ALEN)
323 err = -EINVAL;
324
325 data[0] = mac_addr[5];
326 data[1] = mac_addr[4];
327 data[2] = mac_addr[3];
328 data[3] = mac_addr[2];
329 data[4] = mac_addr[1];
330 data[5] = mac_addr[0];
331
332 return err;
333}
334
335static int ch9200_bind(struct usbnet *dev, struct usb_interface *intf)
336{
337 int retval = 0;
338 unsigned char data[2];
339
340 retval = usbnet_get_endpoints(dev, intf);
341 if (retval)
342 return retval;
343
344 dev->mii.dev = dev->net;
345 dev->mii.mdio_read = ch9200_mdio_read;
346 dev->mii.mdio_write = ch9200_mdio_write;
347 dev->mii.reg_num_mask = 0x1f;
348
349 dev->mii.phy_id_mask = 0x1f;
350
351 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
352 dev->rx_urb_size = 24 * 64 + 16;
353 mii_nway_restart(&dev->mii);
354
355 data[0] = 0x01;
356 data[1] = 0x0F;
357 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_THRESHOLD, data,
358 0x02, CONTROL_TIMEOUT_MS);
359
360 data[0] = 0xA0;
361 data[1] = 0x90;
362 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FIFO_DEPTH, data,
363 0x02, CONTROL_TIMEOUT_MS);
364
365 data[0] = 0x30;
366 data[1] = 0x00;
367 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_PAUSE, data,
368 0x02, CONTROL_TIMEOUT_MS);
369
370 data[0] = 0x17;
371 data[1] = 0xD8;
372 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FLOW_CONTROL,
373 data, 0x02, CONTROL_TIMEOUT_MS);
374
375
376 data[0] = 0x01;
377 data[1] = 0x00;
378 retval = control_write(dev, REQUEST_WRITE, 0, 254, data, 0x02,
379 CONTROL_TIMEOUT_MS);
380
381 data[0] = 0x5F;
382 data[1] = 0x0D;
383 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_CTRL, data, 0x02,
384 CONTROL_TIMEOUT_MS);
385
386 retval = get_mac_address(dev, dev->net->dev_addr);
387
388 return retval;
389}
390
391static const struct driver_info ch9200_info = {
392 .description = "CH9200 USB to Network Adaptor",
393 .flags = FLAG_ETHER,
394 .bind = ch9200_bind,
395 .rx_fixup = ch9200_rx_fixup,
396 .tx_fixup = ch9200_tx_fixup,
397 .status = ch9200_status,
398 .link_reset = ch9200_link_reset,
399 .reset = ch9200_link_reset,
400};
401
402static const struct usb_device_id ch9200_products[] = {
403 {
404 USB_DEVICE(0x1A86, 0xE092),
405 .driver_info = (unsigned long)&ch9200_info,
406 },
407 {},
408};
409
410MODULE_DEVICE_TABLE(usb, ch9200_products);
411
412static struct usb_driver ch9200_driver = {
413 .name = "ch9200",
414 .id_table = ch9200_products,
415 .probe = usbnet_probe,
416 .disconnect = usbnet_disconnect,
417 .suspend = usbnet_suspend,
418 .resume = usbnet_resume,
419};
420
421module_usb_driver(ch9200_driver);
422
423MODULE_DESCRIPTION("QinHeng CH9200 USB Network device");
424MODULE_LICENSE("GPL");
425
