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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, "Control_read() index=0x%02x size=%d\n",
115 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
133 return err;
134
135err_out:
136 return err;
137}
138
139static int control_write(struct usbnet *dev, unsigned char request,
140 unsigned short value, unsigned short index,
141 void *data, unsigned short size, int timeout)
142{
143 unsigned char *buf = NULL;
144 unsigned char request_type;
145 int err = 0;
146
147 if (request == REQUEST_WRITE)
148 request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
149 USB_RECIP_OTHER);
150 else
151 request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
152 USB_RECIP_DEVICE);
153
154 netdev_dbg(dev->net, "Control_write() index=0x%02x size=%d\n",
155 index, size);
156
157 if (data) {
158 buf = kmalloc(size, GFP_KERNEL);
159 if (!buf) {
160 err = -ENOMEM;
161 goto err_out;
162 }
163 memcpy(buf, data, size);
164 }
165
166 err = usb_control_msg(dev->udev,
167 usb_sndctrlpipe(dev->udev, 0),
168 request, request_type, value, index, buf, size,
169 timeout);
170 if (err >= 0 && err < size)
171 err = -EINVAL;
172 kfree(buf);
173
174 return 0;
175
176err_out:
177 return err;
178}
179
180static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc)
181{
182 struct usbnet *dev = netdev_priv(netdev);
183 unsigned char buff[2];
184
185 netdev_dbg(netdev, "ch9200_mdio_read phy_id:%02x loc:%02x\n",
186 phy_id, loc);
187
188 if (phy_id != 0)
189 return -ENODEV;
190
191 control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02,
192 CONTROL_TIMEOUT_MS);
193
194 return (buff[0] | buff[1] << 8);
195}
196
197static void ch9200_mdio_write(struct net_device *netdev,
198 int phy_id, int loc, int val)
199{
200 struct usbnet *dev = netdev_priv(netdev);
201 unsigned char buff[2];
202
203 netdev_dbg(netdev, "ch9200_mdio_write() phy_id=%02x loc:%02x\n",
204 phy_id, loc);
205
206 if (phy_id != 0)
207 return;
208
209 buff[0] = (unsigned char)val;
210 buff[1] = (unsigned char)(val >> 8);
211
212 control_write(dev, REQUEST_WRITE, 0, loc * 2, buff, 0x02,
213 CONTROL_TIMEOUT_MS);
214}
215
216static int ch9200_link_reset(struct usbnet *dev)
217{
218 struct ethtool_cmd ecmd;
219
220 mii_check_media(&dev->mii, 1, 1);
221 mii_ethtool_gset(&dev->mii, &ecmd);
222
223 netdev_dbg(dev->net, "link_reset() speed:%d duplex:%d\n",
224 ecmd.speed, ecmd.duplex);
225
226 return 0;
227}
228
229static void ch9200_status(struct usbnet *dev, struct urb *urb)
230{
231 int link;
232 unsigned char *buf;
233
234 if (urb->actual_length < 16)
235 return;
236
237 buf = urb->transfer_buffer;
238 link = !!(buf[0] & 0x01);
239
240 if (link) {
241 netif_carrier_on(dev->net);
242 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
243 } else {
244 netif_carrier_off(dev->net);
245 }
246}
247
248static struct sk_buff *ch9200_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
249 gfp_t flags)
250{
251 int i = 0;
252 int len = 0;
253 int tx_overhead = 0;
254
255 tx_overhead = 0x40;
256
257 len = skb->len;
258 if (skb_headroom(skb) < tx_overhead) {
259 struct sk_buff *skb2;
260
261 skb2 = skb_copy_expand(skb, tx_overhead, 0, flags);
262 dev_kfree_skb_any(skb);
263 skb = skb2;
264 if (!skb)
265 return NULL;
266 }
267
268 __skb_push(skb, tx_overhead);
269
270
271
272 if ((skb->len % dev->maxpacket) == 0)
273 len++;
274
275 skb->data[0] = len;
276 skb->data[1] = len >> 8;
277 skb->data[2] = 0x00;
278 skb->data[3] = 0x80;
279
280 for (i = 4; i < 48; i++)
281 skb->data[i] = 0x00;
282
283 skb->data[48] = len;
284 skb->data[49] = len >> 8;
285 skb->data[50] = 0x00;
286 skb->data[51] = 0x80;
287
288 for (i = 52; i < 64; i++)
289 skb->data[i] = 0x00;
290
291 return skb;
292}
293
294static int ch9200_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
295{
296 int len = 0;
297 int rx_overhead = 0;
298
299 rx_overhead = 64;
300
301 if (unlikely(skb->len < rx_overhead)) {
302 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
303 return 0;
304 }
305
306 len = (skb->data[skb->len - 16] | skb->data[skb->len - 15] << 8);
307 skb_trim(skb, len);
308
309 return 1;
310}
311
312static int get_mac_address(struct usbnet *dev, unsigned char *data)
313{
314 int err = 0;
315 unsigned char mac_addr[0x06];
316 int rd_mac_len = 0;
317
318 netdev_dbg(dev->net, "get_mac_address:\n\tusbnet VID:%0x PID:%0x\n",
319 dev->udev->descriptor.idVendor,
320 dev->udev->descriptor.idProduct);
321
322 memset(mac_addr, 0, sizeof(mac_addr));
323 rd_mac_len = control_read(dev, REQUEST_READ, 0,
324 MAC_REG_STATION_L, mac_addr, 0x02,
325 CONTROL_TIMEOUT_MS);
326 rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_M,
327 mac_addr + 2, 0x02, CONTROL_TIMEOUT_MS);
328 rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_H,
329 mac_addr + 4, 0x02, CONTROL_TIMEOUT_MS);
330 if (rd_mac_len != ETH_ALEN)
331 err = -EINVAL;
332
333 data[0] = mac_addr[5];
334 data[1] = mac_addr[4];
335 data[2] = mac_addr[3];
336 data[3] = mac_addr[2];
337 data[4] = mac_addr[1];
338 data[5] = mac_addr[0];
339
340 return err;
341}
342
343static int ch9200_bind(struct usbnet *dev, struct usb_interface *intf)
344{
345 int retval = 0;
346 unsigned char data[2];
347
348 retval = usbnet_get_endpoints(dev, intf);
349 if (retval)
350 return retval;
351
352 dev->mii.dev = dev->net;
353 dev->mii.mdio_read = ch9200_mdio_read;
354 dev->mii.mdio_write = ch9200_mdio_write;
355 dev->mii.reg_num_mask = 0x1f;
356
357 dev->mii.phy_id_mask = 0x1f;
358
359 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
360 dev->rx_urb_size = 24 * 64 + 16;
361 mii_nway_restart(&dev->mii);
362
363 data[0] = 0x01;
364 data[1] = 0x0F;
365 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_THRESHOLD, data,
366 0x02, CONTROL_TIMEOUT_MS);
367
368 data[0] = 0xA0;
369 data[1] = 0x90;
370 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FIFO_DEPTH, data,
371 0x02, CONTROL_TIMEOUT_MS);
372
373 data[0] = 0x30;
374 data[1] = 0x00;
375 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_PAUSE, data,
376 0x02, CONTROL_TIMEOUT_MS);
377
378 data[0] = 0x17;
379 data[1] = 0xD8;
380 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FLOW_CONTROL,
381 data, 0x02, CONTROL_TIMEOUT_MS);
382
383
384 data[0] = 0x01;
385 data[1] = 0x00;
386 retval = control_write(dev, REQUEST_WRITE, 0, 254, data, 0x02,
387 CONTROL_TIMEOUT_MS);
388
389 data[0] = 0x5F;
390 data[1] = 0x0D;
391 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_CTRL, data, 0x02,
392 CONTROL_TIMEOUT_MS);
393
394 retval = get_mac_address(dev, dev->net->dev_addr);
395
396 return retval;
397}
398
399static const struct driver_info ch9200_info = {
400 .description = "CH9200 USB to Network Adaptor",
401 .flags = FLAG_ETHER,
402 .bind = ch9200_bind,
403 .rx_fixup = ch9200_rx_fixup,
404 .tx_fixup = ch9200_tx_fixup,
405 .status = ch9200_status,
406 .link_reset = ch9200_link_reset,
407 .reset = ch9200_link_reset,
408};
409
410static const struct usb_device_id ch9200_products[] = {
411 {
412 USB_DEVICE(0x1A86, 0xE092),
413 .driver_info = (unsigned long)&ch9200_info,
414 },
415 {},
416};
417
418MODULE_DEVICE_TABLE(usb, ch9200_products);
419
420static struct usb_driver ch9200_driver = {
421 .name = "ch9200",
422 .id_table = ch9200_products,
423 .probe = usbnet_probe,
424 .disconnect = usbnet_disconnect,
425 .suspend = usbnet_suspend,
426 .resume = usbnet_resume,
427};
428
429module_usb_driver(ch9200_driver);
430
431MODULE_DESCRIPTION("QinHeng CH9200 USB Network device");
432MODULE_LICENSE("GPL");
433
