1 /* 2 * USB 10M/100M ethernet adapter 3 * 4 * This file is licensed under the terms of the GNU General Public License 5 * version 2. This program is licensed "as is" without any warranty of any 6 * kind, whether express or implied 7 * 8 */ 9 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 /* Address space: 35 * 00-63 : MII 36 * 64-128: MAC 37 * 38 * Note: all accesses must be 16-bit 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 /* Control register bits 59 * 60 * Note: bits 13 and 15 are reserved 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 /* Status register bits 78 * 79 * Note: bits 7-15 are reserved 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 /* FIFO depth register bits 90 * 91 * Note: bits 6 and 14 are reserved 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 99 static 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; 134 135 err_out: 136 return err; 137 } 138 139 static 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 = kmemdup(data, size, GFP_KERNEL); 159 if (!buf) { 160 err = -ENOMEM; 161 goto err_out; 162 } 163 } 164 165 err = usb_control_msg(dev->udev, 166 usb_sndctrlpipe(dev->udev, 0), 167 request, request_type, value, index, buf, size, 168 timeout); 169 if (err >= 0 && err < size) 170 err = -EINVAL; 171 kfree(buf); 172 173 return 0; 174 175 err_out: 176 return err; 177 } 178 179 static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc) 180 { 181 struct usbnet *dev = netdev_priv(netdev); 182 unsigned char buff[2]; 183 184 netdev_dbg(netdev, "ch9200_mdio_read phy_id:%02x loc:%02x\n", 185 phy_id, loc); 186 187 if (phy_id != 0) 188 return -ENODEV; 189 190 control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02, 191 CONTROL_TIMEOUT_MS); 192 193 return (buff[0] | buff[1] << 8); 194 } 195 196 static void ch9200_mdio_write(struct net_device *netdev, 197 int phy_id, int loc, int val) 198 { 199 struct usbnet *dev = netdev_priv(netdev); 200 unsigned char buff[2]; 201 202 netdev_dbg(netdev, "ch9200_mdio_write() phy_id=%02x loc:%02x\n", 203 phy_id, loc); 204 205 if (phy_id != 0) 206 return; 207 208 buff[0] = (unsigned char)val; 209 buff[1] = (unsigned char)(val >> 8); 210 211 control_write(dev, REQUEST_WRITE, 0, loc * 2, buff, 0x02, 212 CONTROL_TIMEOUT_MS); 213 } 214 215 static int ch9200_link_reset(struct usbnet *dev) 216 { 217 struct ethtool_cmd ecmd; 218 219 mii_check_media(&dev->mii, 1, 1); 220 mii_ethtool_gset(&dev->mii, &ecmd); 221 222 netdev_dbg(dev->net, "link_reset() speed:%d duplex:%d\n", 223 ecmd.speed, ecmd.duplex); 224 225 return 0; 226 } 227 228 static void ch9200_status(struct usbnet *dev, struct urb *urb) 229 { 230 int link; 231 unsigned char *buf; 232 233 if (urb->actual_length < 16) 234 return; 235 236 buf = urb->transfer_buffer; 237 link = !!(buf[0] & 0x01); 238 239 if (link) { 240 netif_carrier_on(dev->net); 241 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 242 } else { 243 netif_carrier_off(dev->net); 244 } 245 } 246 247 static struct sk_buff *ch9200_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 248 gfp_t flags) 249 { 250 int i = 0; 251 int len = 0; 252 int tx_overhead = 0; 253 254 tx_overhead = 0x40; 255 256 len = skb->len; 257 if (skb_cow_head(skb, tx_overhead)) { 258 dev_kfree_skb_any(skb); 259 return NULL; 260 } 261 262 __skb_push(skb, tx_overhead); 263 /* usbnet adds padding if length is a multiple of packet size 264 * if so, adjust length value in header 265 */ 266 if ((skb->len % dev->maxpacket) == 0) 267 len++; 268 269 skb->data[0] = len; 270 skb->data[1] = len >> 8; 271 skb->data[2] = 0x00; 272 skb->data[3] = 0x80; 273 274 for (i = 4; i < 48; i++) 275 skb->data[i] = 0x00; 276 277 skb->data[48] = len; 278 skb->data[49] = len >> 8; 279 skb->data[50] = 0x00; 280 skb->data[51] = 0x80; 281 282 for (i = 52; i < 64; i++) 283 skb->data[i] = 0x00; 284 285 return skb; 286 } 287 288 static int ch9200_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 289 { 290 int len = 0; 291 int rx_overhead = 0; 292 293 rx_overhead = 64; 294 295 if (unlikely(skb->len < rx_overhead)) { 296 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n"); 297 return 0; 298 } 299 300 len = (skb->data[skb->len - 16] | skb->data[skb->len - 15] << 8); 301 skb_trim(skb, len); 302 303 return 1; 304 } 305 306 static int get_mac_address(struct usbnet *dev, unsigned char *data) 307 { 308 int err = 0; 309 unsigned char mac_addr[0x06]; 310 int rd_mac_len = 0; 311 312 netdev_dbg(dev->net, "get_mac_address:\n\tusbnet VID:%0x PID:%0x\n", 313 dev->udev->descriptor.idVendor, 314 dev->udev->descriptor.idProduct); 315 316 memset(mac_addr, 0, sizeof(mac_addr)); 317 rd_mac_len = control_read(dev, REQUEST_READ, 0, 318 MAC_REG_STATION_L, mac_addr, 0x02, 319 CONTROL_TIMEOUT_MS); 320 rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_M, 321 mac_addr + 2, 0x02, CONTROL_TIMEOUT_MS); 322 rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_H, 323 mac_addr + 4, 0x02, CONTROL_TIMEOUT_MS); 324 if (rd_mac_len != ETH_ALEN) 325 err = -EINVAL; 326 327 data[0] = mac_addr[5]; 328 data[1] = mac_addr[4]; 329 data[2] = mac_addr[3]; 330 data[3] = mac_addr[2]; 331 data[4] = mac_addr[1]; 332 data[5] = mac_addr[0]; 333 334 return err; 335 } 336 337 static int ch9200_bind(struct usbnet *dev, struct usb_interface *intf) 338 { 339 int retval = 0; 340 unsigned char data[2]; 341 342 retval = usbnet_get_endpoints(dev, intf); 343 if (retval) 344 return retval; 345 346 dev->mii.dev = dev->net; 347 dev->mii.mdio_read = ch9200_mdio_read; 348 dev->mii.mdio_write = ch9200_mdio_write; 349 dev->mii.reg_num_mask = 0x1f; 350 351 dev->mii.phy_id_mask = 0x1f; 352 353 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 354 dev->rx_urb_size = 24 * 64 + 16; 355 mii_nway_restart(&dev->mii); 356 357 data[0] = 0x01; 358 data[1] = 0x0F; 359 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_THRESHOLD, data, 360 0x02, CONTROL_TIMEOUT_MS); 361 362 data[0] = 0xA0; 363 data[1] = 0x90; 364 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FIFO_DEPTH, data, 365 0x02, CONTROL_TIMEOUT_MS); 366 367 data[0] = 0x30; 368 data[1] = 0x00; 369 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_PAUSE, data, 370 0x02, CONTROL_TIMEOUT_MS); 371 372 data[0] = 0x17; 373 data[1] = 0xD8; 374 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FLOW_CONTROL, 375 data, 0x02, CONTROL_TIMEOUT_MS); 376 377 /* Undocumented register */ 378 data[0] = 0x01; 379 data[1] = 0x00; 380 retval = control_write(dev, REQUEST_WRITE, 0, 254, data, 0x02, 381 CONTROL_TIMEOUT_MS); 382 383 data[0] = 0x5F; 384 data[1] = 0x0D; 385 retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_CTRL, data, 0x02, 386 CONTROL_TIMEOUT_MS); 387 388 retval = get_mac_address(dev, dev->net->dev_addr); 389 390 return retval; 391 } 392 393 static const struct driver_info ch9200_info = { 394 .description = "CH9200 USB to Network Adaptor", 395 .flags = FLAG_ETHER, 396 .bind = ch9200_bind, 397 .rx_fixup = ch9200_rx_fixup, 398 .tx_fixup = ch9200_tx_fixup, 399 .status = ch9200_status, 400 .link_reset = ch9200_link_reset, 401 .reset = ch9200_link_reset, 402 }; 403 404 static const struct usb_device_id ch9200_products[] = { 405 { 406 USB_DEVICE(0x1A86, 0xE092), 407 .driver_info = (unsigned long)&ch9200_info, 408 }, 409 {}, 410 }; 411 412 MODULE_DEVICE_TABLE(usb, ch9200_products); 413 414 static struct usb_driver ch9200_driver = { 415 .name = "ch9200", 416 .id_table = ch9200_products, 417 .probe = usbnet_probe, 418 .disconnect = usbnet_disconnect, 419 .suspend = usbnet_suspend, 420 .resume = usbnet_resume, 421 }; 422 423 module_usb_driver(ch9200_driver); 424 425 MODULE_DESCRIPTION("QinHeng CH9200 USB Network device"); 426 MODULE_LICENSE("GPL"); 427