1 files changed, 432 insertions, 0 deletions

diff --git a/drivers/net/usb/ch9200.c b/drivers/net/usb/ch9200.c
new file mode 100644
index 000000000000..5e151e6a3e09
--- /dev/null
+++ b/drivers/net/usb/ch9200.c
@@ -0,0 +1,432 @@
+/*
+ * USB 10M/100M ethernet adapter
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/stddef.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/usb.h>
+#include <linux/crc32.h>
+#include <linux/usb/usbnet.h>
+#include <linux/slab.h>
+
+#define CH9200_VID              0x1A86
+#define CH9200_PID_E092         0xE092
+
+#define CTRL_TIMEOUT_MS         1000
+
+#define CONTROL_TIMEOUT_MS 1000
+
+#define REQUEST_READ    0x0E
+#define REQUEST_WRITE   0x0F
+
+/* Address space:
+ * 00-63 : MII
+ * 64-128: MAC
+ *
+ * Note: all accesses must be 16-bit
+ */
+
+#define MAC_REG_CTRL 64
+#define MAC_REG_STATUS 66
+#define MAC_REG_INTERRUPT_MASK 68
+#define MAC_REG_PHY_COMMAND 70
+#define MAC_REG_PHY_DATA 72
+#define MAC_REG_STATION_L 74
+#define MAC_REG_STATION_M 76
+#define MAC_REG_STATION_H 78
+#define MAC_REG_HASH_L 80
+#define MAC_REG_HASH_M1 82
+#define MAC_REG_HASH_M2 84
+#define MAC_REG_HASH_H 86
+#define MAC_REG_THRESHOLD 88
+#define MAC_REG_FIFO_DEPTH 90
+#define MAC_REG_PAUSE 92
+#define MAC_REG_FLOW_CONTROL 94
+
+/* Control register bits
+ *
+ * Note: bits 13 and 15 are reserved
+ */
+#define LOOPBACK                (0x01 << 14)
+#define BASE100X                (0x01 << 12)
+#define MBPS_10                 (0x01 << 11)
+#define DUPLEX_MODE             (0x01 << 10)
+#define PAUSE_FRAME             (0x01 << 9)
+#define PROMISCUOUS             (0x01 << 8)
+#define MULTICAST               (0x01 << 7)
+#define BROADCAST               (0x01 << 6)
+#define HASH                    (0x01 << 5)
+#define APPEND_PAD              (0x01 << 4)
+#define APPEND_CRC              (0x01 << 3)
+#define TRANSMITTER_ACTION      (0x01 << 2)
+#define RECEIVER_ACTION         (0x01 << 1)
+#define DMA_ACTION              (0x01 << 0)
+
+/* Status register bits
+ *
+ * Note: bits 7-15 are reserved
+ */
+#define ALIGNMENT               (0x01 << 6)
+#define FIFO_OVER_RUN           (0x01 << 5)
+#define FIFO_UNDER_RUN          (0x01 << 4)
+#define RX_ERROR                (0x01 << 3)
+#define RX_COMPLETE             (0x01 << 2)
+#define TX_ERROR                (0x01 << 1)
+#define TX_COMPLETE             (0x01 << 0)
+
+/* FIFO depth register bits
+ *
+ * Note: bits 6 and 14 are reserved
+ */
+
+#define ETH_TXBD                (0x01 << 15)
+#define ETN_TX_FIFO_DEPTH       (0x01 << 8)
+#define ETH_RXBD                (0x01 << 7)
+#define ETH_RX_FIFO_DEPTH       (0x01 << 0)
+
+static int control_read(struct usbnet *dev,
+                        unsigned char request, unsigned short value,
+                        unsigned short index, void *data, unsigned short size,
+                        int timeout)
+{
+        unsigned char *buf = NULL;
+        unsigned char request_type;
+        int err = 0;
+
+        if (request == REQUEST_READ)
+                request_type = (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER);
+        else
+                request_type = (USB_DIR_IN | USB_TYPE_VENDOR |
+                                USB_RECIP_DEVICE);
+
+        netdev_dbg(dev->net, "Control_read() index=0x%02x size=%d\n",
+                   index, size);
+
+        buf = kmalloc(size, GFP_KERNEL);
+        if (!buf) {
+                err = -ENOMEM;
+                goto err_out;
+        }
+
+        err = usb_control_msg(dev->udev,
+                              usb_rcvctrlpipe(dev->udev, 0),
+                              request, request_type, value, index, buf, size,
+                              timeout);
+        if (err == size)
+                memcpy(data, buf, size);
+        else if (err >= 0)
+                err = -EINVAL;
+        kfree(buf);
+
+        return err;
+
+err_out:
+        return err;
+}
+
+static int control_write(struct usbnet *dev, unsigned char request,
+                         unsigned short value, unsigned short index,
+                         void *data, unsigned short size, int timeout)
+{
+        unsigned char *buf = NULL;
+        unsigned char request_type;
+        int err = 0;
+
+        if (request == REQUEST_WRITE)
+                request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
+                                USB_RECIP_OTHER);
+        else
+                request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
+                                USB_RECIP_DEVICE);
+
+        netdev_dbg(dev->net, "Control_write() index=0x%02x size=%d\n",
+                   index, size);
+
+        if (data) {
+                buf = kmalloc(size, GFP_KERNEL);
+                if (!buf) {
+                        err = -ENOMEM;
+                        goto err_out;
+                }
+                memcpy(buf, data, size);
+        }
+
+        err = usb_control_msg(dev->udev,
+                              usb_sndctrlpipe(dev->udev, 0),
+                              request, request_type, value, index, buf, size,
+                              timeout);
+        if (err >= 0 && err < size)
+                err = -EINVAL;
+        kfree(buf);
+
+        return 0;
+
+err_out:
+        return err;
+}
+
+static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc)
+{
+        struct usbnet *dev = netdev_priv(netdev);
+        unsigned char buff[2];
+
+        netdev_dbg(netdev, "ch9200_mdio_read phy_id:%02x loc:%02x\n",
+                   phy_id, loc);
+
+        if (phy_id != 0)
+                return -ENODEV;
+
+        control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02,
+                     CONTROL_TIMEOUT_MS);
+
+        return (buff[0] | buff[1] << 8);
+}
+
+static void ch9200_mdio_write(struct net_device *netdev,
+                              int phy_id, int loc, int val)
+{
+        struct usbnet *dev = netdev_priv(netdev);
+        unsigned char buff[2];
+
+        netdev_dbg(netdev, "ch9200_mdio_write() phy_id=%02x loc:%02x\n",
+                   phy_id, loc);
+
+        if (phy_id != 0)
+                return;
+
+        buff[0] = (unsigned char)val;
+        buff[1] = (unsigned char)(val >> 8);
+
+        control_write(dev, REQUEST_WRITE, 0, loc * 2, buff, 0x02,
+                      CONTROL_TIMEOUT_MS);
+}
+
+static int ch9200_link_reset(struct usbnet *dev)
+{
+        struct ethtool_cmd ecmd;
+
+        mii_check_media(&dev->mii, 1, 1);
+        mii_ethtool_gset(&dev->mii, &ecmd);
+
+        netdev_dbg(dev->net, "link_reset() speed:%d duplex:%d\n",
+                   ecmd.speed, ecmd.duplex);
+
+        return 0;
+}
+
+static void ch9200_status(struct usbnet *dev, struct urb *urb)
+{
+        int link;
+        unsigned char *buf;
+
+        if (urb->actual_length < 16)
+                return;
+
+        buf = urb->transfer_buffer;
+        link = !!(buf[0] & 0x01);
+
+        if (link) {
+                netif_carrier_on(dev->net);
+                usbnet_defer_kevent(dev, EVENT_LINK_RESET);
+        } else {
+                netif_carrier_off(dev->net);
+        }
+}
+
+static struct sk_buff *ch9200_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
+                                       gfp_t flags)
+{
+        int i = 0;
+        int len = 0;
+        int tx_overhead = 0;
+
+        tx_overhead = 0x40;
+
+        len = skb->len;
+        if (skb_headroom(skb) < tx_overhead) {
+                struct sk_buff *skb2;
+
+                skb2 = skb_copy_expand(skb, tx_overhead, 0, flags);
+                dev_kfree_skb_any(skb);
+                skb = skb2;
+                if (!skb)
+                        return NULL;
+        }
+
+        __skb_push(skb, tx_overhead);
+        /* usbnet adds padding if length is a multiple of packet size
+         * if so, adjust length value in header
+         */
+        if ((skb->len % dev->maxpacket) == 0)
+                len++;
+
+        skb->data[0] = len;
+        skb->data[1] = len >> 8;
+        skb->data[2] = 0x00;
+        skb->data[3] = 0x80;
+
+        for (i = 4; i < 48; i++)
+                skb->data[i] = 0x00;
+
+        skb->data[48] = len;
+        skb->data[49] = len >> 8;
+        skb->data[50] = 0x00;
+        skb->data[51] = 0x80;
+
+        for (i = 52; i < 64; i++)
+                skb->data[i] = 0x00;
+
+        return skb;
+}
+
+static int ch9200_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+{
+        int len = 0;
+        int rx_overhead = 0;
+
+        rx_overhead = 64;
+
+        if (unlikely(skb->len < rx_overhead)) {
+                dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
+                return 0;
+        }
+
+        len = (skb->data[skb->len - 16] | skb->data[skb->len - 15] << 8);
+        skb_trim(skb, len);
+
+        return 1;
+}
+
+static int get_mac_address(struct usbnet *dev, unsigned char *data)
+{
+        int err = 0;
+        unsigned char mac_addr[0x06];
+        int rd_mac_len = 0;
+
+        netdev_dbg(dev->net, "get_mac_address:\n\tusbnet VID:%0x PID:%0x\n",
+                   dev->udev->descriptor.idVendor,
+                   dev->udev->descriptor.idProduct);
+
+        memset(mac_addr, 0, sizeof(mac_addr));
+        rd_mac_len = control_read(dev, REQUEST_READ, 0,
+                                  MAC_REG_STATION_L, mac_addr, 0x02,
+                                  CONTROL_TIMEOUT_MS);
+        rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_M,
+                                   mac_addr + 2, 0x02, CONTROL_TIMEOUT_MS);
+        rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_H,
+                                   mac_addr + 4, 0x02, CONTROL_TIMEOUT_MS);
+        if (rd_mac_len != ETH_ALEN)
+                err = -EINVAL;
+
+        data[0] = mac_addr[5];
+        data[1] = mac_addr[4];
+        data[2] = mac_addr[3];
+        data[3] = mac_addr[2];
+        data[4] = mac_addr[1];
+        data[5] = mac_addr[0];
+
+        return err;
+}
+
+static int ch9200_bind(struct usbnet *dev, struct usb_interface *intf)
+{
+        int retval = 0;
+        unsigned char data[2];
+
+        retval = usbnet_get_endpoints(dev, intf);
+        if (retval)
+                return retval;
+
+        dev->mii.dev = dev->net;
+        dev->mii.mdio_read = ch9200_mdio_read;
+        dev->mii.mdio_write = ch9200_mdio_write;
+        dev->mii.reg_num_mask = 0x1f;
+
+        dev->mii.phy_id_mask = 0x1f;
+
+        dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
+        dev->rx_urb_size = 24 * 64 + 16;
+        mii_nway_restart(&dev->mii);
+
+        data[0] = 0x01;
+        data[1] = 0x0F;
+        retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_THRESHOLD, data,
+                               0x02, CONTROL_TIMEOUT_MS);
+
+        data[0] = 0xA0;
+        data[1] = 0x90;
+        retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FIFO_DEPTH, data,
+                               0x02, CONTROL_TIMEOUT_MS);
+
+        data[0] = 0x30;
+        data[1] = 0x00;
+        retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_PAUSE, data,
+                               0x02, CONTROL_TIMEOUT_MS);
+
+        data[0] = 0x17;
+        data[1] = 0xD8;
+        retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FLOW_CONTROL,
+                               data, 0x02, CONTROL_TIMEOUT_MS);
+
+        /* Undocumented register */
+        data[0] = 0x01;
+        data[1] = 0x00;
+        retval = control_write(dev, REQUEST_WRITE, 0, 254, data, 0x02,
+                               CONTROL_TIMEOUT_MS);
+
+        data[0] = 0x5F;
+        data[1] = 0x0D;
+        retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_CTRL, data, 0x02,
+                               CONTROL_TIMEOUT_MS);
+
+        retval = get_mac_address(dev, dev->net->dev_addr);
+
+        return retval;
+}
+
+static const struct driver_info ch9200_info = {
+        .description = "CH9200 USB to Network Adaptor",
+        .flags = FLAG_ETHER,
+        .bind = ch9200_bind,
+        .rx_fixup = ch9200_rx_fixup,
+        .tx_fixup = ch9200_tx_fixup,
+        .status = ch9200_status,
+        .link_reset = ch9200_link_reset,
+        .reset = ch9200_link_reset,
+};
+
+static const struct usb_device_id ch9200_products[] = {
+        {
+         USB_DEVICE(0x1A86, 0xE092),
+         .driver_info = (unsigned long)&ch9200_info,
+         },
+        {},
+};
+
+MODULE_DEVICE_TABLE(usb, ch9200_products);
+
+static struct usb_driver ch9200_driver = {
+        .name = "ch9200",
+        .id_table = ch9200_products,
+        .probe = usbnet_probe,
+        .disconnect = usbnet_disconnect,
+        .suspend = usbnet_suspend,
+        .resume = usbnet_resume,
+};
+
+module_usb_driver(ch9200_driver);
+
+MODULE_DESCRIPTION("QinHeng CH9200 USB Network device");
+MODULE_LICENSE("GPL");