drivers/net/usb/r815x.c

   1 #include <linux/module.h>
   2 #include <linux/netdevice.h>
   3 #include <linux/mii.h>
   4 #include <linux/usb.h>
   5 #include <linux/usb/cdc.h>
   6 #include <linux/usb/usbnet.h>
   7
   8 #define RTL815x_REQT_READ       0xc0
   9 #define RTL815x_REQT_WRITE      0x40
  10 #define RTL815x_REQ_GET_REGS    0x05
  11 #define RTL815x_REQ_SET_REGS    0x05
  12
  13 #define MCU_TYPE_PLA            0x0100
  14 #define OCP_BASE                0xe86c
  15 #define BASE_MII                0xa400
  16
  17 #define BYTE_EN_DWORD           0xff
  18 #define BYTE_EN_WORD            0x33
  19 #define BYTE_EN_BYTE            0x11
  20
  21 #define R815x_PHY_ID            32
  22 #define REALTEK_VENDOR_ID       0x0bda
  23
  24
  25 static int pla_read_word(struct usb_device *udev, u16 index)
  26 {
  27         int data, ret;
  28         u8 shift = index & 2;
  29         __le32 ocp_data;
  30
  31         index &= ~3;
  32
  33         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  34                               RTL815x_REQ_GET_REGS, RTL815x_REQT_READ,
  35                               index, MCU_TYPE_PLA, &ocp_data, sizeof(ocp_data),
  36                               500);
  37         if (ret < 0)
  38                 return ret;
  39
  40         data = __le32_to_cpu(ocp_data);
  41         data >>= (shift * 8);
  42         data &= 0xffff;
  43
  44         return data;
  45 }
  46
  47 static int pla_write_word(struct usb_device *udev, u16 index, u32 data)
  48 {
  49         __le32 ocp_data;
  50         u32 mask = 0xffff;
  51         u16 byen = BYTE_EN_WORD;
  52         u8 shift = index & 2;
  53         int ret;
  54
  55         data &= mask;
  56
  57         if (shift) {
  58                 byen <<= shift;
  59                 mask <<= (shift * 8);
  60                 data <<= (shift * 8);
  61                 index &= ~3;
  62         }
  63
  64         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
  65                               RTL815x_REQ_GET_REGS, RTL815x_REQT_READ,
  66                               index, MCU_TYPE_PLA, &ocp_data, sizeof(ocp_data),
  67                               500);
  68         if (ret < 0)
  69                 return ret;
  70
  71         data |= __le32_to_cpu(ocp_data) & ~mask;
  72         ocp_data = __cpu_to_le32(data);
  73
  74         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  75                               RTL815x_REQ_SET_REGS, RTL815x_REQT_WRITE,
  76                               index, MCU_TYPE_PLA | byen, &ocp_data,
  77                               sizeof(ocp_data), 500);
  78
  79         return ret;
  80 }
  81
  82 static int ocp_reg_read(struct usbnet *dev, u16 addr)
  83 {
  84         u16 ocp_base, ocp_index;
  85         int ret;
  86
  87         ocp_base = addr & 0xf000;
  88         ret = pla_write_word(dev->udev, OCP_BASE, ocp_base);
  89         if (ret < 0)
  90                 goto out;
  91
  92         ocp_index = (addr & 0x0fff) | 0xb000;
  93         ret = pla_read_word(dev->udev, ocp_index);
  94
  95 out:
  96         return ret;
  97 }
  98
  99 static int ocp_reg_write(struct usbnet *dev, u16 addr, u16 data)
 100 {
 101         u16 ocp_base, ocp_index;
 102         int ret;
 103
 104         ocp_base = addr & 0xf000;
 105         ret = pla_write_word(dev->udev, OCP_BASE, ocp_base);
 106         if (ret < 0)
 107                 goto out1;
 108
 109         ocp_index = (addr & 0x0fff) | 0xb000;
 110         ret = pla_write_word(dev->udev, ocp_index, data);
 111
 112 out1:
 113         return ret;
 114 }
 115
 116 static int r815x_mdio_read(struct net_device *netdev, int phy_id, int reg)
 117 {
 118         struct usbnet *dev = netdev_priv(netdev);
 119
 120         if (phy_id != R815x_PHY_ID)
 121                 return -EINVAL;
 122
 123         return ocp_reg_read(dev, BASE_MII + reg * 2);
 124 }
 125
 126 static
 127 void r815x_mdio_write(struct net_device *netdev, int phy_id, int reg, int val)
 128 {
 129         struct usbnet *dev = netdev_priv(netdev);
 130
 131         if (phy_id != R815x_PHY_ID)
 132                 return;
 133
 134         ocp_reg_write(dev, BASE_MII + reg * 2, val);
 135 }
 136
 137 static int r8153_bind(struct usbnet *dev, struct usb_interface *intf)
 138 {
 139         int status;
 140
 141         status = usbnet_cdc_bind(dev, intf);
 142         if (status < 0)
 143                 return status;
 144
 145         dev->mii.dev = dev->net;
 146         dev->mii.mdio_read = r815x_mdio_read;
 147         dev->mii.mdio_write = r815x_mdio_write;
 148         dev->mii.phy_id_mask = 0x3f;
 149         dev->mii.reg_num_mask = 0x1f;
 150         dev->mii.phy_id = R815x_PHY_ID;
 151         dev->mii.supports_gmii = 1;
 152
 153         return 0;
 154 }
 155
 156 static int r8152_bind(struct usbnet *dev, struct usb_interface *intf)
 157 {
 158         int status;
 159
 160         status = usbnet_cdc_bind(dev, intf);
 161         if (status < 0)
 162                 return status;
 163
 164         dev->mii.dev = dev->net;
 165         dev->mii.mdio_read = r815x_mdio_read;
 166         dev->mii.mdio_write = r815x_mdio_write;
 167         dev->mii.phy_id_mask = 0x3f;
 168         dev->mii.reg_num_mask = 0x1f;
 169         dev->mii.phy_id = R815x_PHY_ID;
 170         dev->mii.supports_gmii = 0;
 171
 172         return 0;
 173 }
 174
 175 static const struct driver_info r8152_info = {
 176         .description =  "RTL8152 ECM Device",
 177         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 178         .bind =         r8152_bind,
 179         .unbind =       usbnet_cdc_unbind,
 180         .status =       usbnet_cdc_status,
 181         .manage_power = usbnet_manage_power,
 182 };
 183
 184 static const struct driver_info r8153_info = {
 185         .description =  "RTL8153 ECM Device",
 186         .flags =        FLAG_ETHER | FLAG_POINTTOPOINT,
 187         .bind =         r8153_bind,
 188         .unbind =       usbnet_cdc_unbind,
 189         .status =       usbnet_cdc_status,
 190         .manage_power = usbnet_manage_power,
 191 };
 192
 193 static const struct usb_device_id products[] = {
 194 {
 195         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
 196                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 197 #if defined(CONFIG_USB_RTL8152) || defined(CONFIG_USB_RTL8152_MODULE)
 198         .driver_info = 0,
 199 #else
 200         .driver_info = (unsigned long) &r8152_info,
 201 #endif
 202 },
 203
 204 {
 205         USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
 206                         USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
 207 #if defined(CONFIG_USB_RTL8153) || defined(CONFIG_USB_RTL8153_MODULE)
 208         .driver_info = 0,
 209 #else
 210         .driver_info = (unsigned long) &r8153_info,
 211 #endif
 212 },
 213
 214         { },            /* END */
 215 };
 216 MODULE_DEVICE_TABLE(usb, products);
 217
 218 static struct usb_driver r815x_driver = {
 219         .name =         "r815x",
 220         .id_table =     products,
 221         .probe =        usbnet_probe,
 222         .disconnect =   usbnet_disconnect,
 223         .suspend =      usbnet_suspend,
 224         .resume =       usbnet_resume,
 225         .reset_resume = usbnet_resume,
 226         .supports_autosuspend = 1,
 227         .disable_hub_initiated_lpm = 1,
 228 };
 229
 230 module_usb_driver(r815x_driver);
 231
 232 MODULE_AUTHOR("Hayes Wang");
 233 MODULE_DESCRIPTION("Realtek USB ECM device");
 234 MODULE_LICENSE("GPL");