target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Based on Atheros' AG7100 driver
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include "ag71xx.h"
  15
  16 static unsigned char *ag71xx_speed_str(struct ag71xx *ag)
  17 {
  18         switch (ag->speed) {
  19         case SPEED_1000:
  20                 return "1000";
  21         case SPEED_100:
  22                 return "100";
  23         case SPEED_10:
  24                 return "10";
  25         }
  26
  27         return "?";
  28 }
  29
  30 #define AR71XX_PLL_VAL_1000     0x00110000
  31 #define AR71XX_PLL_VAL_100      0x00001099
  32 #define AR71XX_PLL_VAL_10       0x00991099
  33
  34 #define AR91XX_PLL_VAL_1000     0x1a000000
  35 #define AR91XX_PLL_VAL_100      0x13000a44
  36 #define AR91XX_PLL_VAL_10       0x00441099
  37
  38 static void ag71xx_phy_link_update(struct ag71xx *ag)
  39 {
  40         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
  41         u32 cfg2;
  42         u32 ifctl;
  43         u32 pll;
  44         u32 fifo5;
  45         u32 mii_speed;
  46
  47         if (!ag->link) {
  48                 netif_carrier_off(ag->dev);
  49                 if (netif_msg_link(ag))
  50                         printk(KERN_INFO "%s: link down\n", ag->dev->name);
  51                 return;
  52         }
  53
  54         cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
  55         cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
  56         cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
  57
  58         ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
  59         ifctl &= ~(MAC_IFCTL_SPEED);
  60
  61         fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
  62         fifo5 &= ~FIFO_CFG5_BM;
  63
  64         switch (ag->speed) {
  65         case SPEED_1000:
  66                 mii_speed =  MII_CTRL_SPEED_1000;
  67                 cfg2 |= MAC_CFG2_IF_1000;
  68                 pll = pdata->is_ar91xx ? AR91XX_PLL_VAL_1000
  69                                        : AR71XX_PLL_VAL_1000;
  70                 fifo5 |= FIFO_CFG5_BM;
  71                 break;
  72         case SPEED_100:
  73                 mii_speed = MII_CTRL_SPEED_100;
  74                 cfg2 |= MAC_CFG2_IF_10_100;
  75                 ifctl |= MAC_IFCTL_SPEED;
  76                 pll = pdata->is_ar91xx ? AR91XX_PLL_VAL_100
  77                                        : AR71XX_PLL_VAL_100;
  78                 break;
  79         case SPEED_10:
  80                 mii_speed = MII_CTRL_SPEED_10;
  81                 cfg2 |= MAC_CFG2_IF_10_100;
  82                 pll = pdata->is_ar91xx ? AR91XX_PLL_VAL_10
  83                                        : AR71XX_PLL_VAL_10;
  84                 break;
  85         default:
  86                 BUG();
  87                 return;
  88         }
  89
  90         ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3,
  91                         pdata->is_ar91xx ? 0x780fff : 0x008001ff);
  92         pdata->set_pll(pll);
  93         ag71xx_mii_ctrl_set_speed(ag, mii_speed);
  94
  95         ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
  96         ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
  97         ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
  98
  99         netif_carrier_on(ag->dev);
 100         if (netif_msg_link(ag))
 101                 printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n",
 102                         ag->dev->name,
 103                         ag71xx_speed_str(ag),
 104                         (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
 105
 106         DBG("%s: fifo_cfg0=%#x, fifo_cfg1=%#x, fifo_cfg2=%#x\n",
 107                 ag->dev->name,
 108                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
 109                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
 110                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
 111
 112         DBG("%s: fifo_cfg3=%#x, fifo_cfg4=%#x, fifo_cfg5=%#x\n",
 113                 ag->dev->name,
 114                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
 115                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
 116                 ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
 117
 118         DBG("%s: mac_cfg2=%#x, mac_ifctl=%#x, mii_ctrl=%#x\n",
 119                 ag->dev->name,
 120                 ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
 121                 ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
 122                 ag71xx_mii_ctrl_rr(ag));
 123 }
 124
 125 static void ag71xx_phy_link_adjust(struct net_device *dev)
 126 {
 127         struct ag71xx *ag = netdev_priv(dev);
 128         struct phy_device *phydev = ag->phy_dev;
 129         unsigned long flags;
 130         int status_change = 0;
 131
 132         spin_lock_irqsave(&ag->lock, flags);
 133
 134         if (phydev->link) {
 135                 if (ag->duplex != phydev->duplex
 136                     || ag->speed != phydev->speed) {
 137                         status_change = 1;
 138                 }
 139         }
 140
 141         if (phydev->link != ag->link)
 142                 status_change = 1;
 143
 144         ag->link = phydev->link;
 145         ag->duplex = phydev->duplex;
 146         ag->speed = phydev->speed;
 147
 148         if (status_change)
 149                 ag71xx_phy_link_update(ag);
 150
 151         spin_unlock_irqrestore(&ag->lock, flags);
 152 }
 153
 154 void ag71xx_phy_start(struct ag71xx *ag)
 155 {
 156         if (ag->phy_dev) {
 157                 phy_start(ag->phy_dev);
 158         } else {
 159                 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 160
 161                 ag->duplex = pdata->duplex;
 162                 ag->speed = pdata->speed;
 163                 ag->link = 1;
 164                 ag71xx_phy_link_update(ag);
 165         }
 166 }
 167
 168 void ag71xx_phy_stop(struct ag71xx *ag)
 169 {
 170         if (ag->phy_dev) {
 171                 phy_stop(ag->phy_dev);
 172         } else {
 173                 ag->duplex = -1;
 174                 ag->link = 0;
 175                 ag->speed = 0;
 176                 ag71xx_phy_link_update(ag);
 177         }
 178 }
 179
 180 static int ag71xx_phy_connect_fixed(struct ag71xx *ag)
 181 {
 182         struct net_device *dev = ag->dev;
 183         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 184         int ret = 0;
 185
 186         /* use fixed settings */
 187         switch (pdata->speed) {
 188         case SPEED_10:
 189         case SPEED_100:
 190         case SPEED_1000:
 191                 break;
 192         default:
 193                 printk(KERN_ERR "%s: invalid speed specified\n",
 194                         dev->name);
 195                 ret = -EINVAL;
 196                 break;
 197         }
 198
 199         return ret;
 200 }
 201
 202 static int ag71xx_phy_connect_multi(struct ag71xx *ag)
 203 {
 204         struct net_device *dev = ag->dev;
 205         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 206         struct phy_device *phydev = NULL;
 207         int phy_count = 0;
 208         int phy_addr;
 209         int ret = 0;
 210
 211         for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
 212                 if (!(pdata->phy_mask & (1 << phy_addr)))
 213                         continue;
 214
 215                 if (ag->mii_bus->phy_map[phy_addr] == NULL)
 216                         continue;
 217
 218                 DBG("%s: PHY found at %s, uid=%08x\n",
 219                         dev->name,
 220                         ag->mii_bus->phy_map[phy_addr]->dev.bus_id,
 221                         ag->mii_bus->phy_map[phy_addr]->phy_id);
 222
 223                 if (phydev == NULL)
 224                         phydev = ag->mii_bus->phy_map[phy_addr];
 225
 226                 phy_count++;
 227         }
 228
 229         switch (phy_count) {
 230         case 0:
 231                 printk(KERN_ERR "%s: no PHY found with phy_mask=%08x\n",
 232                         dev->name, pdata->phy_mask);
 233                 ret = -ENODEV;
 234                 break;
 235         case 1:
 236                 ag->phy_dev = phy_connect(dev, phydev->dev.bus_id,
 237                         &ag71xx_phy_link_adjust, 0, pdata->phy_if_mode);
 238
 239                 if (IS_ERR(ag->phy_dev)) {
 240                         printk(KERN_ERR "%s: could not connect to PHY at %s\n",
 241                                 dev->name, phydev->dev.bus_id);
 242                         return PTR_ERR(ag->phy_dev);
 243                 }
 244
 245                 /* mask with MAC supported features */
 246                 if (pdata->has_gbit)
 247                         phydev->supported &= PHY_GBIT_FEATURES;
 248                 else
 249                         phydev->supported &= PHY_BASIC_FEATURES;
 250
 251                 phydev->advertising = phydev->supported;
 252
 253                 printk(KERN_DEBUG "%s: connected to PHY at %s "
 254                         "[uid=%08x, driver=%s]\n",
 255                         dev->name, phydev->dev.bus_id,
 256                         phydev->phy_id, phydev->drv->name);
 257
 258                 ag->link = 0;
 259                 ag->speed = 0;
 260                 ag->duplex = -1;
 261                 break;
 262
 263         default:
 264                 printk(KERN_DEBUG "%s: connected to %d PHYs\n",
 265                         dev->name, phy_count);
 266                 ret = ag71xx_phy_connect_fixed(ag);
 267                 break;
 268         }
 269
 270         return ret;
 271 }
 272
 273 int ag71xx_phy_connect(struct ag71xx *ag)
 274 {
 275         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 276
 277         if (pdata->phy_mask)
 278                 return ag71xx_phy_connect_multi(ag);
 279
 280         return ag71xx_phy_connect_fixed(ag);
 281 }
 282
 283 void ag71xx_phy_disconnect(struct ag71xx *ag)
 284 {
 285         if (ag->phy_dev)
 286                 phy_disconnect(ag->phy_dev);
 287 }