drivers/net/cxgb3/ael1002.c

   1 /*
   2  * Copyright (c) 2005-2007 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include "common.h"
  33 #include "regs.h"
  34
  35 enum {
  36         AEL100X_TX_DISABLE = 9,
  37         AEL100X_TX_CONFIG1 = 0xc002,
  38         AEL1002_PWR_DOWN_HI = 0xc011,
  39         AEL1002_PWR_DOWN_LO = 0xc012,
  40         AEL1002_XFI_EQL = 0xc015,
  41         AEL1002_LB_EN = 0xc017,
  42
  43         LASI_CTRL = 0x9002,
  44         LASI_STAT = 0x9005
  45 };
  46
  47 static void ael100x_txon(struct cphy *phy)
  48 {
  49         int tx_on_gpio = phy->addr == 0 ? F_GPIO7_OUT_VAL : F_GPIO2_OUT_VAL;
  50
  51         msleep(100);
  52         t3_set_reg_field(phy->adapter, A_T3DBG_GPIO_EN, 0, tx_on_gpio);
  53         msleep(30);
  54 }
  55
  56 static int ael1002_power_down(struct cphy *phy, int enable)
  57 {
  58         int err;
  59
  60         err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL100X_TX_DISABLE, !!enable);
  61         if (!err)
  62                 err = t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR,
  63                                           BMCR_PDOWN, enable ? BMCR_PDOWN : 0);
  64         return err;
  65 }
  66
  67 static int ael1002_reset(struct cphy *phy, int wait)
  68 {
  69         int err;
  70
  71         if ((err = ael1002_power_down(phy, 0)) ||
  72             (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL100X_TX_CONFIG1, 1)) ||
  73             (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL1002_PWR_DOWN_HI, 0)) ||
  74             (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL1002_PWR_DOWN_LO, 0)) ||
  75             (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL1002_XFI_EQL, 0x18)) ||
  76             (err = t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, AEL1002_LB_EN,
  77                                        0, 1 << 5)))
  78                 return err;
  79         return 0;
  80 }
  81
  82 static int ael1002_intr_noop(struct cphy *phy)
  83 {
  84         return 0;
  85 }
  86
  87 static int ael100x_get_link_status(struct cphy *phy, int *link_ok,
  88                                    int *speed, int *duplex, int *fc)
  89 {
  90         if (link_ok) {
  91                 unsigned int status;
  92                 int err = mdio_read(phy, MDIO_DEV_PMA_PMD, MII_BMSR, &status);
  93
  94                 /*
  95                  * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
  96                  * once more to get the current link state.
  97                  */
  98                 if (!err && !(status & BMSR_LSTATUS))
  99                         err = mdio_read(phy, MDIO_DEV_PMA_PMD, MII_BMSR,
 100                                         &status);
 101                 if (err)
 102                         return err;
 103                 *link_ok = !!(status & BMSR_LSTATUS);
 104         }
 105         if (speed)
 106                 *speed = SPEED_10000;
 107         if (duplex)
 108                 *duplex = DUPLEX_FULL;
 109         return 0;
 110 }
 111
 112 static struct cphy_ops ael1002_ops = {
 113         .reset = ael1002_reset,
 114         .intr_enable = ael1002_intr_noop,
 115         .intr_disable = ael1002_intr_noop,
 116         .intr_clear = ael1002_intr_noop,
 117         .intr_handler = ael1002_intr_noop,
 118         .get_link_status = ael100x_get_link_status,
 119         .power_down = ael1002_power_down,
 120 };
 121
 122 void t3_ael1002_phy_prep(struct cphy *phy, struct adapter *adapter,
 123                          int phy_addr, const struct mdio_ops *mdio_ops)
 124 {
 125         cphy_init(phy, adapter, phy_addr, &ael1002_ops, mdio_ops);
 126         ael100x_txon(phy);
 127 }
 128
 129 static int ael1006_reset(struct cphy *phy, int wait)
 130 {
 131         return t3_phy_reset(phy, MDIO_DEV_PMA_PMD, wait);
 132 }
 133
 134 static int ael1006_intr_enable(struct cphy *phy)
 135 {
 136         return mdio_write(phy, MDIO_DEV_PMA_PMD, LASI_CTRL, 1);
 137 }
 138
 139 static int ael1006_intr_disable(struct cphy *phy)
 140 {
 141         return mdio_write(phy, MDIO_DEV_PMA_PMD, LASI_CTRL, 0);
 142 }
 143
 144 static int ael1006_intr_clear(struct cphy *phy)
 145 {
 146         u32 val;
 147
 148         return mdio_read(phy, MDIO_DEV_PMA_PMD, LASI_STAT, &val);
 149 }
 150
 151 static int ael1006_intr_handler(struct cphy *phy)
 152 {
 153         unsigned int status;
 154         int err = mdio_read(phy, MDIO_DEV_PMA_PMD, LASI_STAT, &status);
 155
 156         if (err)
 157                 return err;
 158         return (status & 1) ? cphy_cause_link_change : 0;
 159 }
 160
 161 static int ael1006_power_down(struct cphy *phy, int enable)
 162 {
 163         return t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR,
 164                                    BMCR_PDOWN, enable ? BMCR_PDOWN : 0);
 165 }
 166
 167 static struct cphy_ops ael1006_ops = {
 168         .reset = ael1006_reset,
 169         .intr_enable = ael1006_intr_enable,
 170         .intr_disable = ael1006_intr_disable,
 171         .intr_clear = ael1006_intr_clear,
 172         .intr_handler = ael1006_intr_handler,
 173         .get_link_status = ael100x_get_link_status,
 174         .power_down = ael1006_power_down,
 175 };
 176
 177 void t3_ael1006_phy_prep(struct cphy *phy, struct adapter *adapter,
 178                          int phy_addr, const struct mdio_ops *mdio_ops)
 179 {
 180         cphy_init(phy, adapter, phy_addr, &ael1006_ops, mdio_ops);
 181         ael100x_txon(phy);
 182 }
 183
 184 static struct cphy_ops qt2045_ops = {
 185         .reset = ael1006_reset,
 186         .intr_enable = ael1006_intr_enable,
 187         .intr_disable = ael1006_intr_disable,
 188         .intr_clear = ael1006_intr_clear,
 189         .intr_handler = ael1006_intr_handler,
 190         .get_link_status = ael100x_get_link_status,
 191         .power_down = ael1006_power_down,
 192 };
 193
 194 void t3_qt2045_phy_prep(struct cphy *phy, struct adapter *adapter,
 195                         int phy_addr, const struct mdio_ops *mdio_ops)
 196 {
 197         unsigned int stat;
 198
 199         cphy_init(phy, adapter, phy_addr, &qt2045_ops, mdio_ops);
 200
 201         /*
 202          * Some cards where the PHY is supposed to be at address 0 actually
 203          * have it at 1.
 204          */
 205         if (!phy_addr && !mdio_read(phy, MDIO_DEV_PMA_PMD, MII_BMSR, &stat) &&
 206             stat == 0xffff)
 207                 phy->addr = 1;
 208 }
 209
 210 static int xaui_direct_reset(struct cphy *phy, int wait)
 211 {
 212         return 0;
 213 }
 214
 215 static int xaui_direct_get_link_status(struct cphy *phy, int *link_ok,
 216                                        int *speed, int *duplex, int *fc)
 217 {
 218         if (link_ok) {
 219                 unsigned int status;
 220
 221                 status = t3_read_reg(phy->adapter,
 222                                      XGM_REG(A_XGM_SERDES_STAT0, phy->addr));
 223                 *link_ok = !(status & F_LOWSIG0);
 224         }
 225         if (speed)
 226                 *speed = SPEED_10000;
 227         if (duplex)
 228                 *duplex = DUPLEX_FULL;
 229         return 0;
 230 }
 231
 232 static int xaui_direct_power_down(struct cphy *phy, int enable)
 233 {
 234         return 0;
 235 }
 236
 237 static struct cphy_ops xaui_direct_ops = {
 238         .reset = xaui_direct_reset,
 239         .intr_enable = ael1002_intr_noop,
 240         .intr_disable = ael1002_intr_noop,
 241         .intr_clear = ael1002_intr_noop,
 242         .intr_handler = ael1002_intr_noop,
 243         .get_link_status = xaui_direct_get_link_status,
 244         .power_down = xaui_direct_power_down,
 245 };
 246
 247 void t3_xaui_direct_phy_prep(struct cphy *phy, struct adapter *adapter,
 248                              int phy_addr, const struct mdio_ops *mdio_ops)
 249 {
 250         cphy_init(phy, adapter, 1, &xaui_direct_ops, mdio_ops);
 251 }