Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1 | /**************************************************************************** |
Ben Hutchings | f7a6d2c | 2013-08-29 23:32:48 +0100 | [diff] [blame] | 2 | * Driver for Solarflare network controllers and boards |
Ben Hutchings | 0a6f40c | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 3 | * Copyright 2006-2011 Solarflare Communications Inc. |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 as published |
| 7 | * by the Free Software Foundation, incorporated herein by reference. |
| 8 | */ |
| 9 | /* |
| 10 | * Useful functions for working with MDIO clause 45 PHYs |
| 11 | */ |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/ethtool.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include "net_driver.h" |
| 16 | #include "mdio_10g.h" |
Steve Hodgson | 8b9dc8d | 2009-01-29 17:49:09 +0000 | [diff] [blame] | 17 | #include "workarounds.h" |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 18 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 19 | unsigned efx_mdio_id_oui(u32 id) |
Ben Hutchings | 3f39a5e | 2009-02-27 13:07:15 +0000 | [diff] [blame] | 20 | { |
| 21 | unsigned oui = 0; |
| 22 | int i; |
| 23 | |
| 24 | /* The bits of the OUI are designated a..x, with a=0 and b variable. |
| 25 | * In the id register c is the MSB but the OUI is conventionally |
| 26 | * written as bytes h..a, p..i, x..q. Reorder the bits accordingly. */ |
| 27 | for (i = 0; i < 22; ++i) |
| 28 | if (id & (1 << (i + 10))) |
| 29 | oui |= 1 << (i ^ 7); |
| 30 | |
| 31 | return oui; |
| 32 | } |
| 33 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 34 | int efx_mdio_reset_mmd(struct efx_nic *port, int mmd, |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 35 | int spins, int spintime) |
| 36 | { |
| 37 | u32 ctrl; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 38 | |
| 39 | /* Catch callers passing values in the wrong units (or just silly) */ |
| 40 | EFX_BUG_ON_PARANOID(spins * spintime >= 5000); |
| 41 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 42 | efx_mdio_write(port, mmd, MDIO_CTRL1, MDIO_CTRL1_RESET); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 43 | /* Wait for the reset bit to clear. */ |
| 44 | do { |
| 45 | msleep(spintime); |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 46 | ctrl = efx_mdio_read(port, mmd, MDIO_CTRL1); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 47 | spins--; |
| 48 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 49 | } while (spins && (ctrl & MDIO_CTRL1_RESET)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 50 | |
| 51 | return spins ? spins : -ETIMEDOUT; |
| 52 | } |
| 53 | |
Ben Hutchings | a461103 | 2011-02-24 23:59:15 +0000 | [diff] [blame] | 54 | static int efx_mdio_check_mmd(struct efx_nic *efx, int mmd) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 55 | { |
| 56 | int status; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 57 | |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 58 | if (mmd != MDIO_MMD_AN) { |
| 59 | /* Read MMD STATUS2 to check it is responding. */ |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 60 | status = efx_mdio_read(efx, mmd, MDIO_STAT2); |
| 61 | if ((status & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 62 | netif_err(efx, hw, efx->net_dev, |
| 63 | "PHY MMD %d not responding.\n", mmd); |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 64 | return -EIO; |
| 65 | } |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 66 | } |
| 67 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | /* This ought to be ridiculous overkill. We expect it to fail rarely */ |
| 72 | #define MDIO45_RESET_TIME 1000 /* ms */ |
| 73 | #define MDIO45_RESET_ITERS 100 |
| 74 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 75 | int efx_mdio_wait_reset_mmds(struct efx_nic *efx, unsigned int mmd_mask) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 76 | { |
| 77 | const int spintime = MDIO45_RESET_TIME / MDIO45_RESET_ITERS; |
| 78 | int tries = MDIO45_RESET_ITERS; |
| 79 | int rc = 0; |
| 80 | int in_reset; |
| 81 | |
| 82 | while (tries) { |
| 83 | int mask = mmd_mask; |
| 84 | int mmd = 0; |
| 85 | int stat; |
| 86 | in_reset = 0; |
| 87 | while (mask) { |
| 88 | if (mask & 1) { |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 89 | stat = efx_mdio_read(efx, mmd, MDIO_CTRL1); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 90 | if (stat < 0) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 91 | netif_err(efx, hw, efx->net_dev, |
| 92 | "failed to read status of" |
| 93 | " MMD %d\n", mmd); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 94 | return -EIO; |
| 95 | } |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 96 | if (stat & MDIO_CTRL1_RESET) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 97 | in_reset |= (1 << mmd); |
| 98 | } |
| 99 | mask = mask >> 1; |
| 100 | mmd++; |
| 101 | } |
| 102 | if (!in_reset) |
| 103 | break; |
| 104 | tries--; |
| 105 | msleep(spintime); |
| 106 | } |
| 107 | if (in_reset != 0) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 108 | netif_err(efx, hw, efx->net_dev, |
| 109 | "not all MMDs came out of reset in time." |
| 110 | " MMDs still in reset: %x\n", in_reset); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 111 | rc = -ETIMEDOUT; |
| 112 | } |
| 113 | return rc; |
| 114 | } |
| 115 | |
Ben Hutchings | a461103 | 2011-02-24 23:59:15 +0000 | [diff] [blame] | 116 | int efx_mdio_check_mmds(struct efx_nic *efx, unsigned int mmd_mask) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 117 | { |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 118 | int mmd = 0, probe_mmd, devs1, devs2; |
Ben Hutchings | 27dd2ca | 2008-12-12 21:44:14 -0800 | [diff] [blame] | 119 | u32 devices; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 120 | |
| 121 | /* Historically we have probed the PHYXS to find out what devices are |
| 122 | * present,but that doesn't work so well if the PHYXS isn't expected |
| 123 | * to exist, if so just find the first item in the list supplied. */ |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 124 | probe_mmd = (mmd_mask & MDIO_DEVS_PHYXS) ? MDIO_MMD_PHYXS : |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 125 | __ffs(mmd_mask); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 126 | |
| 127 | /* Check all the expected MMDs are present */ |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 128 | devs1 = efx_mdio_read(efx, probe_mmd, MDIO_DEVS1); |
| 129 | devs2 = efx_mdio_read(efx, probe_mmd, MDIO_DEVS2); |
| 130 | if (devs1 < 0 || devs2 < 0) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 131 | netif_err(efx, hw, efx->net_dev, |
| 132 | "failed to read devices present\n"); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 133 | return -EIO; |
| 134 | } |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 135 | devices = devs1 | (devs2 << 16); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 136 | if ((devices & mmd_mask) != mmd_mask) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 137 | netif_err(efx, hw, efx->net_dev, |
| 138 | "required MMDs not present: got %x, wanted %x\n", |
| 139 | devices, mmd_mask); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 140 | return -ENODEV; |
| 141 | } |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 142 | netif_vdbg(efx, hw, efx->net_dev, "Devices present: %x\n", devices); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 143 | |
| 144 | /* Check all required MMDs are responding and happy. */ |
| 145 | while (mmd_mask) { |
Ben Hutchings | a461103 | 2011-02-24 23:59:15 +0000 | [diff] [blame] | 146 | if ((mmd_mask & 1) && efx_mdio_check_mmd(efx, mmd)) |
| 147 | return -EIO; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 148 | mmd_mask = mmd_mask >> 1; |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 149 | mmd++; |
| 150 | } |
| 151 | |
| 152 | return 0; |
| 153 | } |
| 154 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 155 | bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 156 | { |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 157 | /* If the port is in loopback, then we should only consider a subset |
| 158 | * of mmd's */ |
| 159 | if (LOOPBACK_INTERNAL(efx)) |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 160 | return true; |
Ben Hutchings | e58f69f | 2009-11-29 15:08:41 +0000 | [diff] [blame] | 161 | else if (LOOPBACK_MASK(efx) & LOOPBACKS_WS) |
Ben Hutchings | dc8cfa5 | 2008-09-01 12:46:50 +0100 | [diff] [blame] | 162 | return false; |
Ben Hutchings | f8b87c1 | 2008-09-01 12:48:17 +0100 | [diff] [blame] | 163 | else if (efx_phy_mode_disabled(efx->phy_mode)) |
| 164 | return false; |
Steve Hodgson | 6779776 | 2009-01-29 17:51:15 +0000 | [diff] [blame] | 165 | else if (efx->loopback_mode == LOOPBACK_PHYXS) |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 166 | mmd_mask &= ~(MDIO_DEVS_PHYXS | |
| 167 | MDIO_DEVS_PCS | |
| 168 | MDIO_DEVS_PMAPMD | |
| 169 | MDIO_DEVS_AN); |
Steve Hodgson | 6779776 | 2009-01-29 17:51:15 +0000 | [diff] [blame] | 170 | else if (efx->loopback_mode == LOOPBACK_PCS) |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 171 | mmd_mask &= ~(MDIO_DEVS_PCS | |
| 172 | MDIO_DEVS_PMAPMD | |
| 173 | MDIO_DEVS_AN); |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 174 | else if (efx->loopback_mode == LOOPBACK_PMAPMD) |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 175 | mmd_mask &= ~(MDIO_DEVS_PMAPMD | |
| 176 | MDIO_DEVS_AN); |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 177 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 178 | return mdio45_links_ok(&efx->mdio, mmd_mask); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 179 | } |
| 180 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 181 | void efx_mdio_transmit_disable(struct efx_nic *efx) |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 182 | { |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 183 | efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD, |
| 184 | MDIO_PMA_TXDIS, MDIO_PMD_TXDIS_GLOBAL, |
| 185 | efx->phy_mode & PHY_MODE_TX_DISABLED); |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 186 | } |
| 187 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 188 | void efx_mdio_phy_reconfigure(struct efx_nic *efx) |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 189 | { |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 190 | efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD, |
| 191 | MDIO_CTRL1, MDIO_PMA_CTRL1_LOOPBACK, |
| 192 | efx->loopback_mode == LOOPBACK_PMAPMD); |
| 193 | efx_mdio_set_flag(efx, MDIO_MMD_PCS, |
| 194 | MDIO_CTRL1, MDIO_PCS_CTRL1_LOOPBACK, |
| 195 | efx->loopback_mode == LOOPBACK_PCS); |
| 196 | efx_mdio_set_flag(efx, MDIO_MMD_PHYXS, |
| 197 | MDIO_CTRL1, MDIO_PHYXS_CTRL1_LOOPBACK, |
Ben Hutchings | e58f69f | 2009-11-29 15:08:41 +0000 | [diff] [blame] | 198 | efx->loopback_mode == LOOPBACK_PHYXS_WS); |
Ben Hutchings | 3273c2e | 2008-05-07 13:36:19 +0100 | [diff] [blame] | 199 | } |
| 200 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 201 | static void efx_mdio_set_mmd_lpower(struct efx_nic *efx, |
| 202 | int lpower, int mmd) |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 203 | { |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 204 | int stat = efx_mdio_read(efx, mmd, MDIO_STAT1); |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 205 | |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 206 | netif_vdbg(efx, drv, efx->net_dev, "Setting low power mode for MMD %d to %d\n", |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 207 | mmd, lpower); |
| 208 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 209 | if (stat & MDIO_STAT1_LPOWERABLE) { |
| 210 | efx_mdio_set_flag(efx, mmd, MDIO_CTRL1, |
| 211 | MDIO_CTRL1_LPOWER, lpower); |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 212 | } |
| 213 | } |
| 214 | |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 215 | void efx_mdio_set_mmds_lpower(struct efx_nic *efx, |
| 216 | int low_power, unsigned int mmd_mask) |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 217 | { |
| 218 | int mmd = 0; |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 219 | mmd_mask &= ~MDIO_DEVS_AN; |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 220 | while (mmd_mask) { |
| 221 | if (mmd_mask & 1) |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 222 | efx_mdio_set_mmd_lpower(efx, low_power, mmd); |
Ben Hutchings | 3e133c4 | 2008-11-04 20:34:56 +0000 | [diff] [blame] | 223 | mmd_mask = (mmd_mask >> 1); |
| 224 | mmd++; |
| 225 | } |
| 226 | } |
| 227 | |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 228 | /** |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 229 | * efx_mdio_set_settings - Set (some of) the PHY settings over MDIO. |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 230 | * @efx: Efx NIC |
Ben Hutchings | 9c636ba | 2012-01-05 17:19:45 +0000 | [diff] [blame] | 231 | * @ecmd: New settings |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 232 | */ |
Ben Hutchings | 68e7f45 | 2009-04-29 08:05:08 +0000 | [diff] [blame] | 233 | int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 234 | { |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 235 | struct ethtool_cmd prev = { .cmd = ETHTOOL_GSET }; |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 236 | |
| 237 | efx->phy_op->get_settings(efx, &prev); |
| 238 | |
| 239 | if (ecmd->advertising == prev.advertising && |
David Decotigny | 8ae6dac | 2011-04-27 18:32:38 +0000 | [diff] [blame] | 240 | ethtool_cmd_speed(ecmd) == ethtool_cmd_speed(&prev) && |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 241 | ecmd->duplex == prev.duplex && |
| 242 | ecmd->port == prev.port && |
| 243 | ecmd->autoneg == prev.autoneg) |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 244 | return 0; |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 245 | |
| 246 | /* We can only change these settings for -T PHYs */ |
| 247 | if (prev.port != PORT_TP || ecmd->port != PORT_TP) |
| 248 | return -EINVAL; |
| 249 | |
Ben Hutchings | af4ad9b | 2009-01-29 17:59:37 +0000 | [diff] [blame] | 250 | /* Check that PHY supports these settings */ |
Ben Hutchings | fc2b5e6 | 2009-10-23 08:33:27 +0000 | [diff] [blame] | 251 | if (!ecmd->autoneg || |
| 252 | (ecmd->advertising | SUPPORTED_Autoneg) & ~prev.supported) |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 253 | return -EINVAL; |
| 254 | |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 255 | efx_link_set_advertising(efx, ecmd->advertising | ADVERTISED_Autoneg); |
| 256 | efx_mdio_an_reconfigure(efx); |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * efx_mdio_an_reconfigure - Push advertising flags and restart autonegotiation |
| 262 | * @efx: Efx NIC |
| 263 | */ |
| 264 | void efx_mdio_an_reconfigure(struct efx_nic *efx) |
| 265 | { |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 266 | int reg; |
| 267 | |
| 268 | WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN)); |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 269 | |
Ben Hutchings | fc2b5e6 | 2009-10-23 08:33:27 +0000 | [diff] [blame] | 270 | /* Set up the base page */ |
Ben Hutchings | 8fbca79 | 2010-09-22 10:00:11 +0000 | [diff] [blame] | 271 | reg = ADVERTISE_CSMA | ADVERTISE_RESV; |
Ben Hutchings | d3245b2 | 2009-11-29 03:42:41 +0000 | [diff] [blame] | 272 | if (efx->link_advertising & ADVERTISED_Pause) |
| 273 | reg |= ADVERTISE_PAUSE_CAP; |
| 274 | if (efx->link_advertising & ADVERTISED_Asym_Pause) |
| 275 | reg |= ADVERTISE_PAUSE_ASYM; |
Ben Hutchings | fc2b5e6 | 2009-10-23 08:33:27 +0000 | [diff] [blame] | 276 | efx_mdio_write(efx, MDIO_MMD_AN, MDIO_AN_ADVERTISE, reg); |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 277 | |
Ben Hutchings | 8fbca79 | 2010-09-22 10:00:11 +0000 | [diff] [blame] | 278 | /* Set up the (extended) next page */ |
| 279 | efx->phy_op->set_npage_adv(efx, efx->link_advertising); |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 280 | |
Ben Hutchings | fc2b5e6 | 2009-10-23 08:33:27 +0000 | [diff] [blame] | 281 | /* Enable and restart AN */ |
| 282 | reg = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_CTRL1); |
Ben Hutchings | 8fbca79 | 2010-09-22 10:00:11 +0000 | [diff] [blame] | 283 | reg |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART | MDIO_AN_CTRL1_XNP; |
Ben Hutchings | fc2b5e6 | 2009-10-23 08:33:27 +0000 | [diff] [blame] | 284 | efx_mdio_write(efx, MDIO_MMD_AN, MDIO_CTRL1, reg); |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 285 | } |
| 286 | |
David S. Miller | b5626946 | 2011-05-17 17:53:22 -0400 | [diff] [blame] | 287 | u8 efx_mdio_get_pause(struct efx_nic *efx) |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 288 | { |
Ben Hutchings | 18ea024 | 2009-10-23 08:33:17 +0000 | [diff] [blame] | 289 | BUILD_BUG_ON(EFX_FC_AUTO & (EFX_FC_RX | EFX_FC_TX)); |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 290 | |
Ben Hutchings | 18ea024 | 2009-10-23 08:33:17 +0000 | [diff] [blame] | 291 | if (!(efx->wanted_fc & EFX_FC_AUTO)) |
Ben Hutchings | 04cc8ca | 2008-12-12 21:50:46 -0800 | [diff] [blame] | 292 | return efx->wanted_fc; |
Ben Hutchings | 18ea024 | 2009-10-23 08:33:17 +0000 | [diff] [blame] | 293 | |
| 294 | WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN)); |
| 295 | |
| 296 | return mii_resolve_flowctrl_fdx( |
| 297 | mii_advertise_flowctrl(efx->wanted_fc), |
| 298 | efx_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_LPA)); |
Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 299 | } |
Ben Hutchings | 4f16c07 | 2010-02-03 09:30:50 +0000 | [diff] [blame] | 300 | |
| 301 | int efx_mdio_test_alive(struct efx_nic *efx) |
| 302 | { |
| 303 | int rc; |
| 304 | int devad = __ffs(efx->mdio.mmds); |
| 305 | u16 physid1, physid2; |
| 306 | |
| 307 | mutex_lock(&efx->mac_lock); |
| 308 | |
| 309 | physid1 = efx_mdio_read(efx, devad, MDIO_DEVID1); |
| 310 | physid2 = efx_mdio_read(efx, devad, MDIO_DEVID2); |
| 311 | |
| 312 | if ((physid1 == 0x0000) || (physid1 == 0xffff) || |
| 313 | (physid2 == 0x0000) || (physid2 == 0xffff)) { |
Ben Hutchings | 62776d0 | 2010-06-23 11:30:07 +0000 | [diff] [blame] | 314 | netif_err(efx, hw, efx->net_dev, |
| 315 | "no MDIO PHY present with ID %d\n", efx->mdio.prtad); |
Ben Hutchings | 4f16c07 | 2010-02-03 09:30:50 +0000 | [diff] [blame] | 316 | rc = -EINVAL; |
| 317 | } else { |
Ben Hutchings | a461103 | 2011-02-24 23:59:15 +0000 | [diff] [blame] | 318 | rc = efx_mdio_check_mmds(efx, efx->mdio.mmds); |
Ben Hutchings | 4f16c07 | 2010-02-03 09:30:50 +0000 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | mutex_unlock(&efx->mac_lock); |
| 322 | return rc; |
| 323 | } |