Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1 | /* Framework for finding and configuring PHYs. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 2 | * Also contains generic PHY driver |
| 3 | * |
| 4 | * Author: Andy Fleming |
| 5 | * |
| 6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | */ |
Joe Perches | 8d24248 | 2012-06-09 07:49:07 +0000 | [diff] [blame] | 14 | |
| 15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 16 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 17 | #include <linux/kernel.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 18 | #include <linux/string.h> |
| 19 | #include <linux/errno.h> |
| 20 | #include <linux/unistd.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/netdevice.h> |
| 26 | #include <linux/etherdevice.h> |
| 27 | #include <linux/skbuff.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 28 | #include <linux/mm.h> |
| 29 | #include <linux/module.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 30 | #include <linux/mii.h> |
| 31 | #include <linux/ethtool.h> |
| 32 | #include <linux/phy.h> |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 33 | #include <linux/mdio.h> |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 34 | #include <linux/io.h> |
| 35 | #include <linux/uaccess.h> |
Sascha Hauer | de906af | 2014-05-21 15:29:45 +0200 | [diff] [blame] | 36 | #include <linux/of.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 37 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 38 | #include <asm/irq.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 39 | |
Olaf Hering | afcceaa | 2005-12-14 00:33:49 +0100 | [diff] [blame] | 40 | MODULE_DESCRIPTION("PHY library"); |
| 41 | MODULE_AUTHOR("Andy Fleming"); |
| 42 | MODULE_LICENSE("GPL"); |
| 43 | |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 44 | void phy_device_free(struct phy_device *phydev) |
| 45 | { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 46 | put_device(&phydev->mdio.dev); |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 47 | } |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 48 | EXPORT_SYMBOL(phy_device_free); |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 49 | |
Andrew Lunn | 711fdba | 2016-01-06 20:11:27 +0100 | [diff] [blame] | 50 | static void phy_mdio_device_free(struct mdio_device *mdiodev) |
| 51 | { |
| 52 | struct phy_device *phydev; |
| 53 | |
| 54 | phydev = container_of(mdiodev, struct phy_device, mdio); |
| 55 | phy_device_free(phydev); |
| 56 | } |
| 57 | |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 58 | static void phy_device_release(struct device *dev) |
| 59 | { |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 60 | kfree(to_phy_device(dev)); |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 61 | } |
| 62 | |
Andrew Lunn | 711fdba | 2016-01-06 20:11:27 +0100 | [diff] [blame] | 63 | static void phy_mdio_device_remove(struct mdio_device *mdiodev) |
| 64 | { |
| 65 | struct phy_device *phydev; |
| 66 | |
| 67 | phydev = container_of(mdiodev, struct phy_device, mdio); |
| 68 | phy_device_remove(phydev); |
| 69 | } |
| 70 | |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 71 | enum genphy_driver { |
| 72 | GENPHY_DRV_1G, |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 73 | GENPHY_DRV_10G, |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 74 | GENPHY_DRV_MAX |
| 75 | }; |
| 76 | |
| 77 | static struct phy_driver genphy_driver[GENPHY_DRV_MAX]; |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 78 | |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 79 | static LIST_HEAD(phy_fixup_list); |
| 80 | static DEFINE_MUTEX(phy_fixup_lock); |
| 81 | |
Andrew Lunn | bc87922 | 2016-01-06 20:11:21 +0100 | [diff] [blame] | 82 | #ifdef CONFIG_PM |
| 83 | static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) |
| 84 | { |
| 85 | struct device_driver *drv = phydev->mdio.dev.driver; |
| 86 | struct phy_driver *phydrv = to_phy_driver(drv); |
| 87 | struct net_device *netdev = phydev->attached_dev; |
| 88 | |
| 89 | if (!drv || !phydrv->suspend) |
| 90 | return false; |
| 91 | |
| 92 | /* PHY not attached? May suspend if the PHY has not already been |
| 93 | * suspended as part of a prior call to phy_disconnect() -> |
| 94 | * phy_detach() -> phy_suspend() because the parent netdev might be the |
| 95 | * MDIO bus driver and clock gated at this point. |
| 96 | */ |
| 97 | if (!netdev) |
| 98 | return !phydev->suspended; |
| 99 | |
| 100 | /* Don't suspend PHY if the attached netdev parent may wakeup. |
| 101 | * The parent may point to a PCI device, as in tg3 driver. |
| 102 | */ |
| 103 | if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) |
| 104 | return false; |
| 105 | |
| 106 | /* Also don't suspend PHY if the netdev itself may wakeup. This |
| 107 | * is the case for devices w/o underlaying pwr. mgmt. aware bus, |
| 108 | * e.g. SoC devices. |
| 109 | */ |
| 110 | if (device_may_wakeup(&netdev->dev)) |
| 111 | return false; |
| 112 | |
| 113 | return true; |
| 114 | } |
| 115 | |
| 116 | static int mdio_bus_phy_suspend(struct device *dev) |
| 117 | { |
| 118 | struct phy_device *phydev = to_phy_device(dev); |
| 119 | |
| 120 | /* We must stop the state machine manually, otherwise it stops out of |
| 121 | * control, possibly with the phydev->lock held. Upon resume, netdev |
| 122 | * may call phy routines that try to grab the same lock, and that may |
| 123 | * lead to a deadlock. |
| 124 | */ |
| 125 | if (phydev->attached_dev && phydev->adjust_link) |
| 126 | phy_stop_machine(phydev); |
| 127 | |
| 128 | if (!mdio_bus_phy_may_suspend(phydev)) |
| 129 | return 0; |
| 130 | |
| 131 | return phy_suspend(phydev); |
| 132 | } |
| 133 | |
| 134 | static int mdio_bus_phy_resume(struct device *dev) |
| 135 | { |
| 136 | struct phy_device *phydev = to_phy_device(dev); |
| 137 | int ret; |
| 138 | |
| 139 | if (!mdio_bus_phy_may_suspend(phydev)) |
| 140 | goto no_resume; |
| 141 | |
| 142 | ret = phy_resume(phydev); |
| 143 | if (ret < 0) |
| 144 | return ret; |
| 145 | |
| 146 | no_resume: |
| 147 | if (phydev->attached_dev && phydev->adjust_link) |
| 148 | phy_start_machine(phydev); |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static int mdio_bus_phy_restore(struct device *dev) |
| 154 | { |
| 155 | struct phy_device *phydev = to_phy_device(dev); |
| 156 | struct net_device *netdev = phydev->attached_dev; |
| 157 | int ret; |
| 158 | |
| 159 | if (!netdev) |
| 160 | return 0; |
| 161 | |
| 162 | ret = phy_init_hw(phydev); |
| 163 | if (ret < 0) |
| 164 | return ret; |
| 165 | |
Kunihiko Hayashi | 99519a6 | 2018-12-18 16:57:04 +0900 | [diff] [blame] | 166 | if (phydev->attached_dev && phydev->adjust_link) |
| 167 | phy_start_machine(phydev); |
Andrew Lunn | bc87922 | 2016-01-06 20:11:21 +0100 | [diff] [blame] | 168 | |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static const struct dev_pm_ops mdio_bus_phy_pm_ops = { |
| 173 | .suspend = mdio_bus_phy_suspend, |
| 174 | .resume = mdio_bus_phy_resume, |
| 175 | .freeze = mdio_bus_phy_suspend, |
| 176 | .thaw = mdio_bus_phy_resume, |
| 177 | .restore = mdio_bus_phy_restore, |
| 178 | }; |
| 179 | |
| 180 | #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) |
| 181 | |
| 182 | #else |
| 183 | |
| 184 | #define MDIO_BUS_PHY_PM_OPS NULL |
| 185 | |
| 186 | #endif /* CONFIG_PM */ |
| 187 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 188 | /** |
| 189 | * phy_register_fixup - creates a new phy_fixup and adds it to the list |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 190 | * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 191 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 192 | * It can also be PHY_ANY_UID |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 193 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 194 | * comparison |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 195 | * @run: The actual code to be run when a matching PHY is found |
| 196 | */ |
| 197 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 198 | int (*run)(struct phy_device *)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 199 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 200 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 201 | |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 202 | if (!fixup) |
| 203 | return -ENOMEM; |
| 204 | |
Kay Sievers | fb28ad3 | 2008-11-10 13:55:14 -0800 | [diff] [blame] | 205 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 206 | fixup->phy_uid = phy_uid; |
| 207 | fixup->phy_uid_mask = phy_uid_mask; |
| 208 | fixup->run = run; |
| 209 | |
| 210 | mutex_lock(&phy_fixup_lock); |
| 211 | list_add_tail(&fixup->list, &phy_fixup_list); |
| 212 | mutex_unlock(&phy_fixup_lock); |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | EXPORT_SYMBOL(phy_register_fixup); |
| 217 | |
| 218 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ |
| 219 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 220 | int (*run)(struct phy_device *)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 221 | { |
| 222 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); |
| 223 | } |
| 224 | EXPORT_SYMBOL(phy_register_fixup_for_uid); |
| 225 | |
| 226 | /* Registers a fixup to be run on the PHY with id string bus_id */ |
| 227 | int phy_register_fixup_for_id(const char *bus_id, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 228 | int (*run)(struct phy_device *)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 229 | { |
| 230 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); |
| 231 | } |
| 232 | EXPORT_SYMBOL(phy_register_fixup_for_id); |
| 233 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 234 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 235 | * Fixups can be set to match any in one or more fields. |
| 236 | */ |
| 237 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) |
| 238 | { |
Andrew Lunn | 84eff6d | 2016-01-06 20:11:10 +0100 | [diff] [blame] | 239 | if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 240 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
| 241 | return 0; |
| 242 | |
| 243 | if ((fixup->phy_uid & fixup->phy_uid_mask) != |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 244 | (phydev->phy_id & fixup->phy_uid_mask)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 245 | if (fixup->phy_uid != PHY_ANY_UID) |
| 246 | return 0; |
| 247 | |
| 248 | return 1; |
| 249 | } |
| 250 | |
| 251 | /* Runs any matching fixups for this phydev */ |
Sergei Shtylyov | fbfcec6 | 2014-01-05 03:28:27 +0300 | [diff] [blame] | 252 | static int phy_scan_fixups(struct phy_device *phydev) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 253 | { |
| 254 | struct phy_fixup *fixup; |
| 255 | |
| 256 | mutex_lock(&phy_fixup_lock); |
| 257 | list_for_each_entry(fixup, &phy_fixup_list, list) { |
| 258 | if (phy_needs_fixup(phydev, fixup)) { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 259 | int err = fixup->run(phydev); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 260 | |
Jiri Slaby | bc23283 | 2009-07-13 11:23:39 +0000 | [diff] [blame] | 261 | if (err < 0) { |
| 262 | mutex_unlock(&phy_fixup_lock); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 263 | return err; |
Jiri Slaby | bc23283 | 2009-07-13 11:23:39 +0000 | [diff] [blame] | 264 | } |
Florian Fainelli | b0ae009 | 2014-02-11 17:27:41 -0800 | [diff] [blame] | 265 | phydev->has_fixups = true; |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 266 | } |
| 267 | } |
| 268 | mutex_unlock(&phy_fixup_lock); |
| 269 | |
| 270 | return 0; |
| 271 | } |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 272 | |
Andrew Lunn | e76a495 | 2016-01-06 20:11:23 +0100 | [diff] [blame] | 273 | static int phy_bus_match(struct device *dev, struct device_driver *drv) |
| 274 | { |
| 275 | struct phy_device *phydev = to_phy_device(dev); |
| 276 | struct phy_driver *phydrv = to_phy_driver(drv); |
| 277 | const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); |
| 278 | int i; |
| 279 | |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 280 | if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) |
| 281 | return 0; |
| 282 | |
Andrew Lunn | e76a495 | 2016-01-06 20:11:23 +0100 | [diff] [blame] | 283 | if (phydrv->match_phy_device) |
| 284 | return phydrv->match_phy_device(phydev); |
| 285 | |
| 286 | if (phydev->is_c45) { |
| 287 | for (i = 1; i < num_ids; i++) { |
| 288 | if (!(phydev->c45_ids.devices_in_package & (1 << i))) |
| 289 | continue; |
| 290 | |
| 291 | if ((phydrv->phy_id & phydrv->phy_id_mask) == |
| 292 | (phydev->c45_ids.device_ids[i] & |
| 293 | phydrv->phy_id_mask)) |
| 294 | return 1; |
| 295 | } |
| 296 | return 0; |
| 297 | } else { |
| 298 | return (phydrv->phy_id & phydrv->phy_id_mask) == |
| 299 | (phydev->phy_id & phydrv->phy_id_mask); |
| 300 | } |
| 301 | } |
| 302 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 303 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 304 | bool is_c45, |
| 305 | struct phy_c45_device_ids *c45_ids) |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 306 | { |
| 307 | struct phy_device *dev; |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 308 | struct mdio_device *mdiodev; |
David Woodhouse | 8626d3b | 2010-04-02 01:05:27 +0000 | [diff] [blame] | 309 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 310 | /* We allocate the device, and initialize the default values */ |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 311 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
Sergei Shtylyov | ef899c0 | 2015-08-28 21:35:14 +0300 | [diff] [blame] | 312 | if (!dev) |
Sergei Shtylyov | d3765f0 | 2015-08-28 21:34:34 +0300 | [diff] [blame] | 313 | return ERR_PTR(-ENOMEM); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 314 | |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 315 | mdiodev = &dev->mdio; |
| 316 | mdiodev->dev.release = phy_device_release; |
| 317 | mdiodev->dev.parent = &bus->dev; |
| 318 | mdiodev->dev.bus = &mdio_bus_type; |
| 319 | mdiodev->bus = bus; |
Andrew Lunn | bc87922 | 2016-01-06 20:11:21 +0100 | [diff] [blame] | 320 | mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS; |
Andrew Lunn | e76a495 | 2016-01-06 20:11:23 +0100 | [diff] [blame] | 321 | mdiodev->bus_match = phy_bus_match; |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 322 | mdiodev->addr = addr; |
Andrew Lunn | 7f85442 | 2016-01-06 20:11:18 +0100 | [diff] [blame] | 323 | mdiodev->flags = MDIO_DEVICE_FLAG_PHY; |
Andrew Lunn | 711fdba | 2016-01-06 20:11:27 +0100 | [diff] [blame] | 324 | mdiodev->device_free = phy_mdio_device_free; |
| 325 | mdiodev->device_remove = phy_mdio_device_remove; |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 326 | |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 327 | dev->speed = 0; |
| 328 | dev->duplex = -1; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 329 | dev->pause = 0; |
| 330 | dev->asym_pause = 0; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 331 | dev->link = 1; |
Andy Fleming | e8a2b6a | 2006-12-01 12:01:06 -0600 | [diff] [blame] | 332 | dev->interface = PHY_INTERFACE_MODE_GMII; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 333 | |
| 334 | dev->autoneg = AUTONEG_ENABLE; |
| 335 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 336 | dev->is_c45 = is_c45; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 337 | dev->phy_id = phy_id; |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 338 | if (c45_ids) |
| 339 | dev->c45_ids = *c45_ids; |
Dan Carpenter | 47b356e | 2016-01-12 12:36:21 +0300 | [diff] [blame] | 340 | dev->irq = bus->irq[addr]; |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 341 | dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 342 | |
| 343 | dev->state = PHY_DOWN; |
| 344 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 345 | mutex_init(&dev->lock); |
Anton Vorontsov | 4f9c85a | 2010-01-18 05:37:16 +0000 | [diff] [blame] | 346 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
Florian Fainelli | 5ea94e7 | 2013-05-19 22:53:43 +0000 | [diff] [blame] | 347 | INIT_WORK(&dev->phy_queue, phy_change); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 348 | |
David Woodhouse | 8626d3b | 2010-04-02 01:05:27 +0000 | [diff] [blame] | 349 | /* Request the appropriate module unconditionally; don't |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 350 | * bother trying to do so only if it isn't already loaded, |
| 351 | * because that gets complicated. A hotplug event would have |
| 352 | * done an unconditional modprobe anyway. |
| 353 | * We don't do normal hotplug because it won't work for MDIO |
| 354 | * -- because it relies on the device staying around for long |
| 355 | * enough for the driver to get loaded. With MDIO, the NIC |
| 356 | * driver will get bored and give up as soon as it finds that |
| 357 | * there's no driver _already_ loaded. |
| 358 | */ |
David Woodhouse | 8626d3b | 2010-04-02 01:05:27 +0000 | [diff] [blame] | 359 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
| 360 | |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 361 | device_initialize(&mdiodev->dev); |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 362 | |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 363 | return dev; |
| 364 | } |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 365 | EXPORT_SYMBOL(phy_device_create); |
| 366 | |
Shaohui Xie | 5f6c99e | 2015-11-03 12:27:33 +0800 | [diff] [blame] | 367 | /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. |
| 368 | * @bus: the target MII bus |
| 369 | * @addr: PHY address on the MII bus |
| 370 | * @dev_addr: MMD address in the PHY. |
| 371 | * @devices_in_package: where to store the devices in package information. |
| 372 | * |
| 373 | * Description: reads devices in package registers of a MMD at @dev_addr |
| 374 | * from PHY at @addr on @bus. |
| 375 | * |
| 376 | * Returns: 0 on success, -EIO on failure. |
| 377 | */ |
| 378 | static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, |
| 379 | u32 *devices_in_package) |
| 380 | { |
| 381 | int phy_reg, reg_addr; |
| 382 | |
| 383 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; |
| 384 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 385 | if (phy_reg < 0) |
| 386 | return -EIO; |
| 387 | *devices_in_package = (phy_reg & 0xffff) << 16; |
| 388 | |
| 389 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; |
| 390 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 391 | if (phy_reg < 0) |
| 392 | return -EIO; |
| 393 | *devices_in_package |= (phy_reg & 0xffff); |
| 394 | |
| 395 | return 0; |
| 396 | } |
| 397 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 398 | /** |
| 399 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. |
| 400 | * @bus: the target MII bus |
| 401 | * @addr: PHY address on the MII bus |
| 402 | * @phy_id: where to store the ID retrieved. |
| 403 | * @c45_ids: where to store the c45 ID information. |
| 404 | * |
| 405 | * If the PHY devices-in-package appears to be valid, it and the |
| 406 | * corresponding identifiers are stored in @c45_ids, zero is stored |
| 407 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns |
| 408 | * zero on success. |
| 409 | * |
| 410 | */ |
| 411 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, |
| 412 | struct phy_c45_device_ids *c45_ids) { |
| 413 | int phy_reg; |
| 414 | int i, reg_addr; |
| 415 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); |
Shaohui Xie | 5f6c99e | 2015-11-03 12:27:33 +0800 | [diff] [blame] | 416 | u32 *devs = &c45_ids->devices_in_package; |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 417 | |
Shaohui Xie | 5f6c99e | 2015-11-03 12:27:33 +0800 | [diff] [blame] | 418 | /* Find first non-zero Devices In package. Device zero is reserved |
| 419 | * for 802.3 c45 complied PHYs, so don't probe it at first. |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 420 | */ |
Shaohui Xie | 5f6c99e | 2015-11-03 12:27:33 +0800 | [diff] [blame] | 421 | for (i = 1; i < num_ids && *devs == 0; i++) { |
| 422 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 423 | if (phy_reg < 0) |
| 424 | return -EIO; |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 425 | |
Shaohui Xie | 5f6c99e | 2015-11-03 12:27:33 +0800 | [diff] [blame] | 426 | if ((*devs & 0x1fffffff) == 0x1fffffff) { |
| 427 | /* If mostly Fs, there is no device there, |
| 428 | * then let's continue to probe more, as some |
| 429 | * 10G PHYs have zero Devices In package, |
| 430 | * e.g. Cortina CS4315/CS4340 PHY. |
| 431 | */ |
| 432 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); |
| 433 | if (phy_reg < 0) |
| 434 | return -EIO; |
| 435 | /* no device there, let's get out of here */ |
| 436 | if ((*devs & 0x1fffffff) == 0x1fffffff) { |
Shengzhou Liu | da1da28 | 2015-06-26 17:58:52 +0800 | [diff] [blame] | 437 | *phy_id = 0xffffffff; |
| 438 | return 0; |
Shaohui Xie | 5f6c99e | 2015-11-03 12:27:33 +0800 | [diff] [blame] | 439 | } else { |
| 440 | break; |
Shengzhou Liu | da1da28 | 2015-06-26 17:58:52 +0800 | [diff] [blame] | 441 | } |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 442 | } |
| 443 | } |
| 444 | |
| 445 | /* Now probe Device Identifiers for each device present. */ |
| 446 | for (i = 1; i < num_ids; i++) { |
| 447 | if (!(c45_ids->devices_in_package & (1 << i))) |
| 448 | continue; |
| 449 | |
| 450 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; |
| 451 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 452 | if (phy_reg < 0) |
| 453 | return -EIO; |
| 454 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; |
| 455 | |
| 456 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; |
| 457 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 458 | if (phy_reg < 0) |
| 459 | return -EIO; |
| 460 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); |
| 461 | } |
| 462 | *phy_id = 0; |
| 463 | return 0; |
| 464 | } |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 465 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 466 | /** |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 467 | * get_phy_id - reads the specified addr for its ID. |
| 468 | * @bus: the target MII bus |
| 469 | * @addr: PHY address on the MII bus |
| 470 | * @phy_id: where to store the ID retrieved. |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 471 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
| 472 | * @c45_ids: where to store the c45 ID information. |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 473 | * |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 474 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers |
| 475 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns |
| 476 | * zero on success. |
| 477 | * |
| 478 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and |
| 479 | * its return value is in turn returned. |
| 480 | * |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 481 | */ |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 482 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
| 483 | bool is_c45, struct phy_c45_device_ids *c45_ids) |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 484 | { |
| 485 | int phy_reg; |
| 486 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 487 | if (is_c45) |
| 488 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); |
| 489 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 490 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
David Daney | 6fe3264 | 2011-09-30 11:51:22 +0000 | [diff] [blame] | 491 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 492 | if (phy_reg < 0) |
| 493 | return -EIO; |
| 494 | |
| 495 | *phy_id = (phy_reg & 0xffff) << 16; |
| 496 | |
| 497 | /* Grab the bits from PHYIR2, and put them in the lower half */ |
David Daney | 6fe3264 | 2011-09-30 11:51:22 +0000 | [diff] [blame] | 498 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 499 | if (phy_reg < 0) |
| 500 | return -EIO; |
| 501 | |
| 502 | *phy_id |= (phy_reg & 0xffff); |
| 503 | |
| 504 | return 0; |
| 505 | } |
| 506 | |
| 507 | /** |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 508 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
| 509 | * struct |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 510 | * @bus: the target MII bus |
| 511 | * @addr: PHY address on the MII bus |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 512 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 513 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 514 | * Description: Reads the ID registers of the PHY at @addr on the |
| 515 | * @bus, then allocates and returns the phy_device to represent it. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 516 | */ |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 517 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 518 | { |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 519 | struct phy_c45_device_ids c45_ids = {0}; |
David S. Miller | 160c85f | 2012-06-27 21:28:14 -0700 | [diff] [blame] | 520 | u32 phy_id = 0; |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 521 | int r; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 522 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 523 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 524 | if (r) |
| 525 | return ERR_PTR(r); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 526 | |
Giuseppe Cavallaro | 6436cbc | 2008-11-20 20:43:18 -0800 | [diff] [blame] | 527 | /* If the phy_id is mostly Fs, there is no device there */ |
| 528 | if ((phy_id & 0x1fffffff) == 0x1fffffff) |
Sergei Shtylyov | b74766a | 2016-04-24 20:25:23 +0300 | [diff] [blame] | 529 | return ERR_PTR(-ENODEV); |
Giuseppe Cavallaro | 6436cbc | 2008-11-20 20:43:18 -0800 | [diff] [blame] | 530 | |
Sergei Shtylyov | e62a768 | 2014-01-05 03:21:52 +0300 | [diff] [blame] | 531 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 532 | } |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 533 | EXPORT_SYMBOL(get_phy_device); |
| 534 | |
Andrew Lunn | 5cf11be | 2016-01-06 20:11:19 +0100 | [diff] [blame] | 535 | static ssize_t |
| 536 | phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 537 | { |
| 538 | struct phy_device *phydev = to_phy_device(dev); |
| 539 | |
| 540 | return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); |
| 541 | } |
| 542 | static DEVICE_ATTR_RO(phy_id); |
| 543 | |
| 544 | static ssize_t |
| 545 | phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 546 | { |
| 547 | struct phy_device *phydev = to_phy_device(dev); |
| 548 | const char *mode = NULL; |
| 549 | |
| 550 | if (phy_is_internal(phydev)) |
| 551 | mode = "internal"; |
| 552 | else |
| 553 | mode = phy_modes(phydev->interface); |
| 554 | |
| 555 | return sprintf(buf, "%s\n", mode); |
| 556 | } |
| 557 | static DEVICE_ATTR_RO(phy_interface); |
| 558 | |
| 559 | static ssize_t |
| 560 | phy_has_fixups_show(struct device *dev, struct device_attribute *attr, |
| 561 | char *buf) |
| 562 | { |
| 563 | struct phy_device *phydev = to_phy_device(dev); |
| 564 | |
| 565 | return sprintf(buf, "%d\n", phydev->has_fixups); |
| 566 | } |
| 567 | static DEVICE_ATTR_RO(phy_has_fixups); |
| 568 | |
| 569 | static struct attribute *phy_dev_attrs[] = { |
| 570 | &dev_attr_phy_id.attr, |
| 571 | &dev_attr_phy_interface.attr, |
| 572 | &dev_attr_phy_has_fixups.attr, |
| 573 | NULL, |
| 574 | }; |
| 575 | ATTRIBUTE_GROUPS(phy_dev); |
| 576 | |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 577 | /** |
| 578 | * phy_device_register - Register the phy device on the MDIO bus |
Randy Dunlap | 1d4ac5d | 2009-06-16 16:56:33 +0000 | [diff] [blame] | 579 | * @phydev: phy_device structure to be added to the MDIO bus |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 580 | */ |
| 581 | int phy_device_register(struct phy_device *phydev) |
| 582 | { |
| 583 | int err; |
| 584 | |
Andrew Lunn | 7f85442 | 2016-01-06 20:11:18 +0100 | [diff] [blame] | 585 | err = mdiobus_register_device(&phydev->mdio); |
| 586 | if (err) |
| 587 | return err; |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 588 | |
| 589 | /* Run all of the fixups for this PHY */ |
Florian Fainelli | d92f5de | 2014-07-28 16:28:07 -0700 | [diff] [blame] | 590 | err = phy_scan_fixups(phydev); |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 591 | if (err) { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 592 | pr_err("PHY %d failed to initialize\n", phydev->mdio.addr); |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 593 | goto out; |
| 594 | } |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 595 | |
Andrew Lunn | 5cf11be | 2016-01-06 20:11:19 +0100 | [diff] [blame] | 596 | phydev->mdio.dev.groups = phy_dev_groups; |
| 597 | |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 598 | err = device_add(&phydev->mdio.dev); |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 599 | if (err) { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 600 | pr_err("PHY %d failed to add\n", phydev->mdio.addr); |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 601 | goto out; |
| 602 | } |
| 603 | |
| 604 | return 0; |
| 605 | |
| 606 | out: |
Andrew Lunn | 7f85442 | 2016-01-06 20:11:18 +0100 | [diff] [blame] | 607 | mdiobus_unregister_device(&phydev->mdio); |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 608 | return err; |
| 609 | } |
| 610 | EXPORT_SYMBOL(phy_device_register); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 611 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 612 | /** |
Russell King | 38737e4 | 2015-09-24 20:36:28 +0100 | [diff] [blame] | 613 | * phy_device_remove - Remove a previously registered phy device from the MDIO bus |
| 614 | * @phydev: phy_device structure to remove |
| 615 | * |
| 616 | * This doesn't free the phy_device itself, it merely reverses the effects |
| 617 | * of phy_device_register(). Use phy_device_free() to free the device |
| 618 | * after calling this function. |
| 619 | */ |
| 620 | void phy_device_remove(struct phy_device *phydev) |
| 621 | { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 622 | device_del(&phydev->mdio.dev); |
Andrew Lunn | 7f85442 | 2016-01-06 20:11:18 +0100 | [diff] [blame] | 623 | mdiobus_unregister_device(&phydev->mdio); |
Russell King | 38737e4 | 2015-09-24 20:36:28 +0100 | [diff] [blame] | 624 | } |
| 625 | EXPORT_SYMBOL(phy_device_remove); |
| 626 | |
| 627 | /** |
Jiri Pirko | f8f76db | 2010-02-04 10:23:02 -0800 | [diff] [blame] | 628 | * phy_find_first - finds the first PHY device on the bus |
| 629 | * @bus: the target MII bus |
| 630 | */ |
| 631 | struct phy_device *phy_find_first(struct mii_bus *bus) |
| 632 | { |
Andrew Lunn | 7f85442 | 2016-01-06 20:11:18 +0100 | [diff] [blame] | 633 | struct phy_device *phydev; |
Jiri Pirko | f8f76db | 2010-02-04 10:23:02 -0800 | [diff] [blame] | 634 | int addr; |
| 635 | |
| 636 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { |
Andrew Lunn | 7f85442 | 2016-01-06 20:11:18 +0100 | [diff] [blame] | 637 | phydev = mdiobus_get_phy(bus, addr); |
| 638 | if (phydev) |
| 639 | return phydev; |
Jiri Pirko | f8f76db | 2010-02-04 10:23:02 -0800 | [diff] [blame] | 640 | } |
| 641 | return NULL; |
| 642 | } |
| 643 | EXPORT_SYMBOL(phy_find_first); |
| 644 | |
| 645 | /** |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 646 | * phy_prepare_link - prepares the PHY layer to monitor link status |
| 647 | * @phydev: target phy_device struct |
| 648 | * @handler: callback function for link status change notifications |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 649 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 650 | * Description: Tells the PHY infrastructure to handle the |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 651 | * gory details on monitoring link status (whether through |
| 652 | * polling or an interrupt), and to call back to the |
| 653 | * connected device driver when the link status changes. |
| 654 | * If you want to monitor your own link state, don't call |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 655 | * this function. |
| 656 | */ |
stephen hemminger | 89ff05e | 2010-10-21 08:37:41 +0000 | [diff] [blame] | 657 | static void phy_prepare_link(struct phy_device *phydev, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 658 | void (*handler)(struct net_device *)) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 659 | { |
| 660 | phydev->adjust_link = handler; |
| 661 | } |
| 662 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 663 | /** |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 664 | * phy_connect_direct - connect an ethernet device to a specific phy_device |
| 665 | * @dev: the network device to connect |
| 666 | * @phydev: the pointer to the phy device |
| 667 | * @handler: callback function for state change notifications |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 668 | * @interface: PHY device's interface |
| 669 | */ |
| 670 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 671 | void (*handler)(struct net_device *), |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 672 | phy_interface_t interface) |
| 673 | { |
| 674 | int rc; |
| 675 | |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 676 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 677 | if (rc) |
| 678 | return rc; |
| 679 | |
| 680 | phy_prepare_link(phydev, handler); |
Sergei Shtylyov | 29935ae | 2014-01-05 03:27:17 +0300 | [diff] [blame] | 681 | phy_start_machine(phydev); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 682 | if (phydev->irq > 0) |
| 683 | phy_start_interrupts(phydev); |
| 684 | |
| 685 | return 0; |
| 686 | } |
| 687 | EXPORT_SYMBOL(phy_connect_direct); |
| 688 | |
| 689 | /** |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 690 | * phy_connect - connect an ethernet device to a PHY device |
| 691 | * @dev: the network device to connect |
Randy Dunlap | 5d12b13 | 2008-04-28 10:58:22 -0700 | [diff] [blame] | 692 | * @bus_id: the id string of the PHY device to connect |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 693 | * @handler: callback function for state change notifications |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 694 | * @interface: PHY device's interface |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 695 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 696 | * Description: Convenience function for connecting ethernet |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 697 | * devices to PHY devices. The default behavior is for |
| 698 | * the PHY infrastructure to handle everything, and only notify |
| 699 | * the connected driver when the link status changes. If you |
| 700 | * don't want, or can't use the provided functionality, you may |
| 701 | * choose to call only the subset of functions which provide |
| 702 | * the desired functionality. |
| 703 | */ |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 704 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 705 | void (*handler)(struct net_device *), |
| 706 | phy_interface_t interface) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 707 | { |
| 708 | struct phy_device *phydev; |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 709 | struct device *d; |
| 710 | int rc; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 711 | |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 712 | /* Search the list of PHY devices on the mdio bus for the |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 713 | * PHY with the requested name |
| 714 | */ |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 715 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
| 716 | if (!d) { |
| 717 | pr_err("PHY %s not found\n", bus_id); |
| 718 | return ERR_PTR(-ENODEV); |
| 719 | } |
| 720 | phydev = to_phy_device(d); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 721 | |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 722 | rc = phy_connect_direct(dev, phydev, handler, interface); |
Johan Hovold | 17ae1c6 | 2016-11-03 18:40:19 +0100 | [diff] [blame] | 723 | put_device(d); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 724 | if (rc) |
| 725 | return ERR_PTR(rc); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 726 | |
| 727 | return phydev; |
| 728 | } |
| 729 | EXPORT_SYMBOL(phy_connect); |
| 730 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 731 | /** |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 732 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
| 733 | * device |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 734 | * @phydev: target phy_device struct |
| 735 | */ |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 736 | void phy_disconnect(struct phy_device *phydev) |
| 737 | { |
| 738 | if (phydev->irq > 0) |
| 739 | phy_stop_interrupts(phydev); |
| 740 | |
| 741 | phy_stop_machine(phydev); |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 742 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 743 | phydev->adjust_link = NULL; |
| 744 | |
| 745 | phy_detach(phydev); |
| 746 | } |
| 747 | EXPORT_SYMBOL(phy_disconnect); |
| 748 | |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 749 | /** |
| 750 | * phy_poll_reset - Safely wait until a PHY reset has properly completed |
| 751 | * @phydev: The PHY device to poll |
| 752 | * |
| 753 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as |
| 754 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR |
| 755 | * register must be polled until the BMCR_RESET bit clears. |
| 756 | * |
| 757 | * Furthermore, any attempts to write to PHY registers may have no effect |
| 758 | * or even generate MDIO bus errors until this is complete. |
| 759 | * |
| 760 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the |
| 761 | * standard and do not fully reset after the BMCR_RESET bit is set, and may |
| 762 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an |
| 763 | * effort to support such broken PHYs, this function is separate from the |
| 764 | * standard phy_init_hw() which will zero all the other bits in the BMCR |
| 765 | * and reapply all driver-specific and board-specific fixups. |
| 766 | */ |
| 767 | static int phy_poll_reset(struct phy_device *phydev) |
| 768 | { |
| 769 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ |
| 770 | unsigned int retries = 12; |
| 771 | int ret; |
| 772 | |
| 773 | do { |
| 774 | msleep(50); |
| 775 | ret = phy_read(phydev, MII_BMCR); |
| 776 | if (ret < 0) |
| 777 | return ret; |
| 778 | } while (ret & BMCR_RESET && --retries); |
| 779 | if (ret & BMCR_RESET) |
| 780 | return -ETIMEDOUT; |
| 781 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 782 | /* Some chips (smsc911x) may still need up to another 1ms after the |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 783 | * BMCR_RESET bit is cleared before they are usable. |
| 784 | */ |
| 785 | msleep(1); |
| 786 | return 0; |
| 787 | } |
| 788 | |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 789 | int phy_init_hw(struct phy_device *phydev) |
| 790 | { |
Florian Fainelli | 9df81dd | 2014-02-17 13:34:03 -0800 | [diff] [blame] | 791 | int ret = 0; |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 792 | |
| 793 | if (!phydev->drv || !phydev->drv->config_init) |
| 794 | return 0; |
| 795 | |
Florian Fainelli | 9df81dd | 2014-02-17 13:34:03 -0800 | [diff] [blame] | 796 | if (phydev->drv->soft_reset) |
| 797 | ret = phydev->drv->soft_reset(phydev); |
| 798 | else |
| 799 | ret = genphy_soft_reset(phydev); |
| 800 | |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 801 | if (ret < 0) |
| 802 | return ret; |
| 803 | |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 804 | ret = phy_scan_fixups(phydev); |
| 805 | if (ret < 0) |
| 806 | return ret; |
| 807 | |
| 808 | return phydev->drv->config_init(phydev); |
| 809 | } |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 810 | EXPORT_SYMBOL(phy_init_hw); |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 811 | |
Andrew Lunn | 2220943 | 2016-01-06 20:11:13 +0100 | [diff] [blame] | 812 | void phy_attached_info(struct phy_device *phydev) |
| 813 | { |
| 814 | phy_attached_print(phydev, NULL); |
| 815 | } |
| 816 | EXPORT_SYMBOL(phy_attached_info); |
| 817 | |
| 818 | #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)" |
| 819 | void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) |
| 820 | { |
| 821 | if (!fmt) { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 822 | dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n", |
Andrew Lunn | 2220943 | 2016-01-06 20:11:13 +0100 | [diff] [blame] | 823 | phydev->drv->name, phydev_name(phydev), |
| 824 | phydev->irq); |
| 825 | } else { |
| 826 | va_list ap; |
| 827 | |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 828 | dev_info(&phydev->mdio.dev, ATTACHED_FMT, |
Andrew Lunn | 2220943 | 2016-01-06 20:11:13 +0100 | [diff] [blame] | 829 | phydev->drv->name, phydev_name(phydev), |
| 830 | phydev->irq); |
| 831 | |
| 832 | va_start(ap, fmt); |
| 833 | vprintk(fmt, ap); |
| 834 | va_end(ap); |
| 835 | } |
| 836 | } |
| 837 | EXPORT_SYMBOL(phy_attached_print); |
| 838 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 839 | /** |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 840 | * phy_attach_direct - attach a network device to a given PHY device pointer |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 841 | * @dev: network device to attach |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 842 | * @phydev: Pointer to phy_device to attach |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 843 | * @flags: PHY device's dev_flags |
| 844 | * @interface: PHY device's interface |
| 845 | * |
| 846 | * Description: Called by drivers to attach to a particular PHY |
| 847 | * device. The phy_device is found, and properly hooked up |
Andy Fleming | 257184d | 2014-01-10 14:27:54 +0800 | [diff] [blame] | 848 | * to the phy_driver. If no driver is attached, then a |
| 849 | * generic driver is used. The phy_device is given a ptr to |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 850 | * the attaching device, and given a callback for link status |
| 851 | * change. The phy_device is returned to the attaching driver. |
Russell King | 7322967 | 2015-09-24 20:36:08 +0100 | [diff] [blame] | 852 | * This function takes a reference on the phy device. |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 853 | */ |
Andy Fleming | 257184d | 2014-01-10 14:27:54 +0800 | [diff] [blame] | 854 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
| 855 | u32 flags, phy_interface_t interface) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 856 | { |
Florian Fainelli | ec988ad | 2016-12-06 20:54:43 -0800 | [diff] [blame] | 857 | struct module *ndev_owner = dev->dev.parent->driver->owner; |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 858 | struct mii_bus *bus = phydev->mdio.bus; |
| 859 | struct device *d = &phydev->mdio.dev; |
Florian Fainelli | 3a6ebd3 | 2017-02-08 19:05:26 -0800 | [diff] [blame] | 860 | bool using_genphy = false; |
Marc Kleine-Budde | d005a09 | 2011-03-28 14:54:08 +0000 | [diff] [blame] | 861 | int err; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 862 | |
Florian Fainelli | ec988ad | 2016-12-06 20:54:43 -0800 | [diff] [blame] | 863 | /* For Ethernet device drivers that register their own MDIO bus, we |
| 864 | * will have bus->owner match ndev_mod, so we do not want to increment |
| 865 | * our own module->refcnt here, otherwise we would not be able to |
| 866 | * unload later on. |
| 867 | */ |
| 868 | if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 869 | dev_err(&dev->dev, "failed to get the bus module\n"); |
| 870 | return -EIO; |
| 871 | } |
| 872 | |
Russell King | 7322967 | 2015-09-24 20:36:08 +0100 | [diff] [blame] | 873 | get_device(d); |
| 874 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 875 | /* Assume that if there is no driver, that it doesn't |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 876 | * exist, and we should use the genphy driver. |
| 877 | */ |
Sergei Shtylyov | ef899c0 | 2015-08-28 21:35:14 +0300 | [diff] [blame] | 878 | if (!d->driver) { |
Andy Fleming | 257184d | 2014-01-10 14:27:54 +0800 | [diff] [blame] | 879 | if (phydev->is_c45) |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 880 | d->driver = |
| 881 | &genphy_driver[GENPHY_DRV_10G].mdiodrv.driver; |
Andy Fleming | 257184d | 2014-01-10 14:27:54 +0800 | [diff] [blame] | 882 | else |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 883 | d->driver = |
| 884 | &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 885 | |
Florian Fainelli | 3a6ebd3 | 2017-02-08 19:05:26 -0800 | [diff] [blame] | 886 | using_genphy = true; |
| 887 | } |
| 888 | |
| 889 | if (!try_module_get(d->driver->owner)) { |
| 890 | dev_err(&dev->dev, "failed to get the device driver module\n"); |
| 891 | err = -EIO; |
| 892 | goto error_put_device; |
| 893 | } |
| 894 | |
| 895 | if (using_genphy) { |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 896 | err = d->driver->probe(d); |
Jeff Garzik | b7a00ec | 2006-10-01 07:27:46 -0400 | [diff] [blame] | 897 | if (err >= 0) |
| 898 | err = device_bind_driver(d); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 899 | |
Jeff Garzik | b7a00ec | 2006-10-01 07:27:46 -0400 | [diff] [blame] | 900 | if (err) |
Florian Fainelli | 3a6ebd3 | 2017-02-08 19:05:26 -0800 | [diff] [blame] | 901 | goto error_module_put; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | if (phydev->attached_dev) { |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 905 | dev_err(&dev->dev, "PHY already attached\n"); |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 906 | err = -EBUSY; |
| 907 | goto error; |
Ezequiel Garcia | b3565f2 | 2014-07-23 16:47:32 -0300 | [diff] [blame] | 908 | } |
| 909 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 910 | phydev->attached_dev = dev; |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 911 | dev->phydev = phydev; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 912 | |
| 913 | phydev->dev_flags = flags; |
| 914 | |
Andy Fleming | e8a2b6a | 2006-12-01 12:01:06 -0600 | [diff] [blame] | 915 | phydev->interface = interface; |
| 916 | |
Anton Vorontsov | ef24b16 | 2010-08-24 14:46:12 -0700 | [diff] [blame] | 917 | phydev->state = PHY_READY; |
| 918 | |
Sjoerd Simons | 113c74d | 2016-01-14 21:57:18 +0100 | [diff] [blame] | 919 | /* Initial carrier state is off as the phy is about to be |
| 920 | * (re)initialized. |
| 921 | */ |
| 922 | netif_carrier_off(phydev->attached_dev); |
| 923 | |
Andy Fleming | e8a2b6a | 2006-12-01 12:01:06 -0600 | [diff] [blame] | 924 | /* Do initial configuration here, now that |
| 925 | * we have certain key parameters |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 926 | * (dev_flags and interface) |
| 927 | */ |
Marc Kleine-Budde | d005a09 | 2011-03-28 14:54:08 +0000 | [diff] [blame] | 928 | err = phy_init_hw(phydev); |
| 929 | if (err) |
| 930 | phy_detach(phydev); |
Guenter Roeck | b394745 | 2014-05-14 13:12:49 -0700 | [diff] [blame] | 931 | else |
| 932 | phy_resume(phydev); |
Sebastian Hesselbarth | 1211ce5 | 2013-12-13 10:20:28 +0100 | [diff] [blame] | 933 | |
Marc Kleine-Budde | d005a09 | 2011-03-28 14:54:08 +0000 | [diff] [blame] | 934 | return err; |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 935 | |
| 936 | error: |
Florian Fainelli | 3a6ebd3 | 2017-02-08 19:05:26 -0800 | [diff] [blame] | 937 | /* phy_detach() does all of the cleanup below */ |
| 938 | phy_detach(phydev); |
| 939 | return err; |
| 940 | |
| 941 | error_module_put: |
Mao Wenan | ea14fab | 2017-05-23 21:54:00 -0400 | [diff] [blame] | 942 | module_put(d->driver->owner); |
Florian Fainelli | 3a6ebd3 | 2017-02-08 19:05:26 -0800 | [diff] [blame] | 943 | error_put_device: |
| 944 | put_device(d); |
Florian Fainelli | ec988ad | 2016-12-06 20:54:43 -0800 | [diff] [blame] | 945 | if (ndev_owner != bus->owner) |
| 946 | module_put(bus->owner); |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 947 | return err; |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 948 | } |
Andy Fleming | 257184d | 2014-01-10 14:27:54 +0800 | [diff] [blame] | 949 | EXPORT_SYMBOL(phy_attach_direct); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 950 | |
| 951 | /** |
| 952 | * phy_attach - attach a network device to a particular PHY device |
| 953 | * @dev: network device to attach |
| 954 | * @bus_id: Bus ID of PHY device to attach |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 955 | * @interface: PHY device's interface |
| 956 | * |
| 957 | * Description: Same as phy_attach_direct() except that a PHY bus_id |
| 958 | * string is passed instead of a pointer to a struct phy_device. |
| 959 | */ |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 960 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
| 961 | phy_interface_t interface) |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 962 | { |
| 963 | struct bus_type *bus = &mdio_bus_type; |
| 964 | struct phy_device *phydev; |
| 965 | struct device *d; |
| 966 | int rc; |
| 967 | |
| 968 | /* Search the list of PHY devices on the mdio bus for the |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 969 | * PHY with the requested name |
| 970 | */ |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 971 | d = bus_find_device_by_name(bus, NULL, bus_id); |
| 972 | if (!d) { |
| 973 | pr_err("PHY %s not found\n", bus_id); |
| 974 | return ERR_PTR(-ENODEV); |
| 975 | } |
| 976 | phydev = to_phy_device(d); |
| 977 | |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 978 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
Johan Hovold | 17ae1c6 | 2016-11-03 18:40:19 +0100 | [diff] [blame] | 979 | put_device(d); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 980 | if (rc) |
| 981 | return ERR_PTR(rc); |
| 982 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 983 | return phydev; |
| 984 | } |
| 985 | EXPORT_SYMBOL(phy_attach); |
| 986 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 987 | /** |
| 988 | * phy_detach - detach a PHY device from its network device |
| 989 | * @phydev: target phy_device struct |
Russell King | 7322967 | 2015-09-24 20:36:08 +0100 | [diff] [blame] | 990 | * |
| 991 | * This detaches the phy device from its network device and the phy |
| 992 | * driver, and drops the reference count taken in phy_attach_direct(). |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 993 | */ |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 994 | void phy_detach(struct phy_device *phydev) |
| 995 | { |
Florian Fainelli | ec988ad | 2016-12-06 20:54:43 -0800 | [diff] [blame] | 996 | struct net_device *dev = phydev->attached_dev; |
| 997 | struct module *ndev_owner = dev->dev.parent->driver->owner; |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 998 | struct mii_bus *bus; |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 999 | int i; |
Ezequiel Garcia | b3565f2 | 2014-07-23 16:47:32 -0300 | [diff] [blame] | 1000 | |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 1001 | phydev->attached_dev->phydev = NULL; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1002 | phydev->attached_dev = NULL; |
Sebastian Hesselbarth | 1211ce5 | 2013-12-13 10:20:28 +0100 | [diff] [blame] | 1003 | phy_suspend(phydev); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1004 | |
Florian Fainelli | 3a6ebd3 | 2017-02-08 19:05:26 -0800 | [diff] [blame] | 1005 | module_put(phydev->mdio.dev.driver->owner); |
| 1006 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1007 | /* If the device had no specific driver before (i.e. - it |
| 1008 | * was using the generic driver), we unbind the device |
| 1009 | * from the generic driver so that there's a chance a |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1010 | * real driver could be loaded |
| 1011 | */ |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 1012 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 1013 | if (phydev->mdio.dev.driver == |
| 1014 | &genphy_driver[i].mdiodrv.driver) { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1015 | device_release_driver(&phydev->mdio.dev); |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 1016 | break; |
| 1017 | } |
| 1018 | } |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 1019 | |
Russell King | 7322967 | 2015-09-24 20:36:08 +0100 | [diff] [blame] | 1020 | /* |
| 1021 | * The phydev might go away on the put_device() below, so avoid |
| 1022 | * a use-after-free bug by reading the underlying bus first. |
| 1023 | */ |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1024 | bus = phydev->mdio.bus; |
Russell King | 3e3aaf6 | 2015-09-24 20:36:02 +0100 | [diff] [blame] | 1025 | |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1026 | put_device(&phydev->mdio.dev); |
Florian Fainelli | ec988ad | 2016-12-06 20:54:43 -0800 | [diff] [blame] | 1027 | if (ndev_owner != bus->owner) |
| 1028 | module_put(bus->owner); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1029 | } |
| 1030 | EXPORT_SYMBOL(phy_detach); |
| 1031 | |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1032 | int phy_suspend(struct phy_device *phydev) |
| 1033 | { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1034 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
Sebastian Hesselbarth | 32fc3fd | 2014-03-14 10:07:44 +0100 | [diff] [blame] | 1035 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
Florian Fainelli | 8a477a6 | 2015-01-26 22:05:39 -0800 | [diff] [blame] | 1036 | int ret = 0; |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1037 | |
| 1038 | /* If the device has WOL enabled, we cannot suspend the PHY */ |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1039 | phy_ethtool_get_wol(phydev, &wol); |
| 1040 | if (wol.wolopts) |
| 1041 | return -EBUSY; |
| 1042 | |
| 1043 | if (phydrv->suspend) |
Florian Fainelli | 8a477a6 | 2015-01-26 22:05:39 -0800 | [diff] [blame] | 1044 | ret = phydrv->suspend(phydev); |
| 1045 | |
| 1046 | if (ret) |
| 1047 | return ret; |
| 1048 | |
| 1049 | phydev->suspended = true; |
| 1050 | |
| 1051 | return ret; |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1052 | } |
Florian Fainelli | ca12769 | 2014-07-08 10:38:36 -0700 | [diff] [blame] | 1053 | EXPORT_SYMBOL(phy_suspend); |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1054 | |
| 1055 | int phy_resume(struct phy_device *phydev) |
| 1056 | { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1057 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
Florian Fainelli | 8a477a6 | 2015-01-26 22:05:39 -0800 | [diff] [blame] | 1058 | int ret = 0; |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1059 | |
| 1060 | if (phydrv->resume) |
Florian Fainelli | 8a477a6 | 2015-01-26 22:05:39 -0800 | [diff] [blame] | 1061 | ret = phydrv->resume(phydev); |
| 1062 | |
| 1063 | if (ret) |
| 1064 | return ret; |
| 1065 | |
| 1066 | phydev->suspended = false; |
| 1067 | |
| 1068 | return ret; |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 1069 | } |
Florian Fainelli | ca12769 | 2014-07-08 10:38:36 -0700 | [diff] [blame] | 1070 | EXPORT_SYMBOL(phy_resume); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1071 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1072 | /* Generic PHY support and helper functions */ |
| 1073 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1074 | /** |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1075 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1076 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1077 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1078 | * Description: Writes MII_ADVERTISE with the appropriate values, |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1079 | * after sanitizing the values to make sure we only advertise |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 1080 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
| 1081 | * hasn't changed, and > 0 if it has changed. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1082 | */ |
stephen hemminger | 89ff05e | 2010-10-21 08:37:41 +0000 | [diff] [blame] | 1083 | static int genphy_config_advert(struct phy_device *phydev) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1084 | { |
| 1085 | u32 advertise; |
Florian Fainelli | 5273e3a | 2014-02-03 12:35:46 -0800 | [diff] [blame] | 1086 | int oldadv, adv, bmsr; |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 1087 | int err, changed = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1088 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1089 | /* Only allow advertising what this PHY supports */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1090 | phydev->advertising &= phydev->supported; |
| 1091 | advertise = phydev->advertising; |
| 1092 | |
| 1093 | /* Setup standard advertisement */ |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1094 | adv = phy_read(phydev, MII_ADVERTISE); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1095 | if (adv < 0) |
| 1096 | return adv; |
| 1097 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1098 | oldadv = adv; |
Matt Carlson | 28011cf | 2011-11-16 18:36:59 -0500 | [diff] [blame] | 1099 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1100 | ADVERTISE_PAUSE_ASYM); |
Matt Carlson | 37f0702 | 2011-11-17 14:30:55 +0000 | [diff] [blame] | 1101 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1102 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 1103 | if (adv != oldadv) { |
| 1104 | err = phy_write(phydev, MII_ADVERTISE, adv); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1105 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 1106 | if (err < 0) |
| 1107 | return err; |
| 1108 | changed = 1; |
| 1109 | } |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1110 | |
Florian Fainelli | 5273e3a | 2014-02-03 12:35:46 -0800 | [diff] [blame] | 1111 | bmsr = phy_read(phydev, MII_BMSR); |
| 1112 | if (bmsr < 0) |
| 1113 | return bmsr; |
| 1114 | |
| 1115 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all |
| 1116 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a |
| 1117 | * logical 1. |
| 1118 | */ |
| 1119 | if (!(bmsr & BMSR_ESTATEN)) |
| 1120 | return changed; |
| 1121 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1122 | /* Configure gigabit if it's supported */ |
Florian Fainelli | 5273e3a | 2014-02-03 12:35:46 -0800 | [diff] [blame] | 1123 | adv = phy_read(phydev, MII_CTRL1000); |
| 1124 | if (adv < 0) |
| 1125 | return adv; |
| 1126 | |
| 1127 | oldadv = adv; |
| 1128 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); |
| 1129 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1130 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1131 | SUPPORTED_1000baseT_Full)) { |
Matt Carlson | 37f0702 | 2011-11-17 14:30:55 +0000 | [diff] [blame] | 1132 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1133 | } |
| 1134 | |
Mugunthan V N | eb68623 | 2015-06-25 22:21:02 +0530 | [diff] [blame] | 1135 | if (adv != oldadv) |
| 1136 | changed = 1; |
| 1137 | |
Florian Fainelli | 5273e3a | 2014-02-03 12:35:46 -0800 | [diff] [blame] | 1138 | err = phy_write(phydev, MII_CTRL1000, adv); |
| 1139 | if (err < 0) |
| 1140 | return err; |
| 1141 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 1142 | return changed; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1143 | } |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1144 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1145 | /** |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1146 | * genphy_config_eee_advert - disable unwanted eee mode advertisement |
| 1147 | * @phydev: target phy_device struct |
| 1148 | * |
| 1149 | * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy |
| 1150 | * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't |
| 1151 | * changed, and 1 if it has changed. |
| 1152 | */ |
| 1153 | static int genphy_config_eee_advert(struct phy_device *phydev) |
| 1154 | { |
jbrunet | 40373d9 | 2016-12-19 16:05:36 +0100 | [diff] [blame] | 1155 | int broken = phydev->eee_broken_modes; |
| 1156 | int old_adv, adv; |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1157 | |
| 1158 | /* Nothing to disable */ |
| 1159 | if (!broken) |
| 1160 | return 0; |
| 1161 | |
| 1162 | /* If the following call fails, we assume that EEE is not |
| 1163 | * supported by the phy. If we read 0, EEE is not advertised |
| 1164 | * In both case, we don't need to continue |
| 1165 | */ |
| 1166 | adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN); |
| 1167 | if (adv <= 0) |
| 1168 | return 0; |
| 1169 | |
| 1170 | old_adv = adv; |
| 1171 | adv &= ~broken; |
| 1172 | |
| 1173 | /* Advertising remains unchanged with the broken mask */ |
| 1174 | if (old_adv == adv) |
| 1175 | return 0; |
| 1176 | |
| 1177 | phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, adv); |
| 1178 | |
| 1179 | return 1; |
| 1180 | } |
| 1181 | |
| 1182 | /** |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1183 | * genphy_setup_forced - configures/forces speed/duplex from @phydev |
| 1184 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1185 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1186 | * Description: Configures MII_BMCR to force speed/duplex |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1187 | * to the values in phydev. Assumes that the values are valid. |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1188 | * Please see phy_sanitize_settings(). |
| 1189 | */ |
Madalin Bucur | 3fb69bc | 2013-11-20 16:38:19 -0600 | [diff] [blame] | 1190 | int genphy_setup_forced(struct phy_device *phydev) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1191 | { |
wangweidong | f48256e | 2016-04-14 15:43:52 +0800 | [diff] [blame] | 1192 | int ctl = phy_read(phydev, MII_BMCR); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1193 | |
wangweidong | f48256e | 2016-04-14 15:43:52 +0800 | [diff] [blame] | 1194 | ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1195 | phydev->pause = 0; |
| 1196 | phydev->asym_pause = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1197 | |
| 1198 | if (SPEED_1000 == phydev->speed) |
| 1199 | ctl |= BMCR_SPEED1000; |
| 1200 | else if (SPEED_100 == phydev->speed) |
| 1201 | ctl |= BMCR_SPEED100; |
| 1202 | |
| 1203 | if (DUPLEX_FULL == phydev->duplex) |
| 1204 | ctl |= BMCR_FULLDPLX; |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 1205 | |
Sergei Shtylyov | e62a768 | 2014-01-05 03:21:52 +0300 | [diff] [blame] | 1206 | return phy_write(phydev, MII_BMCR, ctl); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1207 | } |
Madalin Bucur | 3fb69bc | 2013-11-20 16:38:19 -0600 | [diff] [blame] | 1208 | EXPORT_SYMBOL(genphy_setup_forced); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1209 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1210 | /** |
| 1211 | * genphy_restart_aneg - Enable and Restart Autonegotiation |
| 1212 | * @phydev: target phy_device struct |
| 1213 | */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1214 | int genphy_restart_aneg(struct phy_device *phydev) |
| 1215 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 1216 | int ctl = phy_read(phydev, MII_BMCR); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1217 | |
| 1218 | if (ctl < 0) |
| 1219 | return ctl; |
| 1220 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1221 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1222 | |
| 1223 | /* Don't isolate the PHY if we're negotiating */ |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1224 | ctl &= ~BMCR_ISOLATE; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1225 | |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 1226 | return phy_write(phydev, MII_BMCR, ctl); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1227 | } |
Adrian Bunk | 892871d | 2008-10-13 18:48:09 -0700 | [diff] [blame] | 1228 | EXPORT_SYMBOL(genphy_restart_aneg); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1229 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1230 | /** |
| 1231 | * genphy_config_aneg - restart auto-negotiation or write BMCR |
| 1232 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1233 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1234 | * Description: If auto-negotiation is enabled, we configure the |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1235 | * advertising, and then restart auto-negotiation. If it is not |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1236 | * enabled, then we write the BMCR. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1237 | */ |
| 1238 | int genphy_config_aneg(struct phy_device *phydev) |
| 1239 | { |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1240 | int err, changed; |
| 1241 | |
| 1242 | changed = genphy_config_eee_advert(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1243 | |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 1244 | if (AUTONEG_ENABLE != phydev->autoneg) |
| 1245 | return genphy_setup_forced(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1246 | |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1247 | err = genphy_config_advert(phydev); |
| 1248 | if (err < 0) /* error */ |
| 1249 | return err; |
| 1250 | |
| 1251 | changed |= err; |
| 1252 | |
| 1253 | if (changed == 0) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1254 | /* Advertisement hasn't changed, but maybe aneg was never on to |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1255 | * begin with? Or maybe phy was isolated? |
| 1256 | */ |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 1257 | int ctl = phy_read(phydev, MII_BMCR); |
| 1258 | |
| 1259 | if (ctl < 0) |
| 1260 | return ctl; |
| 1261 | |
| 1262 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1263 | changed = 1; /* do restart aneg */ |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | /* Only restart aneg if we are advertising something different |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1267 | * than we were before. |
| 1268 | */ |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1269 | if (changed > 0) |
| 1270 | return genphy_restart_aneg(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1271 | |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1272 | return 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1273 | } |
| 1274 | EXPORT_SYMBOL(genphy_config_aneg); |
| 1275 | |
Florian Fainelli | a9fa6e6 | 2014-02-11 17:27:36 -0800 | [diff] [blame] | 1276 | /** |
| 1277 | * genphy_aneg_done - return auto-negotiation status |
| 1278 | * @phydev: target phy_device struct |
| 1279 | * |
| 1280 | * Description: Reads the status register and returns 0 either if |
| 1281 | * auto-negotiation is incomplete, or if there was an error. |
| 1282 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. |
| 1283 | */ |
| 1284 | int genphy_aneg_done(struct phy_device *phydev) |
| 1285 | { |
| 1286 | int retval = phy_read(phydev, MII_BMSR); |
| 1287 | |
| 1288 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); |
| 1289 | } |
| 1290 | EXPORT_SYMBOL(genphy_aneg_done); |
| 1291 | |
stephen hemminger | 395056e | 2014-01-19 11:48:20 -0800 | [diff] [blame] | 1292 | static int gen10g_config_aneg(struct phy_device *phydev) |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1293 | { |
| 1294 | return 0; |
| 1295 | } |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1296 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1297 | /** |
| 1298 | * genphy_update_link - update link status in @phydev |
| 1299 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1300 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1301 | * Description: Update the value in phydev->link to reflect the |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1302 | * current link value. In order to do this, we need to read |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1303 | * the status register twice, keeping the second value. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1304 | */ |
| 1305 | int genphy_update_link(struct phy_device *phydev) |
| 1306 | { |
| 1307 | int status; |
| 1308 | |
| 1309 | /* Do a fake read */ |
| 1310 | status = phy_read(phydev, MII_BMSR); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1311 | if (status < 0) |
| 1312 | return status; |
| 1313 | |
| 1314 | /* Read link and autonegotiation status */ |
| 1315 | status = phy_read(phydev, MII_BMSR); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1316 | if (status < 0) |
| 1317 | return status; |
| 1318 | |
| 1319 | if ((status & BMSR_LSTATUS) == 0) |
| 1320 | phydev->link = 0; |
| 1321 | else |
| 1322 | phydev->link = 1; |
| 1323 | |
| 1324 | return 0; |
| 1325 | } |
Andy Fleming | 6b65552 | 2006-10-16 16:19:17 -0500 | [diff] [blame] | 1326 | EXPORT_SYMBOL(genphy_update_link); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1327 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1328 | /** |
| 1329 | * genphy_read_status - check the link status and update current link state |
| 1330 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1331 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1332 | * Description: Check the link, then figure out the current state |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1333 | * by comparing what we advertise with what the link partner |
| 1334 | * advertises. Start by checking the gigabit possibilities, |
| 1335 | * then move on to 10/100. |
| 1336 | */ |
| 1337 | int genphy_read_status(struct phy_device *phydev) |
| 1338 | { |
| 1339 | int adv; |
| 1340 | int err; |
| 1341 | int lpa; |
| 1342 | int lpagb = 0; |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1343 | int common_adv; |
| 1344 | int common_adv_gb = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1345 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1346 | /* Update the link, but return if there was an error */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1347 | err = genphy_update_link(phydev); |
| 1348 | if (err) |
| 1349 | return err; |
| 1350 | |
Florian Fainelli | 114002b | 2013-12-06 13:01:30 -0800 | [diff] [blame] | 1351 | phydev->lp_advertising = 0; |
| 1352 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1353 | if (AUTONEG_ENABLE == phydev->autoneg) { |
| 1354 | if (phydev->supported & (SUPPORTED_1000baseT_Half |
| 1355 | | SUPPORTED_1000baseT_Full)) { |
| 1356 | lpagb = phy_read(phydev, MII_STAT1000); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1357 | if (lpagb < 0) |
| 1358 | return lpagb; |
| 1359 | |
| 1360 | adv = phy_read(phydev, MII_CTRL1000); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1361 | if (adv < 0) |
| 1362 | return adv; |
| 1363 | |
Florian Fainelli | 114002b | 2013-12-06 13:01:30 -0800 | [diff] [blame] | 1364 | phydev->lp_advertising = |
| 1365 | mii_stat1000_to_ethtool_lpa_t(lpagb); |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1366 | common_adv_gb = lpagb & adv << 2; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1367 | } |
| 1368 | |
| 1369 | lpa = phy_read(phydev, MII_LPA); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1370 | if (lpa < 0) |
| 1371 | return lpa; |
| 1372 | |
Florian Fainelli | 114002b | 2013-12-06 13:01:30 -0800 | [diff] [blame] | 1373 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
| 1374 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1375 | adv = phy_read(phydev, MII_ADVERTISE); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1376 | if (adv < 0) |
| 1377 | return adv; |
| 1378 | |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1379 | common_adv = lpa & adv; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1380 | |
| 1381 | phydev->speed = SPEED_10; |
| 1382 | phydev->duplex = DUPLEX_HALF; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1383 | phydev->pause = 0; |
| 1384 | phydev->asym_pause = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1385 | |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1386 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1387 | phydev->speed = SPEED_1000; |
| 1388 | |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1389 | if (common_adv_gb & LPA_1000FULL) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1390 | phydev->duplex = DUPLEX_FULL; |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1391 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1392 | phydev->speed = SPEED_100; |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 1393 | |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1394 | if (common_adv & LPA_100FULL) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1395 | phydev->duplex = DUPLEX_FULL; |
| 1396 | } else |
Cristian Bercaru | a4572e0 | 2014-02-25 10:22:48 +0200 | [diff] [blame] | 1397 | if (common_adv & LPA_10FULL) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1398 | phydev->duplex = DUPLEX_FULL; |
| 1399 | |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 1400 | if (phydev->duplex == DUPLEX_FULL) { |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1401 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
| 1402 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; |
| 1403 | } |
| 1404 | } else { |
| 1405 | int bmcr = phy_read(phydev, MII_BMCR); |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1406 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1407 | if (bmcr < 0) |
| 1408 | return bmcr; |
| 1409 | |
| 1410 | if (bmcr & BMCR_FULLDPLX) |
| 1411 | phydev->duplex = DUPLEX_FULL; |
| 1412 | else |
| 1413 | phydev->duplex = DUPLEX_HALF; |
| 1414 | |
| 1415 | if (bmcr & BMCR_SPEED1000) |
| 1416 | phydev->speed = SPEED_1000; |
| 1417 | else if (bmcr & BMCR_SPEED100) |
| 1418 | phydev->speed = SPEED_100; |
| 1419 | else |
| 1420 | phydev->speed = SPEED_10; |
| 1421 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1422 | phydev->pause = 0; |
| 1423 | phydev->asym_pause = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1424 | } |
| 1425 | |
| 1426 | return 0; |
| 1427 | } |
| 1428 | EXPORT_SYMBOL(genphy_read_status); |
| 1429 | |
stephen hemminger | 395056e | 2014-01-19 11:48:20 -0800 | [diff] [blame] | 1430 | static int gen10g_read_status(struct phy_device *phydev) |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1431 | { |
| 1432 | int devad, reg; |
| 1433 | u32 mmd_mask = phydev->c45_ids.devices_in_package; |
| 1434 | |
| 1435 | phydev->link = 1; |
| 1436 | |
| 1437 | /* For now just lie and say it's 10G all the time */ |
| 1438 | phydev->speed = SPEED_10000; |
| 1439 | phydev->duplex = DUPLEX_FULL; |
| 1440 | |
| 1441 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { |
| 1442 | if (!(mmd_mask & 1)) |
| 1443 | continue; |
| 1444 | |
| 1445 | /* Read twice because link state is latched and a |
| 1446 | * read moves the current state into the register |
| 1447 | */ |
| 1448 | phy_read_mmd(phydev, devad, MDIO_STAT1); |
| 1449 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); |
| 1450 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) |
| 1451 | phydev->link = 0; |
| 1452 | } |
| 1453 | |
| 1454 | return 0; |
| 1455 | } |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1456 | |
Florian Fainelli | 797ac07 | 2014-02-17 13:34:02 -0800 | [diff] [blame] | 1457 | /** |
| 1458 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit |
| 1459 | * @phydev: target phy_device struct |
| 1460 | * |
| 1461 | * Description: Perform a software PHY reset using the standard |
| 1462 | * BMCR_RESET bit and poll for the reset bit to be cleared. |
| 1463 | * |
| 1464 | * Returns: 0 on success, < 0 on failure |
| 1465 | */ |
| 1466 | int genphy_soft_reset(struct phy_device *phydev) |
| 1467 | { |
| 1468 | int ret; |
| 1469 | |
| 1470 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); |
| 1471 | if (ret < 0) |
| 1472 | return ret; |
| 1473 | |
| 1474 | return phy_poll_reset(phydev); |
| 1475 | } |
| 1476 | EXPORT_SYMBOL(genphy_soft_reset); |
| 1477 | |
Daniel Mack | af6b696 | 2014-04-16 17:19:12 +0200 | [diff] [blame] | 1478 | int genphy_config_init(struct phy_device *phydev) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1479 | { |
Eric Sesterhenn | 84c22d7 | 2006-09-25 16:39:22 -0700 | [diff] [blame] | 1480 | int val; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1481 | u32 features; |
| 1482 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1483 | features = (SUPPORTED_TP | SUPPORTED_MII |
| 1484 | | SUPPORTED_AUI | SUPPORTED_FIBRE | |
Woojung.Huh@microchip.com | cd772de | 2016-02-11 17:29:47 +0000 | [diff] [blame] | 1485 | SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1486 | |
| 1487 | /* Do we support autonegotiation? */ |
| 1488 | val = phy_read(phydev, MII_BMSR); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1489 | if (val < 0) |
| 1490 | return val; |
| 1491 | |
| 1492 | if (val & BMSR_ANEGCAPABLE) |
| 1493 | features |= SUPPORTED_Autoneg; |
| 1494 | |
| 1495 | if (val & BMSR_100FULL) |
| 1496 | features |= SUPPORTED_100baseT_Full; |
| 1497 | if (val & BMSR_100HALF) |
| 1498 | features |= SUPPORTED_100baseT_Half; |
| 1499 | if (val & BMSR_10FULL) |
| 1500 | features |= SUPPORTED_10baseT_Full; |
| 1501 | if (val & BMSR_10HALF) |
| 1502 | features |= SUPPORTED_10baseT_Half; |
| 1503 | |
| 1504 | if (val & BMSR_ESTATEN) { |
| 1505 | val = phy_read(phydev, MII_ESTATUS); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1506 | if (val < 0) |
| 1507 | return val; |
| 1508 | |
| 1509 | if (val & ESTATUS_1000_TFULL) |
| 1510 | features |= SUPPORTED_1000baseT_Full; |
| 1511 | if (val & ESTATUS_1000_THALF) |
| 1512 | features |= SUPPORTED_1000baseT_Half; |
| 1513 | } |
| 1514 | |
Sascha Hauer | c242a47 | 2014-05-21 15:29:44 +0200 | [diff] [blame] | 1515 | phydev->supported &= features; |
| 1516 | phydev->advertising &= features; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1517 | |
| 1518 | return 0; |
| 1519 | } |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1520 | |
Florian Fainelli | 9df81dd | 2014-02-17 13:34:03 -0800 | [diff] [blame] | 1521 | static int gen10g_soft_reset(struct phy_device *phydev) |
| 1522 | { |
| 1523 | /* Do nothing for now */ |
| 1524 | return 0; |
| 1525 | } |
Daniel Mack | af6b696 | 2014-04-16 17:19:12 +0200 | [diff] [blame] | 1526 | EXPORT_SYMBOL(genphy_config_init); |
Florian Fainelli | 9df81dd | 2014-02-17 13:34:03 -0800 | [diff] [blame] | 1527 | |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1528 | static int gen10g_config_init(struct phy_device *phydev) |
| 1529 | { |
| 1530 | /* Temporarily just say we support everything */ |
| 1531 | phydev->supported = SUPPORTED_10000baseT_Full; |
| 1532 | phydev->advertising = SUPPORTED_10000baseT_Full; |
| 1533 | |
| 1534 | return 0; |
| 1535 | } |
| 1536 | |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1537 | int genphy_suspend(struct phy_device *phydev) |
| 1538 | { |
| 1539 | int value; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1540 | |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1541 | mutex_lock(&phydev->lock); |
| 1542 | |
| 1543 | value = phy_read(phydev, MII_BMCR); |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1544 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1545 | |
| 1546 | mutex_unlock(&phydev->lock); |
| 1547 | |
| 1548 | return 0; |
| 1549 | } |
| 1550 | EXPORT_SYMBOL(genphy_suspend); |
| 1551 | |
stephen hemminger | 395056e | 2014-01-19 11:48:20 -0800 | [diff] [blame] | 1552 | static int gen10g_suspend(struct phy_device *phydev) |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1553 | { |
| 1554 | return 0; |
| 1555 | } |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1556 | |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1557 | int genphy_resume(struct phy_device *phydev) |
| 1558 | { |
| 1559 | int value; |
| 1560 | |
| 1561 | mutex_lock(&phydev->lock); |
| 1562 | |
| 1563 | value = phy_read(phydev, MII_BMCR); |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1564 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1565 | |
| 1566 | mutex_unlock(&phydev->lock); |
| 1567 | |
| 1568 | return 0; |
| 1569 | } |
| 1570 | EXPORT_SYMBOL(genphy_resume); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1571 | |
stephen hemminger | 395056e | 2014-01-19 11:48:20 -0800 | [diff] [blame] | 1572 | static int gen10g_resume(struct phy_device *phydev) |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1573 | { |
| 1574 | return 0; |
| 1575 | } |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1576 | |
Simon Horman | f3a6bd3 | 2015-09-30 15:15:52 +0900 | [diff] [blame] | 1577 | static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) |
| 1578 | { |
Simon Horman | f3a6bd3 | 2015-09-30 15:15:52 +0900 | [diff] [blame] | 1579 | switch (max_speed) { |
Heiner Kallweit | 4f384d9 | 2018-12-03 08:19:33 +0100 | [diff] [blame] | 1580 | case SPEED_10: |
| 1581 | phydev->supported &= ~PHY_100BT_FEATURES; |
Simon Horman | f3a6bd3 | 2015-09-30 15:15:52 +0900 | [diff] [blame] | 1582 | /* fall through */ |
| 1583 | case SPEED_100: |
Heiner Kallweit | 4f384d9 | 2018-12-03 08:19:33 +0100 | [diff] [blame] | 1584 | phydev->supported &= ~PHY_1000BT_FEATURES; |
| 1585 | break; |
| 1586 | case SPEED_1000: |
| 1587 | break; |
| 1588 | default: |
| 1589 | return -ENOTSUPP; |
Simon Horman | f3a6bd3 | 2015-09-30 15:15:52 +0900 | [diff] [blame] | 1590 | } |
| 1591 | |
| 1592 | return 0; |
| 1593 | } |
| 1594 | |
| 1595 | int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) |
| 1596 | { |
| 1597 | int err; |
| 1598 | |
| 1599 | err = __set_phy_supported(phydev, max_speed); |
| 1600 | if (err) |
| 1601 | return err; |
| 1602 | |
| 1603 | phydev->advertising = phydev->supported; |
| 1604 | |
| 1605 | return 0; |
| 1606 | } |
| 1607 | EXPORT_SYMBOL(phy_set_max_speed); |
| 1608 | |
Sascha Hauer | de906af | 2014-05-21 15:29:45 +0200 | [diff] [blame] | 1609 | static void of_set_phy_supported(struct phy_device *phydev) |
| 1610 | { |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1611 | struct device_node *node = phydev->mdio.dev.of_node; |
Sascha Hauer | de906af | 2014-05-21 15:29:45 +0200 | [diff] [blame] | 1612 | u32 max_speed; |
| 1613 | |
| 1614 | if (!IS_ENABLED(CONFIG_OF_MDIO)) |
| 1615 | return; |
| 1616 | |
| 1617 | if (!node) |
| 1618 | return; |
| 1619 | |
Simon Horman | f3a6bd3 | 2015-09-30 15:15:52 +0900 | [diff] [blame] | 1620 | if (!of_property_read_u32(node, "max-speed", &max_speed)) |
| 1621 | __set_phy_supported(phydev, max_speed); |
Sascha Hauer | de906af | 2014-05-21 15:29:45 +0200 | [diff] [blame] | 1622 | } |
| 1623 | |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1624 | static void of_set_phy_eee_broken(struct phy_device *phydev) |
| 1625 | { |
| 1626 | struct device_node *node = phydev->mdio.dev.of_node; |
jbrunet | 3897ae1 | 2016-12-19 16:05:37 +0100 | [diff] [blame] | 1627 | u32 broken = 0; |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1628 | |
| 1629 | if (!IS_ENABLED(CONFIG_OF_MDIO)) |
| 1630 | return; |
| 1631 | |
| 1632 | if (!node) |
| 1633 | return; |
| 1634 | |
jbrunet | 3897ae1 | 2016-12-19 16:05:37 +0100 | [diff] [blame] | 1635 | if (of_property_read_bool(node, "eee-broken-100tx")) |
| 1636 | broken |= MDIO_EEE_100TX; |
| 1637 | if (of_property_read_bool(node, "eee-broken-1000t")) |
| 1638 | broken |= MDIO_EEE_1000T; |
| 1639 | if (of_property_read_bool(node, "eee-broken-10gt")) |
| 1640 | broken |= MDIO_EEE_10GT; |
| 1641 | if (of_property_read_bool(node, "eee-broken-1000kx")) |
| 1642 | broken |= MDIO_EEE_1000KX; |
| 1643 | if (of_property_read_bool(node, "eee-broken-10gkx4")) |
| 1644 | broken |= MDIO_EEE_10GKX4; |
| 1645 | if (of_property_read_bool(node, "eee-broken-10gkr")) |
| 1646 | broken |= MDIO_EEE_10GKR; |
| 1647 | |
| 1648 | phydev->eee_broken_modes = broken; |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1649 | } |
| 1650 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1651 | /** |
| 1652 | * phy_probe - probe and init a PHY device |
| 1653 | * @dev: device to probe and init |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1654 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1655 | * Description: Take care of setting up the phy_device structure, |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1656 | * set the state to READY (the driver's init function should |
| 1657 | * set it to STARTING if needed). |
| 1658 | */ |
| 1659 | static int phy_probe(struct device *dev) |
| 1660 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 1661 | struct phy_device *phydev = to_phy_device(dev); |
Andrew Lunn | e5a03bf | 2016-01-06 20:11:16 +0100 | [diff] [blame] | 1662 | struct device_driver *drv = phydev->mdio.dev.driver; |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 1663 | struct phy_driver *phydrv = to_phy_driver(drv); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1664 | int err = 0; |
| 1665 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1666 | phydev->drv = phydrv; |
| 1667 | |
Florian Fainelli | 2c7b492 | 2013-05-19 22:53:42 +0000 | [diff] [blame] | 1668 | /* Disable the interrupt if the PHY doesn't support it |
| 1669 | * but the interrupt is still a valid one |
| 1670 | */ |
| 1671 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1672 | phy_interrupt_is_valid(phydev)) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1673 | phydev->irq = PHY_POLL; |
| 1674 | |
Florian Fainelli | 4284b6a | 2013-05-23 01:11:12 +0000 | [diff] [blame] | 1675 | if (phydrv->flags & PHY_IS_INTERNAL) |
| 1676 | phydev->is_internal = true; |
| 1677 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1678 | mutex_lock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1679 | |
| 1680 | /* Start out supporting everything. Eventually, |
| 1681 | * a controller will attach, and may modify one |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1682 | * or both of these values |
| 1683 | */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1684 | phydev->supported = phydrv->features; |
Sascha Hauer | de906af | 2014-05-21 15:29:45 +0200 | [diff] [blame] | 1685 | of_set_phy_supported(phydev); |
| 1686 | phydev->advertising = phydev->supported; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1687 | |
jbrunet | 97ace18 | 2016-11-28 10:46:46 +0100 | [diff] [blame] | 1688 | /* Get the EEE modes we want to prohibit. We will ask |
| 1689 | * the PHY stop advertising these mode later on |
| 1690 | */ |
| 1691 | of_set_phy_eee_broken(phydev); |
| 1692 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1693 | /* Set the state to READY by default */ |
| 1694 | phydev->state = PHY_READY; |
| 1695 | |
| 1696 | if (phydev->drv->probe) |
| 1697 | err = phydev->drv->probe(phydev); |
| 1698 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1699 | mutex_unlock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1700 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1701 | return err; |
| 1702 | } |
| 1703 | |
| 1704 | static int phy_remove(struct device *dev) |
| 1705 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame] | 1706 | struct phy_device *phydev = to_phy_device(dev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1707 | |
Florian Fainelli | c3c9471 | 2017-02-17 16:07:33 -0800 | [diff] [blame] | 1708 | cancel_delayed_work_sync(&phydev->state_queue); |
| 1709 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1710 | mutex_lock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1711 | phydev->state = PHY_DOWN; |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1712 | mutex_unlock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1713 | |
| 1714 | if (phydev->drv->remove) |
| 1715 | phydev->drv->remove(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1716 | phydev->drv = NULL; |
| 1717 | |
| 1718 | return 0; |
| 1719 | } |
| 1720 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1721 | /** |
| 1722 | * phy_driver_register - register a phy_driver with the PHY layer |
| 1723 | * @new_driver: new phy_driver to register |
Andrew Lunn | be01da7 | 2016-01-06 20:11:22 +0100 | [diff] [blame] | 1724 | * @owner: module owning this PHY |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1725 | */ |
Andrew Lunn | be01da7 | 2016-01-06 20:11:22 +0100 | [diff] [blame] | 1726 | int phy_driver_register(struct phy_driver *new_driver, struct module *owner) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1727 | { |
| 1728 | int retval; |
| 1729 | |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 1730 | new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; |
| 1731 | new_driver->mdiodrv.driver.name = new_driver->name; |
| 1732 | new_driver->mdiodrv.driver.bus = &mdio_bus_type; |
| 1733 | new_driver->mdiodrv.driver.probe = phy_probe; |
| 1734 | new_driver->mdiodrv.driver.remove = phy_remove; |
| 1735 | new_driver->mdiodrv.driver.owner = owner; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1736 | |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 1737 | retval = driver_register(&new_driver->mdiodrv.driver); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1738 | if (retval) { |
Joe Perches | 8d24248 | 2012-06-09 07:49:07 +0000 | [diff] [blame] | 1739 | pr_err("%s: Error %d in registering driver\n", |
| 1740 | new_driver->name, retval); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1741 | |
| 1742 | return retval; |
| 1743 | } |
| 1744 | |
Olof Johansson | f2511f1 | 2007-11-04 16:09:23 -0600 | [diff] [blame] | 1745 | pr_debug("%s: Registered new driver\n", new_driver->name); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1746 | |
| 1747 | return 0; |
| 1748 | } |
| 1749 | EXPORT_SYMBOL(phy_driver_register); |
| 1750 | |
Andrew Lunn | be01da7 | 2016-01-06 20:11:22 +0100 | [diff] [blame] | 1751 | int phy_drivers_register(struct phy_driver *new_driver, int n, |
| 1752 | struct module *owner) |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1753 | { |
| 1754 | int i, ret = 0; |
| 1755 | |
| 1756 | for (i = 0; i < n; i++) { |
Andrew Lunn | be01da7 | 2016-01-06 20:11:22 +0100 | [diff] [blame] | 1757 | ret = phy_driver_register(new_driver + i, owner); |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1758 | if (ret) { |
| 1759 | while (i-- > 0) |
| 1760 | phy_driver_unregister(new_driver + i); |
| 1761 | break; |
| 1762 | } |
| 1763 | } |
| 1764 | return ret; |
| 1765 | } |
| 1766 | EXPORT_SYMBOL(phy_drivers_register); |
| 1767 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1768 | void phy_driver_unregister(struct phy_driver *drv) |
| 1769 | { |
Andrew Lunn | a9049e0 | 2016-01-06 20:11:26 +0100 | [diff] [blame] | 1770 | driver_unregister(&drv->mdiodrv.driver); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1771 | } |
| 1772 | EXPORT_SYMBOL(phy_driver_unregister); |
| 1773 | |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1774 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
| 1775 | { |
| 1776 | int i; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1777 | |
| 1778 | for (i = 0; i < n; i++) |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1779 | phy_driver_unregister(drv + i); |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1780 | } |
| 1781 | EXPORT_SYMBOL(phy_drivers_unregister); |
| 1782 | |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 1783 | static struct phy_driver genphy_driver[] = { |
| 1784 | { |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1785 | .phy_id = 0xffffffff, |
| 1786 | .phy_id_mask = 0xffffffff, |
| 1787 | .name = "Generic PHY", |
Florian Fainelli | 6c78197 | 2017-03-05 12:34:49 -0800 | [diff] [blame] | 1788 | .soft_reset = genphy_no_soft_reset, |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1789 | .config_init = genphy_config_init, |
Sascha Hauer | c242a47 | 2014-05-21 15:29:44 +0200 | [diff] [blame] | 1790 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | |
| 1791 | SUPPORTED_AUI | SUPPORTED_FIBRE | |
| 1792 | SUPPORTED_BNC, |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1793 | .config_aneg = genphy_config_aneg, |
Florian Fainelli | 76a423a | 2014-02-11 17:27:37 -0800 | [diff] [blame] | 1794 | .aneg_done = genphy_aneg_done, |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1795 | .read_status = genphy_read_status, |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1796 | .suspend = genphy_suspend, |
| 1797 | .resume = genphy_resume, |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1798 | }, { |
| 1799 | .phy_id = 0xffffffff, |
| 1800 | .phy_id_mask = 0xffffffff, |
| 1801 | .name = "Generic 10G PHY", |
Florian Fainelli | 9df81dd | 2014-02-17 13:34:03 -0800 | [diff] [blame] | 1802 | .soft_reset = gen10g_soft_reset, |
Andy Fleming | 124059f | 2014-01-10 14:27:37 +0800 | [diff] [blame] | 1803 | .config_init = gen10g_config_init, |
| 1804 | .features = 0, |
| 1805 | .config_aneg = gen10g_config_aneg, |
| 1806 | .read_status = gen10g_read_status, |
| 1807 | .suspend = gen10g_suspend, |
| 1808 | .resume = gen10g_resume, |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 1809 | } }; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1810 | |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1811 | static int __init phy_init(void) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1812 | { |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1813 | int rc; |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1814 | |
| 1815 | rc = mdio_bus_init(); |
| 1816 | if (rc) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1817 | return rc; |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1818 | |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 1819 | rc = phy_drivers_register(genphy_driver, |
Andrew Lunn | be01da7 | 2016-01-06 20:11:22 +0100 | [diff] [blame] | 1820 | ARRAY_SIZE(genphy_driver), THIS_MODULE); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1821 | if (rc) |
| 1822 | mdio_bus_exit(); |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1823 | |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1824 | return rc; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1825 | } |
| 1826 | |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1827 | static void __exit phy_exit(void) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1828 | { |
Shaohui Xie | ab2145e | 2014-01-10 14:27:22 +0800 | [diff] [blame] | 1829 | phy_drivers_unregister(genphy_driver, |
| 1830 | ARRAY_SIZE(genphy_driver)); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1831 | mdio_bus_exit(); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1832 | } |
| 1833 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1834 | subsys_initcall(phy_init); |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1835 | module_exit(phy_exit); |