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> |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 33 | #include <linux/io.h> |
| 34 | #include <linux/uaccess.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 35 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 36 | #include <asm/irq.h> |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 37 | |
Olaf Hering | afcceaa | 2005-12-14 00:33:49 +0100 | [diff] [blame] | 38 | MODULE_DESCRIPTION("PHY library"); |
| 39 | MODULE_AUTHOR("Andy Fleming"); |
| 40 | MODULE_LICENSE("GPL"); |
| 41 | |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 42 | void phy_device_free(struct phy_device *phydev) |
| 43 | { |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 44 | put_device(&phydev->dev); |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 45 | } |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 46 | EXPORT_SYMBOL(phy_device_free); |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 47 | |
| 48 | static void phy_device_release(struct device *dev) |
| 49 | { |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 50 | kfree(to_phy_device(dev)); |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 51 | } |
| 52 | |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 53 | static struct phy_driver genphy_driver; |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 54 | |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 55 | static LIST_HEAD(phy_fixup_list); |
| 56 | static DEFINE_MUTEX(phy_fixup_lock); |
| 57 | |
stephen hemminger | 89ff05e | 2010-10-21 08:37:41 +0000 | [diff] [blame] | 58 | static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
| 59 | u32 flags, phy_interface_t interface); |
| 60 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 61 | /** |
| 62 | * phy_register_fixup - creates a new phy_fixup and adds it to the list |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 63 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) |
| 64 | * @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] | 65 | * It can also be PHY_ANY_UID |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 66 | * @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] | 67 | * comparison |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 68 | * @run: The actual code to be run when a matching PHY is found |
| 69 | */ |
| 70 | 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] | 71 | int (*run)(struct phy_device *)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 72 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame^] | 73 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 74 | |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 75 | if (!fixup) |
| 76 | return -ENOMEM; |
| 77 | |
Kay Sievers | fb28ad3 | 2008-11-10 13:55:14 -0800 | [diff] [blame] | 78 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 79 | fixup->phy_uid = phy_uid; |
| 80 | fixup->phy_uid_mask = phy_uid_mask; |
| 81 | fixup->run = run; |
| 82 | |
| 83 | mutex_lock(&phy_fixup_lock); |
| 84 | list_add_tail(&fixup->list, &phy_fixup_list); |
| 85 | mutex_unlock(&phy_fixup_lock); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | EXPORT_SYMBOL(phy_register_fixup); |
| 90 | |
| 91 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ |
| 92 | 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] | 93 | int (*run)(struct phy_device *)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 94 | { |
| 95 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); |
| 96 | } |
| 97 | EXPORT_SYMBOL(phy_register_fixup_for_uid); |
| 98 | |
| 99 | /* Registers a fixup to be run on the PHY with id string bus_id */ |
| 100 | int phy_register_fixup_for_id(const char *bus_id, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 101 | int (*run)(struct phy_device *)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 102 | { |
| 103 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); |
| 104 | } |
| 105 | EXPORT_SYMBOL(phy_register_fixup_for_id); |
| 106 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 107 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 108 | * Fixups can be set to match any in one or more fields. |
| 109 | */ |
| 110 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) |
| 111 | { |
Kay Sievers | fb28ad3 | 2008-11-10 13:55:14 -0800 | [diff] [blame] | 112 | if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 113 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
| 114 | return 0; |
| 115 | |
| 116 | if ((fixup->phy_uid & fixup->phy_uid_mask) != |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 117 | (phydev->phy_id & fixup->phy_uid_mask)) |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 118 | if (fixup->phy_uid != PHY_ANY_UID) |
| 119 | return 0; |
| 120 | |
| 121 | return 1; |
| 122 | } |
| 123 | |
| 124 | /* Runs any matching fixups for this phydev */ |
| 125 | int phy_scan_fixups(struct phy_device *phydev) |
| 126 | { |
| 127 | struct phy_fixup *fixup; |
| 128 | |
| 129 | mutex_lock(&phy_fixup_lock); |
| 130 | list_for_each_entry(fixup, &phy_fixup_list, list) { |
| 131 | if (phy_needs_fixup(phydev, fixup)) { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame^] | 132 | int err = fixup->run(phydev); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 133 | |
Jiri Slaby | bc23283 | 2009-07-13 11:23:39 +0000 | [diff] [blame] | 134 | if (err < 0) { |
| 135 | mutex_unlock(&phy_fixup_lock); |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 136 | return err; |
Jiri Slaby | bc23283 | 2009-07-13 11:23:39 +0000 | [diff] [blame] | 137 | } |
Andy Fleming | f62220d | 2008-04-18 17:29:54 -0500 | [diff] [blame] | 138 | } |
| 139 | } |
| 140 | mutex_unlock(&phy_fixup_lock); |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | EXPORT_SYMBOL(phy_scan_fixups); |
| 145 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 146 | 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] | 147 | bool is_c45, |
| 148 | struct phy_c45_device_ids *c45_ids) |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 149 | { |
| 150 | struct phy_device *dev; |
David Woodhouse | 8626d3b | 2010-04-02 01:05:27 +0000 | [diff] [blame] | 151 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 152 | /* We allocate the device, and initialize the default values */ |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 153 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 154 | |
| 155 | if (NULL == dev) |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 156 | return (struct phy_device *)PTR_ERR((void *)-ENOMEM); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 157 | |
Anton Vorontsov | 6f4a7f4 | 2007-12-04 16:17:33 +0300 | [diff] [blame] | 158 | dev->dev.release = phy_device_release; |
| 159 | |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 160 | dev->speed = 0; |
| 161 | dev->duplex = -1; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 162 | dev->pause = 0; |
| 163 | dev->asym_pause = 0; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 164 | dev->link = 1; |
Andy Fleming | e8a2b6a | 2006-12-01 12:01:06 -0600 | [diff] [blame] | 165 | dev->interface = PHY_INTERFACE_MODE_GMII; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 166 | |
| 167 | dev->autoneg = AUTONEG_ENABLE; |
| 168 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 169 | dev->is_c45 = is_c45; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 170 | dev->addr = addr; |
| 171 | dev->phy_id = phy_id; |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 172 | if (c45_ids) |
| 173 | dev->c45_ids = *c45_ids; |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 174 | dev->bus = bus; |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 175 | dev->dev.parent = bus->parent; |
| 176 | dev->dev.bus = &mdio_bus_type; |
| 177 | dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; |
| 178 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 179 | |
| 180 | dev->state = PHY_DOWN; |
| 181 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 182 | mutex_init(&dev->lock); |
Anton Vorontsov | 4f9c85a | 2010-01-18 05:37:16 +0000 | [diff] [blame] | 183 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
Florian Fainelli | 5ea94e7 | 2013-05-19 22:53:43 +0000 | [diff] [blame] | 184 | INIT_WORK(&dev->phy_queue, phy_change); |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 185 | |
David Woodhouse | 8626d3b | 2010-04-02 01:05:27 +0000 | [diff] [blame] | 186 | /* Request the appropriate module unconditionally; don't |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 187 | * bother trying to do so only if it isn't already loaded, |
| 188 | * because that gets complicated. A hotplug event would have |
| 189 | * done an unconditional modprobe anyway. |
| 190 | * We don't do normal hotplug because it won't work for MDIO |
| 191 | * -- because it relies on the device staying around for long |
| 192 | * enough for the driver to get loaded. With MDIO, the NIC |
| 193 | * driver will get bored and give up as soon as it finds that |
| 194 | * there's no driver _already_ loaded. |
| 195 | */ |
David Woodhouse | 8626d3b | 2010-04-02 01:05:27 +0000 | [diff] [blame] | 196 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
| 197 | |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 198 | device_initialize(&dev->dev); |
| 199 | |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 200 | return dev; |
| 201 | } |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 202 | EXPORT_SYMBOL(phy_device_create); |
| 203 | |
| 204 | /** |
| 205 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. |
| 206 | * @bus: the target MII bus |
| 207 | * @addr: PHY address on the MII bus |
| 208 | * @phy_id: where to store the ID retrieved. |
| 209 | * @c45_ids: where to store the c45 ID information. |
| 210 | * |
| 211 | * If the PHY devices-in-package appears to be valid, it and the |
| 212 | * corresponding identifiers are stored in @c45_ids, zero is stored |
| 213 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns |
| 214 | * zero on success. |
| 215 | * |
| 216 | */ |
| 217 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, |
| 218 | struct phy_c45_device_ids *c45_ids) { |
| 219 | int phy_reg; |
| 220 | int i, reg_addr; |
| 221 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); |
| 222 | |
| 223 | /* Find first non-zero Devices In package. Device |
| 224 | * zero is reserved, so don't probe it. |
| 225 | */ |
| 226 | for (i = 1; |
| 227 | i < num_ids && c45_ids->devices_in_package == 0; |
| 228 | i++) { |
| 229 | reg_addr = MII_ADDR_C45 | i << 16 | 6; |
| 230 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 231 | if (phy_reg < 0) |
| 232 | return -EIO; |
| 233 | c45_ids->devices_in_package = (phy_reg & 0xffff) << 16; |
| 234 | |
| 235 | reg_addr = MII_ADDR_C45 | i << 16 | 5; |
| 236 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 237 | if (phy_reg < 0) |
| 238 | return -EIO; |
| 239 | c45_ids->devices_in_package |= (phy_reg & 0xffff); |
| 240 | |
| 241 | /* If mostly Fs, there is no device there, |
| 242 | * let's get out of here. |
| 243 | */ |
| 244 | if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) { |
| 245 | *phy_id = 0xffffffff; |
| 246 | return 0; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | /* Now probe Device Identifiers for each device present. */ |
| 251 | for (i = 1; i < num_ids; i++) { |
| 252 | if (!(c45_ids->devices_in_package & (1 << i))) |
| 253 | continue; |
| 254 | |
| 255 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; |
| 256 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 257 | if (phy_reg < 0) |
| 258 | return -EIO; |
| 259 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; |
| 260 | |
| 261 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; |
| 262 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
| 263 | if (phy_reg < 0) |
| 264 | return -EIO; |
| 265 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); |
| 266 | } |
| 267 | *phy_id = 0; |
| 268 | return 0; |
| 269 | } |
Vitaly Bordug | 11b0bac | 2006-08-14 23:00:29 -0700 | [diff] [blame] | 270 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 271 | /** |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 272 | * get_phy_id - reads the specified addr for its ID. |
| 273 | * @bus: the target MII bus |
| 274 | * @addr: PHY address on the MII bus |
| 275 | * @phy_id: where to store the ID retrieved. |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 276 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
| 277 | * @c45_ids: where to store the c45 ID information. |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 278 | * |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 279 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers |
| 280 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns |
| 281 | * zero on success. |
| 282 | * |
| 283 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and |
| 284 | * its return value is in turn returned. |
| 285 | * |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 286 | */ |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 287 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
| 288 | bool is_c45, struct phy_c45_device_ids *c45_ids) |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 289 | { |
| 290 | int phy_reg; |
| 291 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 292 | if (is_c45) |
| 293 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); |
| 294 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 295 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
David Daney | 6fe3264 | 2011-09-30 11:51:22 +0000 | [diff] [blame] | 296 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 297 | |
| 298 | if (phy_reg < 0) |
| 299 | return -EIO; |
| 300 | |
| 301 | *phy_id = (phy_reg & 0xffff) << 16; |
| 302 | |
| 303 | /* Grab the bits from PHYIR2, and put them in the lower half */ |
David Daney | 6fe3264 | 2011-09-30 11:51:22 +0000 | [diff] [blame] | 304 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 305 | |
| 306 | if (phy_reg < 0) |
| 307 | return -EIO; |
| 308 | |
| 309 | *phy_id |= (phy_reg & 0xffff); |
| 310 | |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | /** |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 315 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
| 316 | * struct |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 317 | * @bus: the target MII bus |
| 318 | * @addr: PHY address on the MII bus |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 319 | * @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] | 320 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 321 | * Description: Reads the ID registers of the PHY at @addr on the |
| 322 | * @bus, then allocates and returns the phy_device to represent it. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 323 | */ |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 324 | 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] | 325 | { |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 326 | struct phy_c45_device_ids c45_ids = {0}; |
David S. Miller | 160c85f | 2012-06-27 21:28:14 -0700 | [diff] [blame] | 327 | u32 phy_id = 0; |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 328 | int r; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 329 | |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 330 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
Paul Gortmaker | cac1f3c | 2008-04-15 12:49:21 -0400 | [diff] [blame] | 331 | if (r) |
| 332 | return ERR_PTR(r); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 333 | |
Giuseppe Cavallaro | 6436cbc | 2008-11-20 20:43:18 -0800 | [diff] [blame] | 334 | /* If the phy_id is mostly Fs, there is no device there */ |
| 335 | if ((phy_id & 0x1fffffff) == 0x1fffffff) |
| 336 | return NULL; |
| 337 | |
Sergei Shtylyov | e62a768 | 2014-01-05 03:21:52 +0300 | [diff] [blame] | 338 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 339 | } |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 340 | EXPORT_SYMBOL(get_phy_device); |
| 341 | |
| 342 | /** |
| 343 | * phy_device_register - Register the phy device on the MDIO bus |
Randy Dunlap | 1d4ac5d | 2009-06-16 16:56:33 +0000 | [diff] [blame] | 344 | * @phydev: phy_device structure to be added to the MDIO bus |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 345 | */ |
| 346 | int phy_device_register(struct phy_device *phydev) |
| 347 | { |
| 348 | int err; |
| 349 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 350 | /* Don't register a phy if one is already registered at this address */ |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 351 | if (phydev->bus->phy_map[phydev->addr]) |
| 352 | return -EINVAL; |
| 353 | phydev->bus->phy_map[phydev->addr] = phydev; |
| 354 | |
| 355 | /* Run all of the fixups for this PHY */ |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 356 | err = phy_init_hw(phydev); |
| 357 | if (err) { |
| 358 | pr_err("PHY %d failed to initialize\n", phydev->addr); |
| 359 | goto out; |
| 360 | } |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 361 | |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 362 | err = device_add(&phydev->dev); |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 363 | if (err) { |
Petr Malat | b2a4319 | 2013-02-28 01:01:52 +0000 | [diff] [blame] | 364 | pr_err("PHY %d failed to add\n", phydev->addr); |
Grant Likely | 4dea547 | 2009-04-25 12:52:46 +0000 | [diff] [blame] | 365 | goto out; |
| 366 | } |
| 367 | |
| 368 | return 0; |
| 369 | |
| 370 | out: |
| 371 | phydev->bus->phy_map[phydev->addr] = NULL; |
| 372 | return err; |
| 373 | } |
| 374 | EXPORT_SYMBOL(phy_device_register); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 375 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 376 | /** |
Jiri Pirko | f8f76db | 2010-02-04 10:23:02 -0800 | [diff] [blame] | 377 | * phy_find_first - finds the first PHY device on the bus |
| 378 | * @bus: the target MII bus |
| 379 | */ |
| 380 | struct phy_device *phy_find_first(struct mii_bus *bus) |
| 381 | { |
| 382 | int addr; |
| 383 | |
| 384 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { |
| 385 | if (bus->phy_map[addr]) |
| 386 | return bus->phy_map[addr]; |
| 387 | } |
| 388 | return NULL; |
| 389 | } |
| 390 | EXPORT_SYMBOL(phy_find_first); |
| 391 | |
| 392 | /** |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 393 | * phy_prepare_link - prepares the PHY layer to monitor link status |
| 394 | * @phydev: target phy_device struct |
| 395 | * @handler: callback function for link status change notifications |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 396 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 397 | * Description: Tells the PHY infrastructure to handle the |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 398 | * gory details on monitoring link status (whether through |
| 399 | * polling or an interrupt), and to call back to the |
| 400 | * connected device driver when the link status changes. |
| 401 | * If you want to monitor your own link state, don't call |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 402 | * this function. |
| 403 | */ |
stephen hemminger | 89ff05e | 2010-10-21 08:37:41 +0000 | [diff] [blame] | 404 | static void phy_prepare_link(struct phy_device *phydev, |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 405 | void (*handler)(struct net_device *)) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 406 | { |
| 407 | phydev->adjust_link = handler; |
| 408 | } |
| 409 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 410 | /** |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 411 | * phy_connect_direct - connect an ethernet device to a specific phy_device |
| 412 | * @dev: the network device to connect |
| 413 | * @phydev: the pointer to the phy device |
| 414 | * @handler: callback function for state change notifications |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 415 | * @interface: PHY device's interface |
| 416 | */ |
| 417 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 418 | void (*handler)(struct net_device *), |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 419 | phy_interface_t interface) |
| 420 | { |
| 421 | int rc; |
| 422 | |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 423 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 424 | if (rc) |
| 425 | return rc; |
| 426 | |
| 427 | phy_prepare_link(phydev, handler); |
| 428 | phy_start_machine(phydev, NULL); |
| 429 | if (phydev->irq > 0) |
| 430 | phy_start_interrupts(phydev); |
| 431 | |
| 432 | return 0; |
| 433 | } |
| 434 | EXPORT_SYMBOL(phy_connect_direct); |
| 435 | |
| 436 | /** |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 437 | * phy_connect - connect an ethernet device to a PHY device |
| 438 | * @dev: the network device to connect |
Randy Dunlap | 5d12b13 | 2008-04-28 10:58:22 -0700 | [diff] [blame] | 439 | * @bus_id: the id string of the PHY device to connect |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 440 | * @handler: callback function for state change notifications |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 441 | * @interface: PHY device's interface |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 442 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 443 | * Description: Convenience function for connecting ethernet |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 444 | * devices to PHY devices. The default behavior is for |
| 445 | * the PHY infrastructure to handle everything, and only notify |
| 446 | * the connected driver when the link status changes. If you |
| 447 | * don't want, or can't use the provided functionality, you may |
| 448 | * choose to call only the subset of functions which provide |
| 449 | * the desired functionality. |
| 450 | */ |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 451 | 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] | 452 | void (*handler)(struct net_device *), |
| 453 | phy_interface_t interface) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 454 | { |
| 455 | struct phy_device *phydev; |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 456 | struct device *d; |
| 457 | int rc; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 458 | |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 459 | /* Search the list of PHY devices on the mdio bus for the |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 460 | * PHY with the requested name |
| 461 | */ |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 462 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
| 463 | if (!d) { |
| 464 | pr_err("PHY %s not found\n", bus_id); |
| 465 | return ERR_PTR(-ENODEV); |
| 466 | } |
| 467 | phydev = to_phy_device(d); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 468 | |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 469 | rc = phy_connect_direct(dev, phydev, handler, interface); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 470 | if (rc) |
| 471 | return ERR_PTR(rc); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 472 | |
| 473 | return phydev; |
| 474 | } |
| 475 | EXPORT_SYMBOL(phy_connect); |
| 476 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 477 | /** |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 478 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
| 479 | * device |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 480 | * @phydev: target phy_device struct |
| 481 | */ |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 482 | void phy_disconnect(struct phy_device *phydev) |
| 483 | { |
| 484 | if (phydev->irq > 0) |
| 485 | phy_stop_interrupts(phydev); |
| 486 | |
| 487 | phy_stop_machine(phydev); |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 488 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 489 | phydev->adjust_link = NULL; |
| 490 | |
| 491 | phy_detach(phydev); |
| 492 | } |
| 493 | EXPORT_SYMBOL(phy_disconnect); |
| 494 | |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 495 | /** |
| 496 | * phy_poll_reset - Safely wait until a PHY reset has properly completed |
| 497 | * @phydev: The PHY device to poll |
| 498 | * |
| 499 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as |
| 500 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR |
| 501 | * register must be polled until the BMCR_RESET bit clears. |
| 502 | * |
| 503 | * Furthermore, any attempts to write to PHY registers may have no effect |
| 504 | * or even generate MDIO bus errors until this is complete. |
| 505 | * |
| 506 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the |
| 507 | * standard and do not fully reset after the BMCR_RESET bit is set, and may |
| 508 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an |
| 509 | * effort to support such broken PHYs, this function is separate from the |
| 510 | * standard phy_init_hw() which will zero all the other bits in the BMCR |
| 511 | * and reapply all driver-specific and board-specific fixups. |
| 512 | */ |
| 513 | static int phy_poll_reset(struct phy_device *phydev) |
| 514 | { |
| 515 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ |
| 516 | unsigned int retries = 12; |
| 517 | int ret; |
| 518 | |
| 519 | do { |
| 520 | msleep(50); |
| 521 | ret = phy_read(phydev, MII_BMCR); |
| 522 | if (ret < 0) |
| 523 | return ret; |
| 524 | } while (ret & BMCR_RESET && --retries); |
| 525 | if (ret & BMCR_RESET) |
| 526 | return -ETIMEDOUT; |
| 527 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 528 | /* Some chips (smsc911x) may still need up to another 1ms after the |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 529 | * BMCR_RESET bit is cleared before they are usable. |
| 530 | */ |
| 531 | msleep(1); |
| 532 | return 0; |
| 533 | } |
| 534 | |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 535 | int phy_init_hw(struct phy_device *phydev) |
| 536 | { |
| 537 | int ret; |
| 538 | |
| 539 | if (!phydev->drv || !phydev->drv->config_init) |
| 540 | return 0; |
| 541 | |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 542 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); |
| 543 | if (ret < 0) |
| 544 | return ret; |
| 545 | |
| 546 | ret = phy_poll_reset(phydev); |
| 547 | if (ret < 0) |
| 548 | return ret; |
| 549 | |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 550 | ret = phy_scan_fixups(phydev); |
| 551 | if (ret < 0) |
| 552 | return ret; |
| 553 | |
| 554 | return phydev->drv->config_init(phydev); |
| 555 | } |
Florian Fainelli | 87aa9f9 | 2013-12-06 13:01:34 -0800 | [diff] [blame] | 556 | EXPORT_SYMBOL(phy_init_hw); |
Anton Vorontsov | 2f5cb43 | 2009-12-30 08:23:30 +0000 | [diff] [blame] | 557 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 558 | /** |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 559 | * 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] | 560 | * @dev: network device to attach |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 561 | * @phydev: Pointer to phy_device to attach |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 562 | * @flags: PHY device's dev_flags |
| 563 | * @interface: PHY device's interface |
| 564 | * |
| 565 | * Description: Called by drivers to attach to a particular PHY |
| 566 | * device. The phy_device is found, and properly hooked up |
| 567 | * to the phy_driver. If no driver is attached, then the |
| 568 | * genphy_driver is used. The phy_device is given a ptr to |
| 569 | * the attaching device, and given a callback for link status |
| 570 | * change. The phy_device is returned to the attaching driver. |
| 571 | */ |
stephen hemminger | 89ff05e | 2010-10-21 08:37:41 +0000 | [diff] [blame] | 572 | static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
| 573 | u32 flags, phy_interface_t interface) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 574 | { |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 575 | struct device *d = &phydev->dev; |
Marc Kleine-Budde | d005a09 | 2011-03-28 14:54:08 +0000 | [diff] [blame] | 576 | int err; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 577 | |
| 578 | /* Assume that if there is no driver, that it doesn't |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 579 | * exist, and we should use the genphy driver. |
| 580 | */ |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 581 | if (NULL == d->driver) { |
David Daney | ac28b9f | 2012-06-27 07:33:35 +0000 | [diff] [blame] | 582 | if (phydev->is_c45) { |
| 583 | pr_err("No driver for phy %x\n", phydev->phy_id); |
| 584 | return -ENODEV; |
| 585 | } |
| 586 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 587 | d->driver = &genphy_driver.driver; |
| 588 | |
| 589 | err = d->driver->probe(d); |
Jeff Garzik | b7a00ec | 2006-10-01 07:27:46 -0400 | [diff] [blame] | 590 | if (err >= 0) |
| 591 | err = device_bind_driver(d); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 592 | |
Jeff Garzik | b7a00ec | 2006-10-01 07:27:46 -0400 | [diff] [blame] | 593 | if (err) |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 594 | return err; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | if (phydev->attached_dev) { |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 598 | dev_err(&dev->dev, "PHY already attached\n"); |
| 599 | return -EBUSY; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | phydev->attached_dev = dev; |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 603 | dev->phydev = phydev; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 604 | |
| 605 | phydev->dev_flags = flags; |
| 606 | |
Andy Fleming | e8a2b6a | 2006-12-01 12:01:06 -0600 | [diff] [blame] | 607 | phydev->interface = interface; |
| 608 | |
Anton Vorontsov | ef24b16 | 2010-08-24 14:46:12 -0700 | [diff] [blame] | 609 | phydev->state = PHY_READY; |
| 610 | |
Andy Fleming | e8a2b6a | 2006-12-01 12:01:06 -0600 | [diff] [blame] | 611 | /* Do initial configuration here, now that |
| 612 | * we have certain key parameters |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 613 | * (dev_flags and interface) |
| 614 | */ |
Marc Kleine-Budde | d005a09 | 2011-03-28 14:54:08 +0000 | [diff] [blame] | 615 | err = phy_init_hw(phydev); |
| 616 | if (err) |
| 617 | phy_detach(phydev); |
| 618 | |
Sebastian Hesselbarth | 1211ce5 | 2013-12-13 10:20:28 +0100 | [diff] [blame] | 619 | phy_resume(phydev); |
| 620 | |
Marc Kleine-Budde | d005a09 | 2011-03-28 14:54:08 +0000 | [diff] [blame] | 621 | return err; |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 622 | } |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 623 | |
| 624 | /** |
| 625 | * phy_attach - attach a network device to a particular PHY device |
| 626 | * @dev: network device to attach |
| 627 | * @bus_id: Bus ID of PHY device to attach |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 628 | * @interface: PHY device's interface |
| 629 | * |
| 630 | * Description: Same as phy_attach_direct() except that a PHY bus_id |
| 631 | * string is passed instead of a pointer to a struct phy_device. |
| 632 | */ |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 633 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
| 634 | phy_interface_t interface) |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 635 | { |
| 636 | struct bus_type *bus = &mdio_bus_type; |
| 637 | struct phy_device *phydev; |
| 638 | struct device *d; |
| 639 | int rc; |
| 640 | |
| 641 | /* Search the list of PHY devices on the mdio bus for the |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 642 | * PHY with the requested name |
| 643 | */ |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 644 | d = bus_find_device_by_name(bus, NULL, bus_id); |
| 645 | if (!d) { |
| 646 | pr_err("PHY %s not found\n", bus_id); |
| 647 | return ERR_PTR(-ENODEV); |
| 648 | } |
| 649 | phydev = to_phy_device(d); |
| 650 | |
Florian Fainelli | f9a8f83 | 2013-01-14 00:52:52 +0000 | [diff] [blame] | 651 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
Grant Likely | fa94f6d | 2009-04-25 12:52:51 +0000 | [diff] [blame] | 652 | if (rc) |
| 653 | return ERR_PTR(rc); |
| 654 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 655 | return phydev; |
| 656 | } |
| 657 | EXPORT_SYMBOL(phy_attach); |
| 658 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 659 | /** |
| 660 | * phy_detach - detach a PHY device from its network device |
| 661 | * @phydev: target phy_device struct |
| 662 | */ |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 663 | void phy_detach(struct phy_device *phydev) |
| 664 | { |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 665 | phydev->attached_dev->phydev = NULL; |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 666 | phydev->attached_dev = NULL; |
Sebastian Hesselbarth | 1211ce5 | 2013-12-13 10:20:28 +0100 | [diff] [blame] | 667 | phy_suspend(phydev); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 668 | |
| 669 | /* If the device had no specific driver before (i.e. - it |
| 670 | * was using the generic driver), we unbind the device |
| 671 | * from the generic driver so that there's a chance a |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 672 | * real driver could be loaded |
| 673 | */ |
Greg Kroah-Hartman | 87aebe0 | 2007-04-09 11:52:31 -0400 | [diff] [blame] | 674 | if (phydev->dev.driver == &genphy_driver.driver) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 675 | device_release_driver(&phydev->dev); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 676 | } |
| 677 | EXPORT_SYMBOL(phy_detach); |
| 678 | |
Sebastian Hesselbarth | 481b5d9 | 2013-12-13 10:20:27 +0100 | [diff] [blame] | 679 | int phy_suspend(struct phy_device *phydev) |
| 680 | { |
| 681 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); |
| 682 | struct ethtool_wolinfo wol; |
| 683 | |
| 684 | /* If the device has WOL enabled, we cannot suspend the PHY */ |
| 685 | wol.cmd = ETHTOOL_GWOL; |
| 686 | phy_ethtool_get_wol(phydev, &wol); |
| 687 | if (wol.wolopts) |
| 688 | return -EBUSY; |
| 689 | |
| 690 | if (phydrv->suspend) |
| 691 | return phydrv->suspend(phydev); |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | int phy_resume(struct phy_device *phydev) |
| 696 | { |
| 697 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); |
| 698 | |
| 699 | if (phydrv->resume) |
| 700 | return phydrv->resume(phydev); |
| 701 | return 0; |
| 702 | } |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 703 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 704 | /* Generic PHY support and helper functions */ |
| 705 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 706 | /** |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 707 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 708 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 709 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 710 | * Description: Writes MII_ADVERTISE with the appropriate values, |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 711 | * after sanitizing the values to make sure we only advertise |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 712 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
| 713 | * hasn't changed, and > 0 if it has changed. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 714 | */ |
stephen hemminger | 89ff05e | 2010-10-21 08:37:41 +0000 | [diff] [blame] | 715 | static int genphy_config_advert(struct phy_device *phydev) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 716 | { |
| 717 | u32 advertise; |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 718 | int oldadv, adv; |
| 719 | int err, changed = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 720 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 721 | /* Only allow advertising what this PHY supports */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 722 | phydev->advertising &= phydev->supported; |
| 723 | advertise = phydev->advertising; |
| 724 | |
| 725 | /* Setup standard advertisement */ |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 726 | adv = phy_read(phydev, MII_ADVERTISE); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 727 | |
| 728 | if (adv < 0) |
| 729 | return adv; |
| 730 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 731 | oldadv = adv; |
Matt Carlson | 28011cf | 2011-11-16 18:36:59 -0500 | [diff] [blame] | 732 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 733 | ADVERTISE_PAUSE_ASYM); |
Matt Carlson | 37f0702 | 2011-11-17 14:30:55 +0000 | [diff] [blame] | 734 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 735 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 736 | if (adv != oldadv) { |
| 737 | err = phy_write(phydev, MII_ADVERTISE, adv); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 738 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 739 | if (err < 0) |
| 740 | return err; |
| 741 | changed = 1; |
| 742 | } |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 743 | |
| 744 | /* Configure gigabit if it's supported */ |
| 745 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 746 | SUPPORTED_1000baseT_Full)) { |
| 747 | adv = phy_read(phydev, MII_CTRL1000); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 748 | |
| 749 | if (adv < 0) |
| 750 | return adv; |
| 751 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 752 | oldadv = adv; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 753 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); |
Matt Carlson | 37f0702 | 2011-11-17 14:30:55 +0000 | [diff] [blame] | 754 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 755 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 756 | if (adv != oldadv) { |
| 757 | err = phy_write(phydev, MII_CTRL1000, adv); |
| 758 | |
| 759 | if (err < 0) |
| 760 | return err; |
| 761 | changed = 1; |
| 762 | } |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 763 | } |
| 764 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 765 | return changed; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 766 | } |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 767 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 768 | /** |
| 769 | * genphy_setup_forced - configures/forces speed/duplex from @phydev |
| 770 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 771 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 772 | * Description: Configures MII_BMCR to force speed/duplex |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 773 | * to the values in phydev. Assumes that the values are valid. |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 774 | * Please see phy_sanitize_settings(). |
| 775 | */ |
Madalin Bucur | 3fb69bc | 2013-11-20 16:38:19 -0600 | [diff] [blame] | 776 | int genphy_setup_forced(struct phy_device *phydev) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 777 | { |
Domen Puncer | bc1e0a0 | 2007-08-17 08:54:45 +0200 | [diff] [blame] | 778 | int ctl = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 779 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 780 | phydev->pause = 0; |
| 781 | phydev->asym_pause = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 782 | |
| 783 | if (SPEED_1000 == phydev->speed) |
| 784 | ctl |= BMCR_SPEED1000; |
| 785 | else if (SPEED_100 == phydev->speed) |
| 786 | ctl |= BMCR_SPEED100; |
| 787 | |
| 788 | if (DUPLEX_FULL == phydev->duplex) |
| 789 | ctl |= BMCR_FULLDPLX; |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 790 | |
Sergei Shtylyov | e62a768 | 2014-01-05 03:21:52 +0300 | [diff] [blame] | 791 | return phy_write(phydev, MII_BMCR, ctl); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 792 | } |
Madalin Bucur | 3fb69bc | 2013-11-20 16:38:19 -0600 | [diff] [blame] | 793 | EXPORT_SYMBOL(genphy_setup_forced); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 794 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 795 | /** |
| 796 | * genphy_restart_aneg - Enable and Restart Autonegotiation |
| 797 | * @phydev: target phy_device struct |
| 798 | */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 799 | int genphy_restart_aneg(struct phy_device *phydev) |
| 800 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame^] | 801 | int ctl = phy_read(phydev, MII_BMCR); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 802 | |
| 803 | if (ctl < 0) |
| 804 | return ctl; |
| 805 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 806 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 807 | |
| 808 | /* Don't isolate the PHY if we're negotiating */ |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 809 | ctl &= ~BMCR_ISOLATE; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 810 | |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame^] | 811 | return phy_write(phydev, MII_BMCR, ctl); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 812 | } |
Adrian Bunk | 892871d | 2008-10-13 18:48:09 -0700 | [diff] [blame] | 813 | EXPORT_SYMBOL(genphy_restart_aneg); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 814 | |
| 815 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 816 | /** |
| 817 | * genphy_config_aneg - restart auto-negotiation or write BMCR |
| 818 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 819 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 820 | * Description: If auto-negotiation is enabled, we configure the |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 821 | * advertising, and then restart auto-negotiation. If it is not |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 822 | * enabled, then we write the BMCR. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 823 | */ |
| 824 | int genphy_config_aneg(struct phy_device *phydev) |
| 825 | { |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 826 | int result; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 827 | |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 828 | if (AUTONEG_ENABLE != phydev->autoneg) |
| 829 | return genphy_setup_forced(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 830 | |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 831 | result = genphy_config_advert(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 832 | |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 833 | if (result < 0) /* error */ |
| 834 | return result; |
| 835 | |
| 836 | if (result == 0) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 837 | /* Advertisement hasn't changed, but maybe aneg was never on to |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 838 | * begin with? Or maybe phy was isolated? |
| 839 | */ |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 840 | int ctl = phy_read(phydev, MII_BMCR); |
| 841 | |
| 842 | if (ctl < 0) |
| 843 | return ctl; |
| 844 | |
| 845 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) |
| 846 | result = 1; /* do restart aneg */ |
| 847 | } |
| 848 | |
| 849 | /* Only restart aneg if we are advertising something different |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 850 | * than we were before. |
| 851 | */ |
Trent Piepho | de339c2 | 2008-11-19 15:52:41 -0800 | [diff] [blame] | 852 | if (result > 0) |
| 853 | result = genphy_restart_aneg(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 854 | |
Trent Piepho | 51e2a38 | 2008-09-24 10:55:46 +0000 | [diff] [blame] | 855 | return result; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 856 | } |
| 857 | EXPORT_SYMBOL(genphy_config_aneg); |
| 858 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 859 | /** |
| 860 | * genphy_update_link - update link status in @phydev |
| 861 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 862 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 863 | * Description: Update the value in phydev->link to reflect the |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 864 | * current link value. In order to do this, we need to read |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 865 | * the status register twice, keeping the second value. |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 866 | */ |
| 867 | int genphy_update_link(struct phy_device *phydev) |
| 868 | { |
| 869 | int status; |
| 870 | |
| 871 | /* Do a fake read */ |
| 872 | status = phy_read(phydev, MII_BMSR); |
| 873 | |
| 874 | if (status < 0) |
| 875 | return status; |
| 876 | |
| 877 | /* Read link and autonegotiation status */ |
| 878 | status = phy_read(phydev, MII_BMSR); |
| 879 | |
| 880 | if (status < 0) |
| 881 | return status; |
| 882 | |
| 883 | if ((status & BMSR_LSTATUS) == 0) |
| 884 | phydev->link = 0; |
| 885 | else |
| 886 | phydev->link = 1; |
| 887 | |
| 888 | return 0; |
| 889 | } |
Andy Fleming | 6b65552 | 2006-10-16 16:19:17 -0500 | [diff] [blame] | 890 | EXPORT_SYMBOL(genphy_update_link); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 891 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 892 | /** |
| 893 | * genphy_read_status - check the link status and update current link state |
| 894 | * @phydev: target phy_device struct |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 895 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 896 | * Description: Check the link, then figure out the current state |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 897 | * by comparing what we advertise with what the link partner |
| 898 | * advertises. Start by checking the gigabit possibilities, |
| 899 | * then move on to 10/100. |
| 900 | */ |
| 901 | int genphy_read_status(struct phy_device *phydev) |
| 902 | { |
| 903 | int adv; |
| 904 | int err; |
| 905 | int lpa; |
| 906 | int lpagb = 0; |
| 907 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 908 | /* Update the link, but return if there was an error */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 909 | err = genphy_update_link(phydev); |
| 910 | if (err) |
| 911 | return err; |
| 912 | |
Florian Fainelli | 114002b | 2013-12-06 13:01:30 -0800 | [diff] [blame] | 913 | phydev->lp_advertising = 0; |
| 914 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 915 | if (AUTONEG_ENABLE == phydev->autoneg) { |
| 916 | if (phydev->supported & (SUPPORTED_1000baseT_Half |
| 917 | | SUPPORTED_1000baseT_Full)) { |
| 918 | lpagb = phy_read(phydev, MII_STAT1000); |
| 919 | |
| 920 | if (lpagb < 0) |
| 921 | return lpagb; |
| 922 | |
| 923 | adv = phy_read(phydev, MII_CTRL1000); |
| 924 | |
| 925 | if (adv < 0) |
| 926 | return adv; |
| 927 | |
Florian Fainelli | 114002b | 2013-12-06 13:01:30 -0800 | [diff] [blame] | 928 | phydev->lp_advertising = |
| 929 | mii_stat1000_to_ethtool_lpa_t(lpagb); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 930 | lpagb &= adv << 2; |
| 931 | } |
| 932 | |
| 933 | lpa = phy_read(phydev, MII_LPA); |
| 934 | |
| 935 | if (lpa < 0) |
| 936 | return lpa; |
| 937 | |
Florian Fainelli | 114002b | 2013-12-06 13:01:30 -0800 | [diff] [blame] | 938 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
| 939 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 940 | adv = phy_read(phydev, MII_ADVERTISE); |
| 941 | |
| 942 | if (adv < 0) |
| 943 | return adv; |
| 944 | |
| 945 | lpa &= adv; |
| 946 | |
| 947 | phydev->speed = SPEED_10; |
| 948 | phydev->duplex = DUPLEX_HALF; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 949 | phydev->pause = 0; |
| 950 | phydev->asym_pause = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 951 | |
| 952 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { |
| 953 | phydev->speed = SPEED_1000; |
| 954 | |
| 955 | if (lpagb & LPA_1000FULL) |
| 956 | phydev->duplex = DUPLEX_FULL; |
| 957 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { |
| 958 | phydev->speed = SPEED_100; |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 959 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 960 | if (lpa & LPA_100FULL) |
| 961 | phydev->duplex = DUPLEX_FULL; |
| 962 | } else |
| 963 | if (lpa & LPA_10FULL) |
| 964 | phydev->duplex = DUPLEX_FULL; |
| 965 | |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 966 | if (phydev->duplex == DUPLEX_FULL) { |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 967 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
| 968 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; |
| 969 | } |
| 970 | } else { |
| 971 | int bmcr = phy_read(phydev, MII_BMCR); |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 972 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 973 | if (bmcr < 0) |
| 974 | return bmcr; |
| 975 | |
| 976 | if (bmcr & BMCR_FULLDPLX) |
| 977 | phydev->duplex = DUPLEX_FULL; |
| 978 | else |
| 979 | phydev->duplex = DUPLEX_HALF; |
| 980 | |
| 981 | if (bmcr & BMCR_SPEED1000) |
| 982 | phydev->speed = SPEED_1000; |
| 983 | else if (bmcr & BMCR_SPEED100) |
| 984 | phydev->speed = SPEED_100; |
| 985 | else |
| 986 | phydev->speed = SPEED_10; |
| 987 | |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 988 | phydev->pause = 0; |
| 989 | phydev->asym_pause = 0; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 990 | } |
| 991 | |
| 992 | return 0; |
| 993 | } |
| 994 | EXPORT_SYMBOL(genphy_read_status); |
| 995 | |
| 996 | static int genphy_config_init(struct phy_device *phydev) |
| 997 | { |
Eric Sesterhenn | 84c22d7 | 2006-09-25 16:39:22 -0700 | [diff] [blame] | 998 | int val; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 999 | u32 features; |
| 1000 | |
| 1001 | /* For now, I'll claim that the generic driver supports |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1002 | * all possible port types |
| 1003 | */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1004 | features = (SUPPORTED_TP | SUPPORTED_MII |
| 1005 | | SUPPORTED_AUI | SUPPORTED_FIBRE | |
| 1006 | SUPPORTED_BNC); |
| 1007 | |
| 1008 | /* Do we support autonegotiation? */ |
| 1009 | val = phy_read(phydev, MII_BMSR); |
| 1010 | |
| 1011 | if (val < 0) |
| 1012 | return val; |
| 1013 | |
| 1014 | if (val & BMSR_ANEGCAPABLE) |
| 1015 | features |= SUPPORTED_Autoneg; |
| 1016 | |
| 1017 | if (val & BMSR_100FULL) |
| 1018 | features |= SUPPORTED_100baseT_Full; |
| 1019 | if (val & BMSR_100HALF) |
| 1020 | features |= SUPPORTED_100baseT_Half; |
| 1021 | if (val & BMSR_10FULL) |
| 1022 | features |= SUPPORTED_10baseT_Full; |
| 1023 | if (val & BMSR_10HALF) |
| 1024 | features |= SUPPORTED_10baseT_Half; |
| 1025 | |
| 1026 | if (val & BMSR_ESTATEN) { |
| 1027 | val = phy_read(phydev, MII_ESTATUS); |
| 1028 | |
| 1029 | if (val < 0) |
| 1030 | return val; |
| 1031 | |
| 1032 | if (val & ESTATUS_1000_TFULL) |
| 1033 | features |= SUPPORTED_1000baseT_Full; |
| 1034 | if (val & ESTATUS_1000_THALF) |
| 1035 | features |= SUPPORTED_1000baseT_Half; |
| 1036 | } |
| 1037 | |
| 1038 | phydev->supported = features; |
| 1039 | phydev->advertising = features; |
| 1040 | |
| 1041 | return 0; |
| 1042 | } |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1043 | int genphy_suspend(struct phy_device *phydev) |
| 1044 | { |
| 1045 | int value; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1046 | |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1047 | mutex_lock(&phydev->lock); |
| 1048 | |
| 1049 | value = phy_read(phydev, MII_BMCR); |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1050 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1051 | |
| 1052 | mutex_unlock(&phydev->lock); |
| 1053 | |
| 1054 | return 0; |
| 1055 | } |
| 1056 | EXPORT_SYMBOL(genphy_suspend); |
| 1057 | |
| 1058 | int genphy_resume(struct phy_device *phydev) |
| 1059 | { |
| 1060 | int value; |
| 1061 | |
| 1062 | mutex_lock(&phydev->lock); |
| 1063 | |
| 1064 | value = phy_read(phydev, MII_BMCR); |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1065 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1066 | |
| 1067 | mutex_unlock(&phydev->lock); |
| 1068 | |
| 1069 | return 0; |
| 1070 | } |
| 1071 | EXPORT_SYMBOL(genphy_resume); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1072 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1073 | /** |
| 1074 | * phy_probe - probe and init a PHY device |
| 1075 | * @dev: device to probe and init |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1076 | * |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1077 | * Description: Take care of setting up the phy_device structure, |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1078 | * set the state to READY (the driver's init function should |
| 1079 | * set it to STARTING if needed). |
| 1080 | */ |
| 1081 | static int phy_probe(struct device *dev) |
| 1082 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame^] | 1083 | struct phy_device *phydev = to_phy_device(dev); |
| 1084 | struct device_driver *drv = phydev->dev.driver; |
| 1085 | struct phy_driver *phydrv = to_phy_driver(drv); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1086 | int err = 0; |
| 1087 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1088 | phydev->drv = phydrv; |
| 1089 | |
Florian Fainelli | 2c7b492 | 2013-05-19 22:53:42 +0000 | [diff] [blame] | 1090 | /* Disable the interrupt if the PHY doesn't support it |
| 1091 | * but the interrupt is still a valid one |
| 1092 | */ |
| 1093 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1094 | phy_interrupt_is_valid(phydev)) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1095 | phydev->irq = PHY_POLL; |
| 1096 | |
Florian Fainelli | 4284b6a | 2013-05-23 01:11:12 +0000 | [diff] [blame] | 1097 | if (phydrv->flags & PHY_IS_INTERNAL) |
| 1098 | phydev->is_internal = true; |
| 1099 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1100 | mutex_lock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1101 | |
| 1102 | /* Start out supporting everything. Eventually, |
| 1103 | * a controller will attach, and may modify one |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1104 | * or both of these values |
| 1105 | */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1106 | phydev->supported = phydrv->features; |
| 1107 | phydev->advertising = phydrv->features; |
| 1108 | |
| 1109 | /* Set the state to READY by default */ |
| 1110 | phydev->state = PHY_READY; |
| 1111 | |
| 1112 | if (phydev->drv->probe) |
| 1113 | err = phydev->drv->probe(phydev); |
| 1114 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1115 | mutex_unlock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1116 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1117 | return err; |
| 1118 | } |
| 1119 | |
| 1120 | static int phy_remove(struct device *dev) |
| 1121 | { |
Sergei Shtylyov | 553fe92 | 2014-01-05 03:23:19 +0300 | [diff] [blame^] | 1122 | struct phy_device *phydev = to_phy_device(dev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1123 | |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1124 | mutex_lock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1125 | phydev->state = PHY_DOWN; |
Nate Case | 35b5f6b | 2008-01-29 10:05:09 -0600 | [diff] [blame] | 1126 | mutex_unlock(&phydev->lock); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1127 | |
| 1128 | if (phydev->drv->remove) |
| 1129 | phydev->drv->remove(phydev); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1130 | phydev->drv = NULL; |
| 1131 | |
| 1132 | return 0; |
| 1133 | } |
| 1134 | |
Randy Dunlap | b3df0da | 2007-03-06 02:41:48 -0800 | [diff] [blame] | 1135 | /** |
| 1136 | * phy_driver_register - register a phy_driver with the PHY layer |
| 1137 | * @new_driver: new phy_driver to register |
| 1138 | */ |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1139 | int phy_driver_register(struct phy_driver *new_driver) |
| 1140 | { |
| 1141 | int retval; |
| 1142 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1143 | new_driver->driver.name = new_driver->name; |
| 1144 | new_driver->driver.bus = &mdio_bus_type; |
| 1145 | new_driver->driver.probe = phy_probe; |
| 1146 | new_driver->driver.remove = phy_remove; |
| 1147 | |
| 1148 | retval = driver_register(&new_driver->driver); |
| 1149 | |
| 1150 | if (retval) { |
Joe Perches | 8d24248 | 2012-06-09 07:49:07 +0000 | [diff] [blame] | 1151 | pr_err("%s: Error %d in registering driver\n", |
| 1152 | new_driver->name, retval); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1153 | |
| 1154 | return retval; |
| 1155 | } |
| 1156 | |
Olof Johansson | f2511f1 | 2007-11-04 16:09:23 -0600 | [diff] [blame] | 1157 | pr_debug("%s: Registered new driver\n", new_driver->name); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1158 | |
| 1159 | return 0; |
| 1160 | } |
| 1161 | EXPORT_SYMBOL(phy_driver_register); |
| 1162 | |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1163 | int phy_drivers_register(struct phy_driver *new_driver, int n) |
| 1164 | { |
| 1165 | int i, ret = 0; |
| 1166 | |
| 1167 | for (i = 0; i < n; i++) { |
| 1168 | ret = phy_driver_register(new_driver + i); |
| 1169 | if (ret) { |
| 1170 | while (i-- > 0) |
| 1171 | phy_driver_unregister(new_driver + i); |
| 1172 | break; |
| 1173 | } |
| 1174 | } |
| 1175 | return ret; |
| 1176 | } |
| 1177 | EXPORT_SYMBOL(phy_drivers_register); |
| 1178 | |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1179 | void phy_driver_unregister(struct phy_driver *drv) |
| 1180 | { |
| 1181 | driver_unregister(&drv->driver); |
| 1182 | } |
| 1183 | EXPORT_SYMBOL(phy_driver_unregister); |
| 1184 | |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1185 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
| 1186 | { |
| 1187 | int i; |
Sergei Shtylyov | 2f53e90 | 2014-01-05 03:17:06 +0300 | [diff] [blame] | 1188 | |
| 1189 | for (i = 0; i < n; i++) |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1190 | phy_driver_unregister(drv + i); |
Christian Hohnstaedt | d5bf907 | 2012-07-04 05:44:34 +0000 | [diff] [blame] | 1191 | } |
| 1192 | EXPORT_SYMBOL(phy_drivers_unregister); |
| 1193 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1194 | static struct phy_driver genphy_driver = { |
| 1195 | .phy_id = 0xffffffff, |
| 1196 | .phy_id_mask = 0xffffffff, |
| 1197 | .name = "Generic PHY", |
| 1198 | .config_init = genphy_config_init, |
| 1199 | .features = 0, |
| 1200 | .config_aneg = genphy_config_aneg, |
| 1201 | .read_status = genphy_read_status, |
Giuseppe Cavallaro | 0f0ca34 | 2008-11-28 16:24:56 -0800 | [diff] [blame] | 1202 | .suspend = genphy_suspend, |
| 1203 | .resume = genphy_resume, |
Florian Fainelli | e109374 | 2013-12-17 21:38:12 -0800 | [diff] [blame] | 1204 | .driver = { .owner = THIS_MODULE, }, |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1205 | }; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1206 | |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1207 | static int __init phy_init(void) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1208 | { |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1209 | int rc; |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1210 | |
| 1211 | rc = mdio_bus_init(); |
| 1212 | if (rc) |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1213 | return rc; |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1214 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1215 | rc = phy_driver_register(&genphy_driver); |
| 1216 | if (rc) |
| 1217 | mdio_bus_exit(); |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1218 | |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1219 | return rc; |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1220 | } |
| 1221 | |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1222 | static void __exit phy_exit(void) |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1223 | { |
| 1224 | phy_driver_unregister(&genphy_driver); |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1225 | mdio_bus_exit(); |
Andy Fleming | 00db818 | 2005-07-30 19:31:23 -0400 | [diff] [blame] | 1226 | } |
| 1227 | |
Andy Fleming | e139345 | 2005-08-24 18:46:21 -0500 | [diff] [blame] | 1228 | subsys_initcall(phy_init); |
Jeff Garzik | 67c4f3f | 2005-08-11 02:07:25 -0400 | [diff] [blame] | 1229 | module_exit(phy_exit); |