1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright 2011 Freescale Semiconductor, Inc.
6 * This file pretty much stolen from Linux's mii.h/ethtool.h/phy.h
12 #include <asm-generic/gpio.h>
14 #include <phy_interface.h>
15 #include <dm/ofnode.h>
17 #include <linux/errno.h>
18 #include <linux/list.h>
19 #include <linux/mii.h>
20 #include <linux/ethtool.h>
21 #include <linux/mdio.h>
25 #define PHY_FIXED_ID 0xa5a55a5a
26 #define PHY_NCSI_ID 0xbeefcafe
29 * There is no actual id for this.
30 * This is just a dummy id for gmii2rgmmi converter.
32 #define PHY_GMII2RGMII_ID 0x5a5a5a5a
34 #define PHY_MAX_ADDR 32
36 #define PHY_FLAG_BROKEN_RESET (1 << 0) /* soft reset not supported */
38 #define PHY_DEFAULT_FEATURES (SUPPORTED_Autoneg | \
42 #define PHY_10BT_FEATURES (SUPPORTED_10baseT_Half | \
43 SUPPORTED_10baseT_Full)
45 #define PHY_100BT_FEATURES (SUPPORTED_100baseT_Half | \
46 SUPPORTED_100baseT_Full)
48 #define PHY_1000BT_FEATURES (SUPPORTED_1000baseT_Half | \
49 SUPPORTED_1000baseT_Full)
51 #define PHY_BASIC_FEATURES (PHY_10BT_FEATURES | \
52 PHY_100BT_FEATURES | \
55 #define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES | \
58 #define PHY_10G_FEATURES (PHY_GBIT_FEATURES | \
59 SUPPORTED_10000baseT_Full)
63 #define MDIO_NAME_LEN 32
66 struct list_head link;
67 char name[MDIO_NAME_LEN];
69 int (*read)(struct mii_dev *bus, int addr, int devad, int reg);
70 int (*write)(struct mii_dev *bus, int addr, int devad, int reg,
72 int (*reset)(struct mii_dev *bus);
73 struct phy_device *phymap[PHY_MAX_ADDR];
75 /** @reset_delay_us: Bus GPIO reset pulse width in microseconds */
77 /** @reset_post_delay_us: Bus GPIO reset deassert delay in microseconds */
78 int reset_post_delay_us;
79 /** @reset_gpiod: Bus Reset GPIO descriptor pointer */
80 struct gpio_desc reset_gpiod;
83 /* struct phy_driver: a structure which defines PHY behavior
85 * uid will contain a number which represents the PHY. During
86 * startup, the driver will poll the PHY to find out what its
87 * UID--as defined by registers 2 and 3--is. The 32-bit result
88 * gotten from the PHY will be masked to
89 * discard any bits which may change based on revision numbers
90 * unimportant to functionality
101 /* Called to do any driver startup necessities */
102 /* Will be called during phy_connect */
103 int (*probe)(struct phy_device *phydev);
105 /* Called to configure the PHY, and modify the controller
106 * based on the results. Should be called after phy_connect */
107 int (*config)(struct phy_device *phydev);
109 /* Called when starting up the controller */
110 int (*startup)(struct phy_device *phydev);
112 /* Called when bringing down the controller */
113 int (*shutdown)(struct phy_device *phydev);
115 int (*readext)(struct phy_device *phydev, int addr, int devad, int reg);
116 int (*writeext)(struct phy_device *phydev, int addr, int devad, int reg,
119 /* Phy specific driver override for reading a MMD register */
120 int (*read_mmd)(struct phy_device *phydev, int devad, int reg);
122 /* Phy specific driver override for writing a MMD register */
123 int (*write_mmd)(struct phy_device *phydev, int devad, int reg,
126 /* driver private data */
131 /* Information about the PHY type */
132 /* And management functions */
134 struct phy_driver *drv;
140 /* forced speed & duplex (no autoneg)
141 * partner speed & duplex & pause (autoneg)
146 /* The most recently read link state */
149 phy_interface_t interface;
173 * phy_reset() - Resets the specified PHY
174 * Issues a reset of the PHY and waits for it to complete
176 * @phydev: PHY to reset
177 * @return: 0 if OK, -ve on error
179 int phy_reset(struct phy_device *phydev);
182 * phy_gpio_reset() - Resets the specified PHY using GPIO reset
183 * Toggles the optional PHY reset GPIO
185 * @dev: PHY udevice to reset
186 * @return: 0 if OK, -ve on error
188 int phy_gpio_reset(struct udevice *dev);
191 * phy_find_by_mask() - Searches for a PHY on the specified MDIO bus
192 * The function checks the PHY addresses flagged in phy_mask and returns a
193 * phy_device pointer if it detects a PHY.
194 * This function should only be called if just one PHY is expected to be present
195 * in the set of addresses flagged in phy_mask. If multiple PHYs are present,
196 * it is undefined which of these PHYs is returned.
198 * @bus: MII/MDIO bus to scan
199 * @phy_mask: bitmap of PYH addresses to scan
200 * @return: pointer to phy_device if a PHY is found, or NULL otherwise
202 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask);
204 #ifdef CONFIG_PHY_FIXED
207 * fixed_phy_create() - create an unconnected fixed-link pseudo-PHY device
208 * @node: OF node for the container of the fixed-link node
210 * Description: Creates a struct phy_device based on a fixed-link of_node
211 * description. Can be used without phy_connect by drivers which do not expose
212 * a UCLASS_ETH udevice.
214 struct phy_device *fixed_phy_create(ofnode node);
218 static inline struct phy_device *fixed_phy_create(ofnode node)
226 * phy_connect() - Creates a PHY device for the Ethernet interface
227 * Creates a PHY device for the PHY at the given address, if one doesn't exist
228 * already, and associates it with the Ethernet device.
229 * The function may be called with addr <= 0, in this case addr value is ignored
230 * and the bus is scanned to detect a PHY. Scanning should only be used if only
231 * one PHY is expected to be present on the MDIO bus, otherwise it is undefined
232 * which PHY is returned.
234 * @bus: MII/MDIO bus that hosts the PHY
235 * @addr: PHY address on MDIO bus
236 * @dev: Ethernet device to associate to the PHY
237 * @interface: type of MAC-PHY interface
238 * @return: pointer to phy_device if a PHY is found, or NULL otherwise
240 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
242 phy_interface_t interface);
244 * phy_device_create() - Create a PHY device
246 * @bus: MII/MDIO bus that hosts the PHY
247 * @addr: PHY address on MDIO bus
248 * @phy_id: where to store the ID retrieved
249 * @is_c45: Device Identifiers if is_c45
250 * @return: pointer to phy_device if a PHY is found, or NULL otherwise
252 struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
253 u32 phy_id, bool is_c45);
256 * phy_connect_phy_id() - Connect to phy device by reading PHY id
259 * @bus: MII/MDIO bus that hosts the PHY
260 * @dev: Ethernet device to associate to the PHY
261 * @return: pointer to phy_device if a PHY is found,
264 struct phy_device *phy_connect_phy_id(struct mii_dev *bus, struct udevice *dev,
267 static inline ofnode phy_get_ofnode(struct phy_device *phydev)
269 if (ofnode_valid(phydev->node))
272 return dev_ofnode(phydev->dev);
276 * phy_read_mmd_poll_timeout - Periodically poll a PHY register until a
277 * condition is met or a timeout occurs
279 * @phydev: The phy_device struct
280 * @devaddr: The MMD to read from
281 * @regnum: The register on the MMD to read
282 * @val: Variable to read the register into
283 * @cond: Break condition (usually involving @val)
284 * @sleep_us: Maximum time to sleep between reads in us (0
285 * tight-loops). Should be less than ~20ms since usleep_range
286 * is used (see Documentation/timers/timers-howto.rst).
287 * @timeout_us: Timeout in us, 0 means never timeout
288 * @sleep_before_read: if it is true, sleep @sleep_us before read.
289 * Returns 0 on success and -ETIMEDOUT upon a timeout. In either
290 * case, the last read value at @args is stored in @val. Must not
291 * be called from atomic context if sleep_us or timeout_us are used.
293 #define phy_read_mmd_poll_timeout(phydev, devaddr, regnum, val, cond, \
294 sleep_us, timeout_us, sleep_before_read) \
296 int __ret = read_poll_timeout(phy_read_mmd, val, (cond) || val < 0, \
297 sleep_us, timeout_us, \
298 phydev, devaddr, regnum); \
302 dev_err(phydev->dev, "%s failed: %d\n", __func__, __ret); \
306 int phy_read(struct phy_device *phydev, int devad, int regnum);
307 int phy_write(struct phy_device *phydev, int devad, int regnum, u16 val);
308 void phy_mmd_start_indirect(struct phy_device *phydev, int devad, int regnum);
309 int phy_read_mmd(struct phy_device *phydev, int devad, int regnum);
310 int phy_write_mmd(struct phy_device *phydev, int devad, int regnum, u16 val);
311 int phy_set_bits_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
312 int phy_clear_bits_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
313 int phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum,
315 int phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum,
318 int phy_startup(struct phy_device *phydev);
319 int phy_config(struct phy_device *phydev);
320 int phy_shutdown(struct phy_device *phydev);
321 int phy_set_supported(struct phy_device *phydev, u32 max_speed);
322 int phy_modify(struct phy_device *phydev, int devad, int regnum, u16 mask,
324 int genphy_config_aneg(struct phy_device *phydev);
325 int genphy_restart_aneg(struct phy_device *phydev);
326 int genphy_update_link(struct phy_device *phydev);
327 int genphy_parse_link(struct phy_device *phydev);
328 int genphy_config(struct phy_device *phydev);
329 int genphy_startup(struct phy_device *phydev);
330 int genphy_shutdown(struct phy_device *phydev);
331 int gen10g_config(struct phy_device *phydev);
332 int gen10g_startup(struct phy_device *phydev);
333 int gen10g_shutdown(struct phy_device *phydev);
334 int gen10g_discover_mmds(struct phy_device *phydev);
337 * U_BOOT_PHY_DRIVER() - Declare a new U-Boot driver
338 * @__name: name of the driver
340 #define U_BOOT_PHY_DRIVER(__name) \
341 ll_entry_declare(struct phy_driver, __name, phy_driver)
343 int board_phy_config(struct phy_device *phydev);
344 int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id);
347 * phy_interface_is_rgmii - Convenience function for testing if a PHY interface
348 * is RGMII (all variants)
349 * @phydev: the phy_device struct
350 * @return: true if MII bus is RGMII or false if it is not
352 static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
354 switch (phydev->interface) {
355 case PHY_INTERFACE_MODE_RGMII:
356 case PHY_INTERFACE_MODE_RGMII_ID:
357 case PHY_INTERFACE_MODE_RGMII_RXID:
358 case PHY_INTERFACE_MODE_RGMII_TXID:
365 bool phy_interface_is_ncsi(void);
367 /* PHY UIDs for various PHYs that are referenced in external code */
368 #define PHY_UID_CS4340 0x13e51002
369 #define PHY_UID_CS4223 0x03e57003
370 #define PHY_UID_TN2020 0x00a19410
371 #define PHY_UID_IN112525_S03 0x02107440