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49099122 HS |
1 | /* |
2 | * Driver for AMD am79c PHYs | |
3 | * | |
4 | * Author: Heiko Schocher <hs@denx.de> | |
5 | * | |
6 | * Copyright (c) 2011 DENX Software Engineering GmbH | |
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 | */ | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/mii.h> | |
19 | #include <linux/phy.h> | |
20 | ||
21 | #define PHY_ID_AM79C874 0x0022561b | |
22 | ||
23 | #define MII_AM79C_IR 17 /* Interrupt Status/Control Register */ | |
24 | #define MII_AM79C_IR_EN_LINK 0x0400 /* IR enable Linkstate */ | |
25 | #define MII_AM79C_IR_EN_ANEG 0x0100 /* IR enable Aneg Complete */ | |
26 | #define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG) | |
27 | ||
28 | MODULE_DESCRIPTION("AMD PHY driver"); | |
29 | MODULE_AUTHOR("Heiko Schocher <hs@denx.de>"); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
32 | static int am79c_ack_interrupt(struct phy_device *phydev) | |
33 | { | |
34 | int err; | |
35 | ||
36 | err = phy_read(phydev, MII_BMSR); | |
37 | if (err < 0) | |
38 | return err; | |
39 | ||
40 | err = phy_read(phydev, MII_AM79C_IR); | |
41 | if (err < 0) | |
42 | return err; | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | static int am79c_config_init(struct phy_device *phydev) | |
48 | { | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static int am79c_config_intr(struct phy_device *phydev) | |
53 | { | |
54 | int err; | |
55 | ||
56 | if (phydev->interrupts == PHY_INTERRUPT_ENABLED) | |
57 | err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT); | |
58 | else | |
59 | err = phy_write(phydev, MII_AM79C_IR, 0); | |
60 | ||
61 | return err; | |
62 | } | |
63 | ||
64 | static struct phy_driver am79c_driver = { | |
65 | .phy_id = PHY_ID_AM79C874, | |
66 | .name = "AM79C874", | |
67 | .phy_id_mask = 0xfffffff0, | |
68 | .features = PHY_BASIC_FEATURES, | |
69 | .flags = PHY_HAS_INTERRUPT, | |
70 | .config_init = am79c_config_init, | |
71 | .config_aneg = genphy_config_aneg, | |
72 | .read_status = genphy_read_status, | |
73 | .ack_interrupt = am79c_ack_interrupt, | |
74 | .config_intr = am79c_config_intr, | |
75 | .driver = { .owner = THIS_MODULE,}, | |
76 | }; | |
77 | ||
78 | static int __init am79c_init(void) | |
79 | { | |
d5bf9071 | 80 | return phy_driver_register(&am79c_driver); |
49099122 HS |
81 | } |
82 | ||
83 | static void __exit am79c_exit(void) | |
84 | { | |
85 | phy_driver_unregister(&am79c_driver); | |
86 | } | |
87 | ||
88 | module_init(am79c_init); | |
89 | module_exit(am79c_exit); | |
90 | ||
91 | static struct mdio_device_id __maybe_unused amd_tbl[] = { | |
92 | { PHY_ID_AM79C874, 0xfffffff0 }, | |
93 | { } | |
94 | }; | |
95 | ||
96 | MODULE_DEVICE_TABLE(mdio, amd_tbl); |