tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2// Copyright (C) 2018 Microchip Technology
3
4#include <linux/kernel.h>
5#include <linux/module.h>
6#include <linux/mii.h>
7#include <linux/phy.h>
8
9/* Interrupt Source Register */
10#define LAN87XX_INTERRUPT_SOURCE (0x18)
11
12/* Interrupt Mask Register */
13#define LAN87XX_INTERRUPT_MASK (0x19)
14#define LAN87XX_MASK_LINK_UP (0x0004)
15#define LAN87XX_MASK_LINK_DOWN (0x0002)
16
17#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>"
18#define DRIVER_DESC "Microchip LAN87XX T1 PHY driver"
19
20static int lan87xx_phy_config_intr(struct phy_device *phydev)
21{
22 int rc, val = 0;
23
24 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
25 /* unmask all source and clear them before enable */
26 rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0x7FFF);
27 rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
28 val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN;
29 }
30
31 rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
32
33 return rc < 0 ? rc : 0;
34}
35
36static int lan87xx_phy_ack_interrupt(struct phy_device *phydev)
37{
38 int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
39
40 return rc < 0 ? rc : 0;
41}
42
43static struct phy_driver microchip_t1_phy_driver[] = {
44 {
45 .phy_id = 0x0007c150,
46 .phy_id_mask = 0xfffffff0,
47 .name = "Microchip LAN87xx T1",
48
49 .features = PHY_BASIC_T1_FEATURES,
50
51 .config_init = genphy_config_init,
52 .config_aneg = genphy_config_aneg,
53
54 .ack_interrupt = lan87xx_phy_ack_interrupt,
55 .config_intr = lan87xx_phy_config_intr,
56
57 .suspend = genphy_suspend,
58 .resume = genphy_resume,
59 }
60};
61
62module_phy_driver(microchip_t1_phy_driver);
63
64static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
65 { 0x0007c150, 0xfffffff0 },
66 { }
67};
68
69MODULE_DEVICE_TABLE(mdio, microchip_t1_tbl);
70
71MODULE_AUTHOR(DRIVER_AUTHOR);
72MODULE_DESCRIPTION(DRIVER_DESC);
73MODULE_LICENSE("GPL");