1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * drivers/net/phy/ste10Xp.c |
4 | * |
5 | * Driver for STMicroelectronics STe10Xp PHYs |
6 | * |
7 | * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> |
8 | * |
9 | * Copyright (c) 2008 STMicroelectronics Limited |
10 | */ |
11 | |
12 | #include <linux/module.h> |
13 | #include <linux/init.h> |
14 | #include <linux/sched.h> |
15 | #include <linux/kernel.h> |
16 | #include <linux/moduleparam.h> |
17 | #include <linux/interrupt.h> |
18 | #include <linux/netdevice.h> |
19 | #include <linux/ethtool.h> |
20 | #include <linux/mii.h> |
21 | #include <linux/phy.h> |
22 | |
23 | #define MII_XCIIS 0x11 /* Configuration Info IRQ & Status Reg */ |
24 | #define MII_XIE 0x12 /* Interrupt Enable Register */ |
25 | #define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */ |
26 | |
27 | #define STE101P_PHY_ID 0x00061c50 |
28 | #define STE100P_PHY_ID 0x1c040011 |
29 | |
30 | static int ste10Xp_config_init(struct phy_device *phydev) |
31 | { |
32 | int value, err; |
33 | |
34 | /* Software Reset PHY */ |
35 | value = phy_read(phydev, MII_BMCR); |
36 | if (value < 0) |
37 | return value; |
38 | |
39 | value |= BMCR_RESET; |
40 | err = phy_write(phydev, MII_BMCR, val: value); |
41 | if (err < 0) |
42 | return err; |
43 | |
44 | do { |
45 | value = phy_read(phydev, MII_BMCR); |
46 | } while (value & BMCR_RESET); |
47 | |
48 | return 0; |
49 | } |
50 | |
51 | static int ste10Xp_ack_interrupt(struct phy_device *phydev) |
52 | { |
53 | int err = phy_read(phydev, MII_XCIIS); |
54 | |
55 | if (err < 0) |
56 | return err; |
57 | |
58 | return 0; |
59 | } |
60 | |
61 | static int ste10Xp_config_intr(struct phy_device *phydev) |
62 | { |
63 | int err; |
64 | |
65 | if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { |
66 | /* clear any pending interrupts */ |
67 | err = ste10Xp_ack_interrupt(phydev); |
68 | if (err) |
69 | return err; |
70 | |
71 | /* Enable all STe101P interrupts (PR12) */ |
72 | err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK); |
73 | } else { |
74 | err = phy_write(phydev, MII_XIE, val: 0); |
75 | if (err) |
76 | return err; |
77 | |
78 | err = ste10Xp_ack_interrupt(phydev); |
79 | } |
80 | |
81 | return err; |
82 | } |
83 | |
84 | static irqreturn_t ste10Xp_handle_interrupt(struct phy_device *phydev) |
85 | { |
86 | int irq_status; |
87 | |
88 | irq_status = phy_read(phydev, MII_XCIIS); |
89 | if (irq_status < 0) { |
90 | phy_error(phydev); |
91 | return IRQ_NONE; |
92 | } |
93 | |
94 | if (!(irq_status & MII_XIE_DEFAULT_MASK)) |
95 | return IRQ_NONE; |
96 | |
97 | phy_trigger_machine(phydev); |
98 | |
99 | return IRQ_HANDLED; |
100 | } |
101 | |
102 | static struct phy_driver ste10xp_pdriver[] = { |
103 | { |
104 | .phy_id = STE101P_PHY_ID, |
105 | .phy_id_mask = 0xfffffff0, |
106 | .name = "STe101p" , |
107 | /* PHY_BASIC_FEATURES */ |
108 | .config_init = ste10Xp_config_init, |
109 | .config_intr = ste10Xp_config_intr, |
110 | .handle_interrupt = ste10Xp_handle_interrupt, |
111 | .suspend = genphy_suspend, |
112 | .resume = genphy_resume, |
113 | }, { |
114 | .phy_id = STE100P_PHY_ID, |
115 | .phy_id_mask = 0xffffffff, |
116 | .name = "STe100p" , |
117 | /* PHY_BASIC_FEATURES */ |
118 | .config_init = ste10Xp_config_init, |
119 | .config_intr = ste10Xp_config_intr, |
120 | .handle_interrupt = ste10Xp_handle_interrupt, |
121 | .suspend = genphy_suspend, |
122 | .resume = genphy_resume, |
123 | } }; |
124 | |
125 | module_phy_driver(ste10xp_pdriver); |
126 | |
127 | static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = { |
128 | { STE101P_PHY_ID, 0xfffffff0 }, |
129 | { STE100P_PHY_ID, 0xffffffff }, |
130 | { } |
131 | }; |
132 | |
133 | MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl); |
134 | |
135 | MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver" ); |
136 | MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>" ); |
137 | MODULE_LICENSE("GPL" ); |
138 | |