2 * Driver for the Texas Instruments DP83848 PHY
4 * Copyright (C) 2015 Texas Instruments Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/module.h>
17 #include <linux/phy.h>
19 #define DP83848_PHY_ID 0x20005c90
22 #define DP83848_MICR 0x11
23 #define DP83848_MISR 0x12
25 /* MICR Register Fields */
26 #define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
27 #define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
29 /* MISR Register Fields */
30 #define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
31 #define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
32 #define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
33 #define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
34 #define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
35 #define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
36 #define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
37 #define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
39 static int dp83848_ack_interrupt(struct phy_device
*phydev
)
41 int err
= phy_read(phydev
, DP83848_MISR
);
43 return err
< 0 ? err
: 0;
46 static int dp83848_config_intr(struct phy_device
*phydev
)
50 if (phydev
->interrupts
== PHY_INTERRUPT_ENABLED
) {
51 err
= phy_write(phydev
, DP83848_MICR
,
57 return phy_write(phydev
, DP83848_MISR
,
58 DP83848_MISR_ANC_INT_EN
|
59 DP83848_MISR_DUP_INT_EN
|
60 DP83848_MISR_SPD_INT_EN
|
61 DP83848_MISR_LINK_INT_EN
);
64 return phy_write(phydev
, DP83848_MICR
, 0x0);
67 static struct mdio_device_id __maybe_unused dp83848_tbl
[] = {
68 { DP83848_PHY_ID
, 0xfffffff0 },
71 MODULE_DEVICE_TABLE(mdio
, dp83848_tbl
);
73 static struct phy_driver dp83848_driver
[] = {
75 .phy_id
= DP83848_PHY_ID
,
76 .phy_id_mask
= 0xfffffff0,
78 .features
= PHY_BASIC_FEATURES
,
79 .flags
= PHY_HAS_INTERRUPT
,
81 .soft_reset
= genphy_soft_reset
,
82 .config_init
= genphy_config_init
,
83 .suspend
= genphy_suspend
,
84 .resume
= genphy_resume
,
85 .config_aneg
= genphy_config_aneg
,
86 .read_status
= genphy_read_status
,
89 .ack_interrupt
= dp83848_ack_interrupt
,
90 .config_intr
= dp83848_config_intr
,
93 module_phy_driver(dp83848_driver
);
95 MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
96 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com");
97 MODULE_LICENSE("GPL");