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1/*
2 * Driver for the Texas Instruments DP83848 PHY
3 *
4 * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
5 *
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.
9 *
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.
14 */
15
16#include <linux/module.h>
17#include <linux/phy.h>
18
19#define TI_DP83848C_PHY_ID 0x20005ca0
20#define TI_DP83620_PHY_ID 0x20005ce0
21#define NS_DP83848C_PHY_ID 0x20005c90
22#define TLK10X_PHY_ID 0x2000a210
23
24/* Registers */
25#define DP83848_MICR 0x11 /* MII Interrupt Control Register */
26#define DP83848_MISR 0x12 /* MII Interrupt Status Register */
27
28/* MICR Register Fields */
29#define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
30#define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
31
32/* MISR Register Fields */
33#define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
34#define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
35#define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
36#define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
37#define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
38#define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
39#define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
40#define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
41
42#define DP83848_INT_EN_MASK \
43 (DP83848_MISR_ANC_INT_EN | \
44 DP83848_MISR_DUP_INT_EN | \
45 DP83848_MISR_SPD_INT_EN | \
46 DP83848_MISR_LINK_INT_EN)
47
48static int dp83848_ack_interrupt(struct phy_device *phydev)
49{
50 int err = phy_read(phydev, DP83848_MISR);
51
52 return err < 0 ? err : 0;
53}
54
55static int dp83848_config_intr(struct phy_device *phydev)
56{
57 int control, ret;
58
59 control = phy_read(phydev, DP83848_MICR);
60 if (control < 0)
61 return control;
62
63 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
64 control |= DP83848_MICR_INT_OE;
65 control |= DP83848_MICR_INTEN;
66
67 ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
68 if (ret < 0)
69 return ret;
70 } else {
71 control &= ~DP83848_MICR_INTEN;
72 }
73
74 return phy_write(phydev, DP83848_MICR, control);
75}
76
77static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
78 { TI_DP83848C_PHY_ID, 0xfffffff0 },
79 { NS_DP83848C_PHY_ID, 0xfffffff0 },
80 { TI_DP83620_PHY_ID, 0xfffffff0 },
81 { TLK10X_PHY_ID, 0xfffffff0 },
82 { }
83};
84MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
85
86#define DP83848_PHY_DRIVER(_id, _name) \
87 { \
88 .phy_id = _id, \
89 .phy_id_mask = 0xfffffff0, \
90 .name = _name, \
91 .features = PHY_BASIC_FEATURES, \
92 .flags = PHY_HAS_INTERRUPT, \
93 \
94 .soft_reset = genphy_soft_reset, \
95 .config_init = genphy_config_init, \
96 .suspend = genphy_suspend, \
97 .resume = genphy_resume, \
98 \
99 /* IRQ related */ \
100 .ack_interrupt = dp83848_ack_interrupt, \
101 .config_intr = dp83848_config_intr, \
102 }
103
104static struct phy_driver dp83848_driver[] = {
105 DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY"),
106 DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY"),
107 DP83848_PHY_DRIVER(TI_DP83620_PHY_ID, "TI DP83620 10/100 Mbps PHY"),
108 DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY"),
109};
110module_phy_driver(dp83848_driver);
111
112MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
113MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
114MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Driver for the Texas Instruments DP83848 PHY
4 *
5 * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
6 */
7
8#include <linux/module.h>
9#include <linux/phy.h>
10
11#define TI_DP83848C_PHY_ID 0x20005ca0
12#define TI_DP83620_PHY_ID 0x20005ce0
13#define NS_DP83848C_PHY_ID 0x20005c90
14#define TLK10X_PHY_ID 0x2000a210
15
16/* Registers */
17#define DP83848_MICR 0x11 /* MII Interrupt Control Register */
18#define DP83848_MISR 0x12 /* MII Interrupt Status Register */
19
20/* MICR Register Fields */
21#define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
22#define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
23
24/* MISR Register Fields */
25#define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
26#define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
27#define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
28#define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
29#define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
30#define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
31#define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
32#define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
33
34#define DP83848_INT_EN_MASK \
35 (DP83848_MISR_ANC_INT_EN | \
36 DP83848_MISR_DUP_INT_EN | \
37 DP83848_MISR_SPD_INT_EN | \
38 DP83848_MISR_LINK_INT_EN)
39
40static int dp83848_ack_interrupt(struct phy_device *phydev)
41{
42 int err = phy_read(phydev, DP83848_MISR);
43
44 return err < 0 ? err : 0;
45}
46
47static int dp83848_config_intr(struct phy_device *phydev)
48{
49 int control, ret;
50
51 control = phy_read(phydev, DP83848_MICR);
52 if (control < 0)
53 return control;
54
55 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
56 control |= DP83848_MICR_INT_OE;
57 control |= DP83848_MICR_INTEN;
58
59 ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
60 if (ret < 0)
61 return ret;
62 } else {
63 control &= ~DP83848_MICR_INTEN;
64 }
65
66 return phy_write(phydev, DP83848_MICR, control);
67}
68
69static int dp83848_config_init(struct phy_device *phydev)
70{
71 int val;
72
73 /* DP83620 always reports Auto Negotiation Ability on BMSR. Instead,
74 * we check initial value of BMCR Auto negotiation enable bit
75 */
76 val = phy_read(phydev, MII_BMCR);
77 if (!(val & BMCR_ANENABLE))
78 phydev->autoneg = AUTONEG_DISABLE;
79
80 return 0;
81}
82
83static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
84 { TI_DP83848C_PHY_ID, 0xfffffff0 },
85 { NS_DP83848C_PHY_ID, 0xfffffff0 },
86 { TI_DP83620_PHY_ID, 0xfffffff0 },
87 { TLK10X_PHY_ID, 0xfffffff0 },
88 { }
89};
90MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
91
92#define DP83848_PHY_DRIVER(_id, _name, _config_init) \
93 { \
94 .phy_id = _id, \
95 .phy_id_mask = 0xfffffff0, \
96 .name = _name, \
97 /* PHY_BASIC_FEATURES */ \
98 \
99 .soft_reset = genphy_soft_reset, \
100 .config_init = _config_init, \
101 .suspend = genphy_suspend, \
102 .resume = genphy_resume, \
103 \
104 /* IRQ related */ \
105 .ack_interrupt = dp83848_ack_interrupt, \
106 .config_intr = dp83848_config_intr, \
107 }
108
109static struct phy_driver dp83848_driver[] = {
110 DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY",
111 NULL),
112 DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY",
113 NULL),
114 DP83848_PHY_DRIVER(TI_DP83620_PHY_ID, "TI DP83620 10/100 Mbps PHY",
115 dp83848_config_init),
116 DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY",
117 NULL),
118};
119module_phy_driver(dp83848_driver);
120
121MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
122MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
123MODULE_LICENSE("GPL v2");