]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/net/phy/bcm-cygnus.c
Merge remote-tracking branch 'sound-current/for-linus'
[karo-tx-linux.git] / drivers / net / phy / bcm-cygnus.c
1 /*
2  * Copyright (C) 2015 Broadcom Corporation
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License as
6  * published by the Free Software Foundation version 2.
7  *
8  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
9  * kind, whether express or implied; without even the implied warranty
10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  */
13
14 /* Broadcom Cygnus SoC internal transceivers support. */
15 #include "bcm-phy-lib.h"
16 #include <linux/brcmphy.h>
17 #include <linux/module.h>
18 #include <linux/netdevice.h>
19 #include <linux/phy.h>
20
21 /* Broadcom Cygnus Phy specific registers */
22 #define MII_BCM_CYGNUS_AFE_VDAC_ICTRL_0  0x91E5 /* VDAL Control register */
23
24 static int bcm_cygnus_afe_config(struct phy_device *phydev)
25 {
26         int rc;
27
28         /* ensure smdspclk is enabled */
29         rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, 0x0c30);
30         if (rc < 0)
31                 return rc;
32
33         /* AFE_VDAC_ICTRL_0 bit 7:4 Iq=1100 for 1g 10bt, normal modes */
34         rc = bcm_phy_write_misc(phydev, 0x39, 0x01, 0xA7C8);
35         if (rc < 0)
36                 return rc;
37
38         /* AFE_HPF_TRIM_OTHERS bit11=1, short cascode enable for all modes*/
39         rc = bcm_phy_write_misc(phydev, 0x3A, 0x00, 0x0803);
40         if (rc < 0)
41                 return rc;
42
43         /* AFE_TX_CONFIG_1 bit 7:4 Iq=1100 for test modes */
44         rc = bcm_phy_write_misc(phydev, 0x3A, 0x01, 0xA740);
45         if (rc < 0)
46                 return rc;
47
48         /* AFE TEMPSEN_OTHERS rcal_HT, rcal_LT 10000 */
49         rc = bcm_phy_write_misc(phydev, 0x3A, 0x03, 0x8400);
50         if (rc < 0)
51                 return rc;
52
53         /* AFE_FUTURE_RSV bit 2:0 rccal <2:0>=100 */
54         rc = bcm_phy_write_misc(phydev, 0x3B, 0x00, 0x0004);
55         if (rc < 0)
56                 return rc;
57
58         /* Adjust bias current trim to overcome digital offSet */
59         rc = phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x02);
60         if (rc < 0)
61                 return rc;
62
63         /* make rcal=100, since rdb default is 000 */
64         rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB1, 0x10);
65         if (rc < 0)
66                 return rc;
67
68         /* CORE_EXPB0, Reset R_CAL/RC_CAL Engine */
69         rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB0, 0x10);
70         if (rc < 0)
71                 return rc;
72
73         /* CORE_EXPB0, Disable Reset R_CAL/RC_CAL Engine */
74         rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB0, 0x00);
75
76         return 0;
77 }
78
79 static int bcm_cygnus_config_init(struct phy_device *phydev)
80 {
81         int reg, rc;
82
83         reg = phy_read(phydev, MII_BCM54XX_ECR);
84         if (reg < 0)
85                 return reg;
86
87         /* Mask interrupts globally. */
88         reg |= MII_BCM54XX_ECR_IM;
89         rc = phy_write(phydev, MII_BCM54XX_ECR, reg);
90         if (rc)
91                 return rc;
92
93         /* Unmask events of interest */
94         reg = ~(MII_BCM54XX_INT_DUPLEX |
95                 MII_BCM54XX_INT_SPEED |
96                 MII_BCM54XX_INT_LINK);
97         rc = phy_write(phydev, MII_BCM54XX_IMR, reg);
98         if (rc)
99                 return rc;
100
101         /* Apply AFE settings for the PHY */
102         rc = bcm_cygnus_afe_config(phydev);
103         if (rc)
104                 return rc;
105
106         /* Advertise EEE */
107         rc = bcm_phy_enable_eee(phydev);
108         if (rc)
109                 return rc;
110
111         /* Enable APD */
112         return bcm_phy_enable_apd(phydev, false);
113 }
114
115 static int bcm_cygnus_resume(struct phy_device *phydev)
116 {
117         int rc;
118
119         genphy_resume(phydev);
120
121         /* Re-initialize the PHY to apply AFE work-arounds and
122          * configurations when coming out of suspend.
123          */
124         rc = bcm_cygnus_config_init(phydev);
125         if (rc)
126                 return rc;
127
128         /* restart auto negotiation with the new settings */
129         return genphy_config_aneg(phydev);
130 }
131
132 static struct phy_driver bcm_cygnus_phy_driver[] = {
133 {
134         .phy_id        = PHY_ID_BCM_CYGNUS,
135         .phy_id_mask   = 0xfffffff0,
136         .name          = "Broadcom Cygnus PHY",
137         .features      = PHY_GBIT_FEATURES |
138                         SUPPORTED_Pause | SUPPORTED_Asym_Pause,
139         .config_init   = bcm_cygnus_config_init,
140         .config_aneg   = genphy_config_aneg,
141         .read_status   = genphy_read_status,
142         .ack_interrupt = bcm_phy_ack_intr,
143         .config_intr   = bcm_phy_config_intr,
144         .suspend       = genphy_suspend,
145         .resume        = bcm_cygnus_resume,
146 } };
147
148 static struct mdio_device_id __maybe_unused bcm_cygnus_phy_tbl[] = {
149         { PHY_ID_BCM_CYGNUS, 0xfffffff0, },
150         { }
151 };
152 MODULE_DEVICE_TABLE(mdio, bcm_cygnus_phy_tbl);
153
154 module_phy_driver(bcm_cygnus_phy_driver);
155
156 MODULE_DESCRIPTION("Broadcom Cygnus internal PHY driver");
157 MODULE_LICENSE("GPL v2");
158 MODULE_AUTHOR("Broadcom Corporation");