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1 /*
2  * Intel LXT971/LXT972 PHY Driver for TI DaVinci
3  * (TMS320DM644x) based boards.
4  *
5  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
6  *
7  * --------------------------------------------------------
8  *
9  * SPDX-License-Identifier:     GPL-2.0+
10  */
11
12 #include <common.h>
13 #include <net.h>
14 #include <miiphy.h>
15 #include <lxt971a.h>
16 #include <asm/arch/emac_defs.h>
17 #include "../../../drivers/net/davinci_emac.h"
18
19 #ifdef CONFIG_DRIVER_TI_EMAC
20
21 #ifdef CONFIG_CMD_NET
22
23 int lxt972_is_phy_connected(int phy_addr)
24 {
25         u_int16_t id1, id2;
26
27         if (!davinci_eth_phy_read(phy_addr, MII_PHYSID1, &id1))
28                 return(0);
29         if (!davinci_eth_phy_read(phy_addr, MII_PHYSID2, &id2))
30                 return(0);
31
32         if ((id1 == (0x0013)) && ((id2  & 0xfff0) == 0x78e0))
33                 return(1);
34
35         return(0);
36 }
37
38 int lxt972_get_link_speed(int phy_addr)
39 {
40         u_int16_t stat1, tmp;
41         volatile emac_regs *emac = (emac_regs *)EMAC_BASE_ADDR;
42
43         if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_STAT2, &stat1))
44                 return(0);
45
46         if (!(stat1 & PHY_LXT971_STAT2_LINK))   /* link up? */
47                 return(0);
48
49         if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_DIG_CFG, &tmp))
50                 return(0);
51
52         tmp |= PHY_LXT971_DIG_CFG_MII_DRIVE;
53
54         davinci_eth_phy_write(phy_addr, PHY_LXT971_DIG_CFG, tmp);
55         /* Read back */
56         if (!davinci_eth_phy_read(phy_addr, PHY_LXT971_DIG_CFG, &tmp))
57                 return(0);
58
59         /* Speed doesn't matter, there is no setting for it in EMAC... */
60         if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
61                 /* set DM644x EMAC for Full Duplex  */
62                 emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE |
63                         EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
64         } else {
65                 /*set DM644x EMAC for Half Duplex  */
66                 emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE;
67         }
68
69         return(1);
70 }
71
72
73 int lxt972_init_phy(int phy_addr)
74 {
75         int ret = 1;
76
77         if (!lxt972_get_link_speed(phy_addr)) {
78                 /* Try another time */
79                 ret = lxt972_get_link_speed(phy_addr);
80         }
81
82         /* Disable PHY Interrupts */
83         davinci_eth_phy_write(phy_addr, PHY_LXT971_INT_ENABLE, 0);
84
85         return(ret);
86 }
87
88
89 int lxt972_auto_negotiate(int phy_addr)
90 {
91         u_int16_t tmp;
92
93         if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp))
94                 return(0);
95
96         /* Restart Auto_negotiation  */
97         tmp |= BMCR_ANRESTART;
98         davinci_eth_phy_write(phy_addr, MII_BMCR, tmp);
99
100         /*check AutoNegotiate complete */
101         udelay (10000);
102         if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp))
103                 return(0);
104
105         if (!(tmp & BMSR_ANEGCOMPLETE))
106                 return(0);
107
108         return (lxt972_get_link_speed(phy_addr));
109 }
110
111 #endif  /* CONFIG_CMD_NET */
112
113 #endif  /* CONFIG_DRIVER_ETHER */