Gitiles
Code Review Sign In
gerrit.cesnet.cz / github / trini / u-boot / 1a4596601fd395f3afb8f82f3f840c5e00bdd57a / . / drivers / net / fm / tgec_phy.c
blob: faec317a0a5750c55d4c2f91687cc5f6a6f28b23 [file] [log] [blame]
Kumar Galac916d7c2011-04-13 08:37:44 -0500[diff] [blame]1/*
2 * Copyright 2009-2011 Freescale Semiconductor, Inc.
3 * Andy Fleming <afleming@freescale.com>
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +0200[diff] [blame^]5 * SPDX-License-Identifier: GPL-2.0+
Kumar Galac916d7c2011-04-13 08:37:44 -0500[diff] [blame]6 * Some part is taken from tsec.c
7 */
8#include <common.h>
9#include <miiphy.h>
10#include <phy.h>
11#include <asm/io.h>
12#include <asm/fsl_tgec.h>
13#include <fm_eth.h>
14
15/*
16 * Write value to the PHY for this device to the register at regnum, waiting
17 * until the write is done before it returns. All PHY configuration has to be
18 * done through the TSEC1 MIIM regs
19 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000[diff] [blame]20static int tgec_mdio_write(struct mii_dev *bus, int port_addr, int dev_addr,
21 int regnum, u16 value)
Kumar Galac916d7c2011-04-13 08:37:44 -0500[diff] [blame]22{
23 u32 mdio_ctl;
24 u32 stat_val;
25 struct tgec_mdio_controller *regs = bus->priv;
26
27 if (dev_addr == MDIO_DEVAD_NONE)
28 return 0;
29
30 /* Wait till the bus is free */
31 stat_val = MDIO_STAT_CLKDIV(100);
32 out_be32(&regs->mdio_stat, stat_val);
33 while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
34 ;
35
36 /* Set the port and dev addr */
37 mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr);
38 out_be32(&regs->mdio_ctl, mdio_ctl);
39
40 /* Set the register address */
41 out_be32(&regs->mdio_addr, regnum & 0xffff);
42
43 /* Wait till the bus is free */
44 while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
45 ;
46
47 /* Write the value to the register */
48 out_be32(&regs->mdio_data, MDIO_DATA(value));
49
50 /* Wait till the MDIO write is complete */
51 while ((in_be32(&regs->mdio_data)) & MDIO_DATA_BSY)
52 ;
53
54 return 0;
55}
56
57/*
58 * Reads from register regnum in the PHY for device dev, returning the value.
59 * Clears miimcom first. All PHY configuration has to be done through the
60 * TSEC1 MIIM regs
61 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000[diff] [blame]62static int tgec_mdio_read(struct mii_dev *bus, int port_addr, int dev_addr,
63 int regnum)
Kumar Galac916d7c2011-04-13 08:37:44 -0500[diff] [blame]64{
65 u32 mdio_ctl;
66 u32 stat_val;
67 struct tgec_mdio_controller *regs = bus->priv;
68
69 if (dev_addr == MDIO_DEVAD_NONE)
70 return 0xffff;
71
72 stat_val = MDIO_STAT_CLKDIV(100);
73 out_be32(&regs->mdio_stat, stat_val);
74 /* Wait till the bus is free */
75 while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
76 ;
77
78 /* Set the Port and Device Addrs */
79 mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr);
80 out_be32(&regs->mdio_ctl, mdio_ctl);
81
82 /* Set the register address */
83 out_be32(&regs->mdio_addr, regnum & 0xffff);
84
85 /* Wait till the bus is free */
86 while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
87 ;
88
89 /* Initiate the read */
90 mdio_ctl |= MDIO_CTL_READ;
91 out_be32(&regs->mdio_ctl, mdio_ctl);
92
93 /* Wait till the MDIO write is complete */
94 while ((in_be32(&regs->mdio_data)) & MDIO_DATA_BSY)
95 ;
96
97 /* Return all Fs if nothing was there */
98 if (in_be32(&regs->mdio_stat) & MDIO_STAT_RD_ER)
99 return 0xffff;
100
101 return in_be32(&regs->mdio_data) & 0xffff;
102}
103
Kim Phillips960d70c2012-10-29 13:34:34 +0000[diff] [blame]104static int tgec_mdio_reset(struct mii_dev *bus)
Kumar Galac916d7c2011-04-13 08:37:44 -0500[diff] [blame]105{
106 return 0;
107}
108
109int fm_tgec_mdio_init(bd_t *bis, struct tgec_mdio_info *info)
110{
111 struct mii_dev *bus = mdio_alloc();
112
113 if (!bus) {
114 printf("Failed to allocate FM TGEC MDIO bus\n");
115 return -1;
116 }
117
118 bus->read = tgec_mdio_read;
119 bus->write = tgec_mdio_write;
120 bus->reset = tgec_mdio_reset;
121 sprintf(bus->name, info->name);
122
123 bus->priv = info->regs;
124
125 return mdio_register(bus);
126}