ibm/emac/rgmii.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * drivers/net/ethernet/ibm/emac/rgmii.h
0004  *
0005  * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
0006  *
0007  * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
0008  *                <benh@kernel.crashing.org>
0009  *
0010  * Based on the arch/ppc version of the driver:
0011  *
0012  * Based on ocp_zmii.h/ibm_emac_zmii.h
0013  * Armin Kuster akuster@mvista.com
0014  *
0015  * Copyright 2004 MontaVista Software, Inc.
0016  * Matt Porter <mporter@kernel.crashing.org>
0017  *
0018  * Copyright (c) 2004, 2005 Zultys Technologies.
0019  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
0020  */
0021
0022 #ifndef __IBM_NEWEMAC_RGMII_H
0023 #define __IBM_NEWEMAC_RGMII_H
0024
0025 /* RGMII bridge type */
0026 #define RGMII_STANDARD      0
0027 #define RGMII_AXON      1
0028
0029 /* RGMII bridge */
0030 struct rgmii_regs {
0031     u32 fer;        /* Function enable register */
0032     u32 ssr;        /* Speed select register */
0033 };
0034
0035 /* RGMII device */
0036 struct rgmii_instance {
0037     struct rgmii_regs __iomem   *base;
0038
0039     /* RGMII bridge flags */
0040     int             flags;
0041 #define EMAC_RGMII_FLAG_HAS_MDIO    0x00000001
0042
0043     /* Only one EMAC whacks us at a time */
0044     struct mutex            lock;
0045
0046     /* number of EMACs using this RGMII bridge */
0047     int             users;
0048
0049     /* OF device instance */
0050     struct platform_device      *ofdev;
0051 };
0052
0053 #ifdef CONFIG_IBM_EMAC_RGMII
0054
0055 int rgmii_init(void);
0056 void rgmii_exit(void);
0057 int rgmii_attach(struct platform_device *ofdev, int input, int mode);
0058 void rgmii_detach(struct platform_device *ofdev, int input);
0059 void rgmii_get_mdio(struct platform_device *ofdev, int input);
0060 void rgmii_put_mdio(struct platform_device *ofdev, int input);
0061 void rgmii_set_speed(struct platform_device *ofdev, int input, int speed);
0062 int rgmii_get_regs_len(struct platform_device *ofdev);
0063 void *rgmii_dump_regs(struct platform_device *ofdev, void *buf);
0064
0065 #else
0066
0067 # define rgmii_init()       0
0068 # define rgmii_exit()       do { } while(0)
0069 # define rgmii_attach(x,y,z)    (-ENXIO)
0070 # define rgmii_detach(x,y)  do { } while(0)
0071 # define rgmii_get_mdio(o,i)    do { } while (0)
0072 # define rgmii_put_mdio(o,i)    do { } while (0)
0073 # define rgmii_set_speed(x,y,z) do { } while(0)
0074 # define rgmii_get_regs_len(x)  0
0075 # define rgmii_dump_regs(x,buf) (buf)
0076 #endif              /* !CONFIG_IBM_EMAC_RGMII */
0077
0078 #endif /* __IBM_NEWEMAC_RGMII_H */