ibm/emac/zmii.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * drivers/net/ethernet/ibm/emac/zmii.h
0004  *
0005  * Driver for PowerPC 4xx on-chip ethernet controller, ZMII 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  * Copyright (c) 2004, 2005 Zultys Technologies.
0013  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
0014  *
0015  * Based on original work by
0016  *      Armin Kuster <akuster@mvista.com>
0017  *  Copyright 2001 MontaVista Softare Inc.
0018  */
0019 #ifndef __IBM_NEWEMAC_ZMII_H
0020 #define __IBM_NEWEMAC_ZMII_H
0021
0022 /* ZMII bridge registers */
0023 struct zmii_regs {
0024     u32 fer;        /* Function enable reg */
0025     u32 ssr;        /* Speed select reg */
0026     u32 smiirs;     /* SMII status reg */
0027 };
0028
0029 /* ZMII device */
0030 struct zmii_instance {
0031     struct zmii_regs __iomem    *base;
0032
0033     /* Only one EMAC whacks us at a time */
0034     struct mutex            lock;
0035
0036     /* subset of PHY_MODE_XXXX */
0037     int             mode;
0038
0039     /* number of EMACs using this ZMII bridge */
0040     int             users;
0041
0042     /* FER value left by firmware */
0043     u32             fer_save;
0044
0045     /* OF device instance */
0046     struct platform_device      *ofdev;
0047 };
0048
0049 #ifdef CONFIG_IBM_EMAC_ZMII
0050
0051 int zmii_init(void);
0052 void zmii_exit(void);
0053 int zmii_attach(struct platform_device *ofdev, int input,
0054         phy_interface_t *mode);
0055 void zmii_detach(struct platform_device *ofdev, int input);
0056 void zmii_get_mdio(struct platform_device *ofdev, int input);
0057 void zmii_put_mdio(struct platform_device *ofdev, int input);
0058 void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
0059 int zmii_get_regs_len(struct platform_device *ocpdev);
0060 void *zmii_dump_regs(struct platform_device *ofdev, void *buf);
0061
0062 #else
0063 # define zmii_init()        0
0064 # define zmii_exit()        do { } while(0)
0065 # define zmii_attach(x,y,z) (-ENXIO)
0066 # define zmii_detach(x,y)   do { } while(0)
0067 # define zmii_get_mdio(x,y) do { } while(0)
0068 # define zmii_put_mdio(x,y) do { } while(0)
0069 # define zmii_set_speed(x,y,z)  do { } while(0)
0070 # define zmii_get_regs_len(x)   0
0071 # define zmii_dump_regs(x,buf)  (buf)
0072 #endif              /* !CONFIG_IBM_EMAC_ZMII */
0073
0074 #endif /* __IBM_NEWEMAC_ZMII_H */