1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * drivers/net/ethernet/ibm/emac/zmii.h 4 * 5 * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support. 6 * 7 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. 8 * <benh@kernel.crashing.org> 9 * 10 * Based on the arch/ppc version of the driver: 11 * 12 * Copyright (c) 2004, 2005 Zultys Technologies. 13 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> 14 * 15 * Based on original work by 16 * Armin Kuster <akuster@mvista.com> 17 * Copyright 2001 MontaVista Softare Inc. 18 */ 19 #ifndef __IBM_NEWEMAC_ZMII_H 20 #define __IBM_NEWEMAC_ZMII_H 21 22 /* ZMII bridge registers */ 23 struct zmii_regs { 24 u32 fer; /* Function enable reg */ 25 u32 ssr; /* Speed select reg */ 26 u32 smiirs; /* SMII status reg */ 27 }; 28 29 /* ZMII device */ 30 struct zmii_instance { 31 struct zmii_regs __iomem *base; 32 33 /* Only one EMAC whacks us at a time */ 34 struct mutex lock; 35 36 /* subset of PHY_MODE_XXXX */ 37 int mode; 38 39 /* number of EMACs using this ZMII bridge */ 40 int users; 41 42 /* FER value left by firmware */ 43 u32 fer_save; 44 45 /* OF device instance */ 46 struct platform_device *ofdev; 47 }; 48 49 #ifdef CONFIG_IBM_EMAC_ZMII 50 51 int zmii_init(void); 52 void zmii_exit(void); 53 int zmii_attach(struct platform_device *ofdev, int input, int *mode); 54 void zmii_detach(struct platform_device *ofdev, int input); 55 void zmii_get_mdio(struct platform_device *ofdev, int input); 56 void zmii_put_mdio(struct platform_device *ofdev, int input); 57 void zmii_set_speed(struct platform_device *ofdev, int input, int speed); 58 int zmii_get_regs_len(struct platform_device *ocpdev); 59 void *zmii_dump_regs(struct platform_device *ofdev, void *buf); 60 61 #else 62 # define zmii_init() 0 63 # define zmii_exit() do { } while(0) 64 # define zmii_attach(x,y,z) (-ENXIO) 65 # define zmii_detach(x,y) do { } while(0) 66 # define zmii_get_mdio(x,y) do { } while(0) 67 # define zmii_put_mdio(x,y) do { } while(0) 68 # define zmii_set_speed(x,y,z) do { } while(0) 69 # define zmii_get_regs_len(x) 0 70 # define zmii_dump_regs(x,buf) (buf) 71 #endif /* !CONFIG_IBM_EMAC_ZMII */ 72 73 #endif /* __IBM_NEWEMAC_ZMII_H */ 74