| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * drivers/net/ethernet/ibm/emac/zmii.h |
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| 4 | * |
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| 5 | * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support. |
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| 6 | * |
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| 7 | * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. |
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| 8 | * <benh@kernel.crashing.org> |
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| 9 | * |
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| 10 | * Based on the arch/ppc version of the driver: |
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| 11 | * |
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| 12 | * Copyright (c) 2004, 2005 Zultys Technologies. |
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| 13 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> |
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| 14 | * |
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| 15 | * Based on original work by |
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| 16 | * Armin Kuster <akuster@mvista.com> |
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| 17 | * Copyright 2001 MontaVista Softare Inc. |
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| 18 | */ |
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| 19 | #ifndef __IBM_NEWEMAC_ZMII_H |
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| 20 | #define __IBM_NEWEMAC_ZMII_H |
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| 21 | |
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| 22 | /* ZMII bridge registers */ |
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| 23 | struct zmii_regs { |
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| 24 | u32 fer; /* Function enable reg */ |
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| 25 | u32 ssr; /* Speed select reg */ |
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| 26 | u32 smiirs; /* SMII status reg */ |
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| 27 | }; |
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| 28 | |
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| 29 | /* ZMII device */ |
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| 30 | struct zmii_instance { |
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| 31 | struct zmii_regs __iomem *base; |
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| 32 | |
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| 33 | /* Only one EMAC whacks us at a time */ |
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| 34 | struct mutex lock; |
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| 35 | |
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| 36 | /* subset of PHY_MODE_XXXX */ |
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| 37 | int mode; |
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| 38 | |
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| 39 | /* number of EMACs using this ZMII bridge */ |
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| 40 | int users; |
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| 41 | |
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| 42 | /* FER value left by firmware */ |
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| 43 | u32 fer_save; |
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| 44 | |
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| 45 | /* OF device instance */ |
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| 46 | struct platform_device *ofdev; |
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| 47 | }; |
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| 48 | |
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| 49 | #ifdef CONFIG_IBM_EMAC_ZMII |
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| 50 | |
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| 51 | int zmii_init(void); |
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| 52 | void zmii_exit(void); |
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| 53 | int zmii_attach(struct platform_device *ofdev, int input, |
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| 54 | phy_interface_t *mode); |
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| 55 | void zmii_detach(struct platform_device *ofdev, int input); |
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| 56 | void zmii_get_mdio(struct platform_device *ofdev, int input); |
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| 57 | void zmii_put_mdio(struct platform_device *ofdev, int input); |
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| 58 | void zmii_set_speed(struct platform_device *ofdev, int input, int speed); |
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| 59 | int zmii_get_regs_len(struct platform_device *ocpdev); |
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| 60 | void *zmii_dump_regs(struct platform_device *ofdev, void *buf); |
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| 61 | |
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| 62 | #else |
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| 63 | # define zmii_init() 0 |
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| 64 | # define zmii_exit() do { } while(0) |
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| 65 | # define zmii_attach(x,y,z) (-ENXIO) |
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| 66 | # define zmii_detach(x,y) do { } while(0) |
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| 67 | # define zmii_get_mdio(x,y) do { } while(0) |
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| 68 | # define zmii_put_mdio(x,y) do { } while(0) |
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| 69 | # define zmii_set_speed(x,y,z) do { } while(0) |
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| 70 | # define zmii_get_regs_len(x) 0 |
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| 71 | # define zmii_dump_regs(x,buf) (buf) |
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| 72 | #endif /* !CONFIG_IBM_EMAC_ZMII */ |
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| 73 | |
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| 74 | #endif /* __IBM_NEWEMAC_ZMII_H */ |
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| 75 | |
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