greth_regs.h

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/*
 * SPDX-FileCopyrightText: 2026 Matvii Ivashchenko
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    volatile uint32_t ctrl;     
    volatile uint32_t status;   
    volatile uint32_t mac_msb;  
    volatile uint32_t mac_lsb;  
    volatile uint32_t mdio;     
    volatile uint32_t tx_desc;  
    volatile uint32_t rx_desc;  
    volatile uint32_t edcl_ip;  
} greth_regs_t;

#define GRETH_CTRL_TXEN     (1u << 0)   
#define GRETH_CTRL_RXEN     (1u << 1)   
#define GRETH_CTRL_TXIRQEN  (1u << 2)   
#define GRETH_CTRL_RXIRQEN  (1u << 3)   
#define GRETH_CTRL_FD       (1u << 4)   
#define GRETH_CTRL_PRO      (1u << 5)   
#define GRETH_CTRL_RST      (1u << 6)   
#define GRETH_CTRL_SPD      (1u << 7)   
#define GRETH_CTRL_GB       (1u << 8)   
#define GRETH_CTRL_EDCLDIS  (1u << 14)  
#define GRETH_CTRL_GBIT_CAP (1u << 27)  
#define GRETH_CTRL_EDCL_CAP (1u << 26)  

#define GRETH_STATUS_RXERR  (1u << 0)   
#define GRETH_STATUS_TXERR  (1u << 1)   
#define GRETH_STATUS_RXIRQ  (1u << 2)   
#define GRETH_STATUS_TXIRQ  (1u << 3)   
#define GRETH_STATUS_PHYIRQ (1u << 4)   

#define GRETH_MDIO_OP_WR    (1u)                
#define GRETH_MDIO_OP_RD    (2u)                
#define GRETH_MDIO_BUSY     (1u << 3)           
#define GRETH_MDIO_NVALID   (1u << 4)           
#define GRETH_MDIO_REGSHIFT (6u)                
#define GRETH_MDIO_PHYSHIFT (11u)               
#define GRETH_MDIO_DATASHIFT (16u)              

#define GRETH_BD_LEN_MASK   (0x7FFu)    
#define GRETH_BD_EN         (1u << 11)  
#define GRETH_BD_WR         (1u << 12)  
#define GRETH_BD_IE         (1u << 13)  

#define GRETH_TXBD_ERR_UE   (1u << 14)  
#define GRETH_TXBD_ERR_AL   (1u << 15)  
#define GRETH_TXBD_ERR_LC   (1u << 16)  
#define GRETH_TXBD_ERR_MASK (GRETH_TXBD_ERR_UE | GRETH_TXBD_ERR_AL | \
                              GRETH_TXBD_ERR_LC)


#define GRETH_RXBD_ERR_AE   (1u << 14)  
#define GRETH_RXBD_ERR_FT   (1u << 15)  
#define GRETH_RXBD_ERR_CRC  (1u << 16)  
#define GRETH_RXBD_ERR_OE   (1u << 17)  
#define GRETH_RXBD_ERR_LE   (1u << 18)  
#define GRETH_RXBD_ERR_MASK (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_FT | \
                              GRETH_RXBD_ERR_CRC | GRETH_RXBD_ERR_OE | \
                              GRETH_RXBD_ERR_LE)


#define GRETH_MII_CTRL      (0)     
#define GRETH_MII_STATUS    (1)     
#define GRETH_MII_ADV       (4)     
#define GRETH_MII_LPA       (5)     
 
#define GRETH_MII_CTRL_RST      (1u << 15)  
#define GRETH_MII_CTRL_ANEG     (1u << 12)  
#define GRETH_MII_CTRL_SPD100   (1u << 13)  
#define GRETH_MII_CTRL_FD       (1u << 8)   
#define GRETH_MII_STATUS_ANEG_DONE (1u << 5) 
#define GRETH_MII_STATUS_LINK   (1u << 2)   

#define GRETH_MII_LPA_10_HD     (1u << 5)   
#define GRETH_MII_LPA_10_FD     (1u << 6)   
#define GRETH_MII_LPA_100_HD    (1u << 7)   
#define GRETH_MII_LPA_100_FD    (1u << 8)   
 
#ifdef __cplusplus
}
#endif