drivers/net/wan/fsl_ucc_hdlc.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* Freescale QUICC Engine HDLC Device Driver
   3  *
   4  * Copyright 2014 Freescale Semiconductor Inc.
   5  */
   6
   7 #ifndef _UCC_HDLC_H_
   8 #define _UCC_HDLC_H_
   9
  10 #include <linux/kernel.h>
  11 #include <linux/list.h>
  12
  13 #include <soc/fsl/qe/immap_qe.h>
  14 #include <soc/fsl/qe/qe.h>
  15
  16 #include <soc/fsl/qe/ucc.h>
  17 #include <soc/fsl/qe/ucc_fast.h>
  18
  19 /* UCC HDLC event register */
  20 #define UCCE_HDLC_RX_EVENTS     \
  21 (UCC_HDLC_UCCE_RXF | UCC_HDLC_UCCE_RXB | UCC_HDLC_UCCE_BSY)
  22 #define UCCE_HDLC_TX_EVENTS     (UCC_HDLC_UCCE_TXB | UCC_HDLC_UCCE_TXE)
  23
  24 struct ucc_hdlc_param {
  25         __be16 riptr;
  26         __be16 tiptr;
  27         __be16 res0;
  28         __be16 mrblr;
  29         __be32 rstate;
  30         __be32 rbase;
  31         __be16 rbdstat;
  32         __be16 rbdlen;
  33         __be32 rdptr;
  34         __be32 tstate;
  35         __be32 tbase;
  36         __be16 tbdstat;
  37         __be16 tbdlen;
  38         __be32 tdptr;
  39         __be32 rbptr;
  40         __be32 tbptr;
  41         __be32 rcrc;
  42         __be32 res1;
  43         __be32 tcrc;
  44         __be32 res2;
  45         __be32 res3;
  46         __be32 c_mask;
  47         __be32 c_pres;
  48         __be16 disfc;
  49         __be16 crcec;
  50         __be16 abtsc;
  51         __be16 nmarc;
  52         __be32 max_cnt;
  53         __be16 mflr;
  54         __be16 rfthr;
  55         __be16 rfcnt;
  56         __be16 hmask;
  57         __be16 haddr1;
  58         __be16 haddr2;
  59         __be16 haddr3;
  60         __be16 haddr4;
  61         __be16 ts_tmp;
  62         __be16 tmp_mb;
  63 };
  64
  65 struct ucc_hdlc_private {
  66         struct ucc_tdm  *utdm;
  67         struct ucc_tdm_info *ut_info;
  68         struct ucc_fast_private *uccf;
  69         struct device *dev;
  70         struct net_device *ndev;
  71         struct napi_struct napi;
  72         struct ucc_fast __iomem *uf_regs;       /* UCC Fast registers */
  73         struct ucc_hdlc_param __iomem *ucc_pram;
  74         u16 tsa;
  75         bool hdlc_busy;
  76         bool loopback;
  77         bool hdlc_bus;
  78
  79         u8 *tx_buffer;
  80         u8 *rx_buffer;
  81         dma_addr_t dma_tx_addr;
  82         dma_addr_t dma_rx_addr;
  83
  84         struct qe_bd *tx_bd_base;
  85         struct qe_bd *rx_bd_base;
  86         dma_addr_t dma_tx_bd;
  87         dma_addr_t dma_rx_bd;
  88         struct qe_bd *curtx_bd;
  89         struct qe_bd *currx_bd;
  90         struct qe_bd *dirty_tx;
  91         u16 currx_bdnum;
  92
  93         struct sk_buff **tx_skbuff;
  94         struct sk_buff **rx_skbuff;
  95         u16 skb_curtx;
  96         u16 skb_currx;
  97         unsigned short skb_dirtytx;
  98
  99         unsigned short tx_ring_size;
 100         unsigned short rx_ring_size;
 101         s32 ucc_pram_offset;
 102
 103         unsigned short encoding;
 104         unsigned short parity;
 105         unsigned short hmask;
 106         u32 clocking;
 107         spinlock_t lock;        /* lock for Tx BD and Tx buffer */
 108 #ifdef CONFIG_PM
 109         struct ucc_hdlc_param *ucc_pram_bak;
 110         u32 gumr;
 111         u8 guemr;
 112         u32 cmxsi1cr_l, cmxsi1cr_h;
 113         u32 cmxsi1syr;
 114         u32 cmxucr[4];
 115 #endif
 116 };
 117
 118 #define TX_BD_RING_LEN  0x10
 119 #define RX_BD_RING_LEN  0x20
 120 #define RX_CLEAN_MAX    0x10
 121 #define NUM_OF_BUF      4
 122 #define MAX_RX_BUF_LENGTH       (48 * 0x20)
 123 #define MAX_FRAME_LENGTH        (MAX_RX_BUF_LENGTH + 8)
 124 #define ALIGNMENT_OF_UCC_HDLC_PRAM      64
 125 #define SI_BANK_SIZE    128
 126 #define MAX_HDLC_NUM    4
 127 #define HDLC_HEAD_LEN   2
 128 #define HDLC_CRC_SIZE   2
 129 #define TX_RING_MOD_MASK(size) (size - 1)
 130 #define RX_RING_MOD_MASK(size) (size - 1)
 131
 132 #define HDLC_HEAD_MASK          0x0000
 133 #define DEFAULT_HDLC_HEAD       0xff44
 134 #define DEFAULT_ADDR_MASK       0x00ff
 135 #define DEFAULT_HDLC_ADDR       0x00ff
 136
 137 #define BMR_GBL                 0x20000000
 138 #define BMR_BIG_ENDIAN          0x10000000
 139 #define CRC_16BIT_MASK          0x0000F0B8
 140 #define CRC_16BIT_PRES          0x0000FFFF
 141 #define DEFAULT_RFTHR           1
 142
 143 #define DEFAULT_PPP_HEAD    0xff03
 144
 145 #endif