drivers/net/wan/fsl_ucc_hdlc.h

   1 /* Freescale QUICC Engine HDLC Device Driver
   2  *
   3  * Copyright 2014 Freescale Semiconductor Inc.
   4  *
   5  * This program is free software; you can redistribute  it and/or modify it
   6  * under  the terms of  the GNU General  Public License as published by the
   7  * Free Software Foundation;  either version 2 of the  License, or (at your
   8  * option) any later version.
   9  */
  10
  11 #ifndef _UCC_HDLC_H_
  12 #define _UCC_HDLC_H_
  13
  14 #include <linux/kernel.h>
  15 #include <linux/list.h>
  16
  17 #include <soc/fsl/qe/immap_qe.h>
  18 #include <soc/fsl/qe/qe.h>
  19
  20 #include <soc/fsl/qe/ucc.h>
  21 #include <soc/fsl/qe/ucc_fast.h>
  22
  23 /* UCC HDLC event register */
  24 #define UCCE_HDLC_RX_EVENTS     \
  25 (UCC_HDLC_UCCE_RXF | UCC_HDLC_UCCE_RXB | UCC_HDLC_UCCE_BSY)
  26 #define UCCE_HDLC_TX_EVENTS     (UCC_HDLC_UCCE_TXB | UCC_HDLC_UCCE_TXE)
  27
  28 struct ucc_hdlc_param {
  29         __be16 riptr;
  30         __be16 tiptr;
  31         __be16 res0;
  32         __be16 mrblr;
  33         __be32 rstate;
  34         __be32 rbase;
  35         __be16 rbdstat;
  36         __be16 rbdlen;
  37         __be32 rdptr;
  38         __be32 tstate;
  39         __be32 tbase;
  40         __be16 tbdstat;
  41         __be16 tbdlen;
  42         __be32 tdptr;
  43         __be32 rbptr;
  44         __be32 tbptr;
  45         __be32 rcrc;
  46         __be32 res1;
  47         __be32 tcrc;
  48         __be32 res2;
  49         __be32 res3;
  50         __be32 c_mask;
  51         __be32 c_pres;
  52         __be16 disfc;
  53         __be16 crcec;
  54         __be16 abtsc;
  55         __be16 nmarc;
  56         __be32 max_cnt;
  57         __be16 mflr;
  58         __be16 rfthr;
  59         __be16 rfcnt;
  60         __be16 hmask;
  61         __be16 haddr1;
  62         __be16 haddr2;
  63         __be16 haddr3;
  64         __be16 haddr4;
  65         __be16 ts_tmp;
  66         __be16 tmp_mb;
  67 };
  68
  69 struct ucc_hdlc_private {
  70         struct ucc_tdm  *utdm;
  71         struct ucc_tdm_info *ut_info;
  72         struct ucc_fast_private *uccf;
  73         struct device *dev;
  74         struct net_device *ndev;
  75         struct napi_struct napi;
  76         struct ucc_fast __iomem *uf_regs;       /* UCC Fast registers */
  77         struct ucc_hdlc_param __iomem *ucc_pram;
  78         u16 tsa;
  79         bool hdlc_busy;
  80         bool loopback;
  81
  82         u8 *tx_buffer;
  83         u8 *rx_buffer;
  84         dma_addr_t dma_tx_addr;
  85         dma_addr_t dma_rx_addr;
  86
  87         struct qe_bd *tx_bd_base;
  88         struct qe_bd *rx_bd_base;
  89         dma_addr_t dma_tx_bd;
  90         dma_addr_t dma_rx_bd;
  91         struct qe_bd *curtx_bd;
  92         struct qe_bd *currx_bd;
  93         struct qe_bd *dirty_tx;
  94         u16 currx_bdnum;
  95
  96         struct sk_buff **tx_skbuff;
  97         struct sk_buff **rx_skbuff;
  98         u16 skb_curtx;
  99         u16 skb_currx;
 100         unsigned short skb_dirtytx;
 101
 102         unsigned short tx_ring_size;
 103         unsigned short rx_ring_size;
 104         u32 ucc_pram_offset;
 105
 106         unsigned short encoding;
 107         unsigned short parity;
 108         u32 clocking;
 109         spinlock_t lock;        /* lock for Tx BD and Tx buffer */
 110 #ifdef CONFIG_PM
 111         struct ucc_hdlc_param *ucc_pram_bak;
 112         u32 gumr;
 113         u8 guemr;
 114         u32 cmxsi1cr_l, cmxsi1cr_h;
 115         u32 cmxsi1syr;
 116         u32 cmxucr[4];
 117 #endif
 118 };
 119
 120 #define TX_BD_RING_LEN  0x10
 121 #define RX_BD_RING_LEN  0x20
 122 #define RX_CLEAN_MAX    0x10
 123 #define NUM_OF_BUF      4
 124 #define MAX_RX_BUF_LENGTH       (48 * 0x20)
 125 #define MAX_FRAME_LENGTH        (MAX_RX_BUF_LENGTH + 8)
 126 #define ALIGNMENT_OF_UCC_HDLC_PRAM      64
 127 #define SI_BANK_SIZE    128
 128 #define MAX_HDLC_NUM    4
 129 #define HDLC_HEAD_LEN   2
 130 #define HDLC_CRC_SIZE   2
 131 #define TX_RING_MOD_MASK(size) (size - 1)
 132 #define RX_RING_MOD_MASK(size) (size - 1)
 133
 134 #define HDLC_HEAD_MASK          0x0000
 135 #define DEFAULT_HDLC_HEAD       0xff44
 136 #define DEFAULT_ADDR_MASK       0x00ff
 137 #define DEFAULT_HDLC_ADDR       0x00ff
 138
 139 #define BMR_GBL                 0x20000000
 140 #define BMR_BIG_ENDIAN          0x10000000
 141 #define CRC_16BIT_MASK          0x0000F0B8
 142 #define CRC_16BIT_PRES          0x0000FFFF
 143 #define DEFAULT_RFTHR           1
 144
 145 #define DEFAULT_PPP_HEAD    0xff03
 146
 147 #endif