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 u32 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 146