1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Internal header file for UCC FAST unit routines. 4 * 5 * Copyright (C) 2006 Freescale Semiconductor, Inc. All rights reserved. 6 * 7 * Authors: Shlomi Gridish <gridish@freescale.com> 8 * Li Yang <leoli@freescale.com> 9 */ 10 #ifndef __UCC_FAST_H__ 11 #define __UCC_FAST_H__ 12 13 #include <linux/kernel.h> 14 15 #include <soc/fsl/qe/immap_qe.h> 16 #include <soc/fsl/qe/qe.h> 17 18 #include <soc/fsl/qe/ucc.h> 19 20 /* Receive BD's status and length*/ 21 #define R_E 0x80000000 /* buffer empty */ 22 #define R_W 0x20000000 /* wrap bit */ 23 #define R_I 0x10000000 /* interrupt on reception */ 24 #define R_L 0x08000000 /* last */ 25 #define R_F 0x04000000 /* first */ 26 27 /* transmit BD's status and length*/ 28 #define T_R 0x80000000 /* ready bit */ 29 #define T_W 0x20000000 /* wrap bit */ 30 #define T_I 0x10000000 /* interrupt on completion */ 31 #define T_L 0x08000000 /* last */ 32 33 /* Receive BD's status */ 34 #define R_E_S 0x8000 /* buffer empty */ 35 #define R_W_S 0x2000 /* wrap bit */ 36 #define R_I_S 0x1000 /* interrupt on reception */ 37 #define R_L_S 0x0800 /* last */ 38 #define R_F_S 0x0400 /* first */ 39 #define R_CM_S 0x0200 /* continuous mode */ 40 #define R_LG_S 0x0020 /* frame length */ 41 #define R_NO_S 0x0010 /* nonoctet */ 42 #define R_AB_S 0x0008 /* abort */ 43 #define R_CR_S 0x0004 /* crc */ 44 #define R_OV_S 0x0002 /* overrun */ 45 #define R_CD_S 0x0001 /* carrier detect */ 46 47 /* transmit BD's status */ 48 #define T_R_S 0x8000 /* ready bit */ 49 #define T_W_S 0x2000 /* wrap bit */ 50 #define T_I_S 0x1000 /* interrupt on completion */ 51 #define T_L_S 0x0800 /* last */ 52 #define T_TC_S 0x0400 /* crc */ 53 #define T_TM_S 0x0200 /* continuous mode */ 54 #define T_UN_S 0x0002 /* hdlc underrun */ 55 #define T_CT_S 0x0001 /* hdlc carrier lost */ 56 57 /* Rx Data buffer must be 4 bytes aligned in most cases */ 58 #define UCC_FAST_RX_ALIGN 4 59 #define UCC_FAST_MRBLR_ALIGNMENT 4 60 #define UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT 8 61 62 /* Sizes */ 63 #define UCC_FAST_URFS_MIN_VAL 0x88 64 #define UCC_FAST_RECEIVE_VIRTUAL_FIFO_SIZE_FUDGE_FACTOR 8 65 66 /* ucc_fast_channel_protocol_mode - UCC FAST mode */ 67 enum ucc_fast_channel_protocol_mode { 68 UCC_FAST_PROTOCOL_MODE_HDLC = 0x00000000, 69 UCC_FAST_PROTOCOL_MODE_RESERVED01 = 0x00000001, 70 UCC_FAST_PROTOCOL_MODE_RESERVED_QMC = 0x00000002, 71 UCC_FAST_PROTOCOL_MODE_RESERVED02 = 0x00000003, 72 UCC_FAST_PROTOCOL_MODE_RESERVED_UART = 0x00000004, 73 UCC_FAST_PROTOCOL_MODE_RESERVED03 = 0x00000005, 74 UCC_FAST_PROTOCOL_MODE_RESERVED_EX_MAC_1 = 0x00000006, 75 UCC_FAST_PROTOCOL_MODE_RESERVED_EX_MAC_2 = 0x00000007, 76 UCC_FAST_PROTOCOL_MODE_RESERVED_BISYNC = 0x00000008, 77 UCC_FAST_PROTOCOL_MODE_RESERVED04 = 0x00000009, 78 UCC_FAST_PROTOCOL_MODE_ATM = 0x0000000A, 79 UCC_FAST_PROTOCOL_MODE_RESERVED05 = 0x0000000B, 80 UCC_FAST_PROTOCOL_MODE_ETHERNET = 0x0000000C, 81 UCC_FAST_PROTOCOL_MODE_RESERVED06 = 0x0000000D, 82 UCC_FAST_PROTOCOL_MODE_POS = 0x0000000E, 83 UCC_FAST_PROTOCOL_MODE_RESERVED07 = 0x0000000F 84 }; 85 86 /* ucc_fast_transparent_txrx - UCC Fast Transparent TX & RX */ 87 enum ucc_fast_transparent_txrx { 88 UCC_FAST_GUMR_TRANSPARENT_TTX_TRX_NORMAL = 0x00000000, 89 UCC_FAST_GUMR_TRANSPARENT_TTX_TRX_TRANSPARENT = 0x18000000 90 }; 91 92 /* UCC fast diagnostic mode */ 93 enum ucc_fast_diag_mode { 94 UCC_FAST_DIAGNOSTIC_NORMAL = 0x0, 95 UCC_FAST_DIAGNOSTIC_LOCAL_LOOP_BACK = 0x40000000, 96 UCC_FAST_DIAGNOSTIC_AUTO_ECHO = 0x80000000, 97 UCC_FAST_DIAGNOSTIC_LOOP_BACK_AND_ECHO = 0xC0000000 98 }; 99 100 /* UCC fast Sync length (transparent mode only) */ 101 enum ucc_fast_sync_len { 102 UCC_FAST_SYNC_LEN_NOT_USED = 0x0, 103 UCC_FAST_SYNC_LEN_AUTOMATIC = 0x00004000, 104 UCC_FAST_SYNC_LEN_8_BIT = 0x00008000, 105 UCC_FAST_SYNC_LEN_16_BIT = 0x0000C000 106 }; 107 108 /* UCC fast RTS mode */ 109 enum ucc_fast_ready_to_send { 110 UCC_FAST_SEND_IDLES_BETWEEN_FRAMES = 0x00000000, 111 UCC_FAST_SEND_FLAGS_BETWEEN_FRAMES = 0x00002000 112 }; 113 114 /* UCC fast receiver decoding mode */ 115 enum ucc_fast_rx_decoding_method { 116 UCC_FAST_RX_ENCODING_NRZ = 0x00000000, 117 UCC_FAST_RX_ENCODING_NRZI = 0x00000800, 118 UCC_FAST_RX_ENCODING_RESERVED0 = 0x00001000, 119 UCC_FAST_RX_ENCODING_RESERVED1 = 0x00001800 120 }; 121 122 /* UCC fast transmitter encoding mode */ 123 enum ucc_fast_tx_encoding_method { 124 UCC_FAST_TX_ENCODING_NRZ = 0x00000000, 125 UCC_FAST_TX_ENCODING_NRZI = 0x00000100, 126 UCC_FAST_TX_ENCODING_RESERVED0 = 0x00000200, 127 UCC_FAST_TX_ENCODING_RESERVED1 = 0x00000300 128 }; 129 130 /* UCC fast CRC length */ 131 enum ucc_fast_transparent_tcrc { 132 UCC_FAST_16_BIT_CRC = 0x00000000, 133 UCC_FAST_CRC_RESERVED0 = 0x00000040, 134 UCC_FAST_32_BIT_CRC = 0x00000080, 135 UCC_FAST_CRC_RESERVED1 = 0x000000C0 136 }; 137 138 /* Fast UCC initialization structure */ 139 struct ucc_fast_info { 140 int ucc_num; 141 int tdm_num; 142 enum qe_clock rx_clock; 143 enum qe_clock tx_clock; 144 enum qe_clock rx_sync; 145 enum qe_clock tx_sync; 146 resource_size_t regs; 147 int irq; 148 u32 uccm_mask; 149 int bd_mem_part; 150 int brkpt_support; 151 int grant_support; 152 int tsa; 153 int cdp; 154 int cds; 155 int ctsp; 156 int ctss; 157 int tci; 158 int txsy; 159 int rtsm; 160 int revd; 161 int rsyn; 162 u16 max_rx_buf_length; 163 u16 urfs; 164 u16 urfet; 165 u16 urfset; 166 u16 utfs; 167 u16 utfet; 168 u16 utftt; 169 u16 ufpt; 170 enum ucc_fast_channel_protocol_mode mode; 171 enum ucc_fast_transparent_txrx ttx_trx; 172 enum ucc_fast_tx_encoding_method tenc; 173 enum ucc_fast_rx_decoding_method renc; 174 enum ucc_fast_transparent_tcrc tcrc; 175 enum ucc_fast_sync_len synl; 176 }; 177 178 struct ucc_fast_private { 179 struct ucc_fast_info *uf_info; 180 struct ucc_fast __iomem *uf_regs; /* a pointer to the UCC regs. */ 181 u32 __iomem *p_ucce; /* a pointer to the event register in memory. */ 182 u32 __iomem *p_uccm; /* a pointer to the mask register in memory. */ 183 #ifdef CONFIG_UGETH_TX_ON_DEMAND 184 u16 __iomem *p_utodr; /* pointer to the transmit on demand register */ 185 #endif 186 int enabled_tx; /* Whether channel is enabled for Tx (ENT) */ 187 int enabled_rx; /* Whether channel is enabled for Rx (ENR) */ 188 int stopped_tx; /* Whether channel has been stopped for Tx 189 (STOP_TX, etc.) */ 190 int stopped_rx; /* Whether channel has been stopped for Rx */ 191 u32 ucc_fast_tx_virtual_fifo_base_offset;/* pointer to base of Tx 192 virtual fifo */ 193 u32 ucc_fast_rx_virtual_fifo_base_offset;/* pointer to base of Rx 194 virtual fifo */ 195 #ifdef STATISTICS 196 u32 tx_frames; /* Transmitted frames counter. */ 197 u32 rx_frames; /* Received frames counter (only frames 198 passed to application). */ 199 u32 tx_discarded; /* Discarded tx frames counter (frames that 200 were discarded by the driver due to errors). 201 */ 202 u32 rx_discarded; /* Discarded rx frames counter (frames that 203 were discarded by the driver due to errors). 204 */ 205 #endif /* STATISTICS */ 206 u16 mrblr; /* maximum receive buffer length */ 207 }; 208 209 /* ucc_fast_init 210 * Initializes Fast UCC according to user provided parameters. 211 * 212 * uf_info - (In) pointer to the fast UCC info structure. 213 * uccf_ret - (Out) pointer to the fast UCC structure. 214 */ 215 int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** uccf_ret); 216 217 /* ucc_fast_free 218 * Frees all resources for fast UCC. 219 * 220 * uccf - (In) pointer to the fast UCC structure. 221 */ 222 void ucc_fast_free(struct ucc_fast_private * uccf); 223 224 /* ucc_fast_enable 225 * Enables a fast UCC port. 226 * This routine enables Tx and/or Rx through the General UCC Mode Register. 227 * 228 * uccf - (In) pointer to the fast UCC structure. 229 * mode - (In) TX, RX, or both. 230 */ 231 void ucc_fast_enable(struct ucc_fast_private * uccf, enum comm_dir mode); 232 233 /* ucc_fast_disable 234 * Disables a fast UCC port. 235 * This routine disables Tx and/or Rx through the General UCC Mode Register. 236 * 237 * uccf - (In) pointer to the fast UCC structure. 238 * mode - (In) TX, RX, or both. 239 */ 240 void ucc_fast_disable(struct ucc_fast_private * uccf, enum comm_dir mode); 241 242 /* ucc_fast_irq 243 * Handles interrupts on fast UCC. 244 * Called from the general interrupt routine to handle interrupts on fast UCC. 245 * 246 * uccf - (In) pointer to the fast UCC structure. 247 */ 248 void ucc_fast_irq(struct ucc_fast_private * uccf); 249 250 /* ucc_fast_transmit_on_demand 251 * Immediately forces a poll of the transmitter for data to be sent. 252 * Typically, the hardware performs a periodic poll for data that the 253 * transmit routine has set up to be transmitted. In cases where 254 * this polling cycle is not soon enough, this optional routine can 255 * be invoked to force a poll right away, instead. Proper use for 256 * each transmission for which this functionality is desired is to 257 * call the transmit routine and then this routine right after. 258 * 259 * uccf - (In) pointer to the fast UCC structure. 260 */ 261 void ucc_fast_transmit_on_demand(struct ucc_fast_private * uccf); 262 263 u32 ucc_fast_get_qe_cr_subblock(int uccf_num); 264 265 void ucc_fast_dump_regs(struct ucc_fast_private * uccf); 266 267 #endif /* __UCC_FAST_H__ */ 268