include/asm-powerpc/ucc_fast.h

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