arch/powerpc/include/asm/ucc_fast.h

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