drivers/dma/ste_dma40_ll.h

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2007-2010
   3  * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson SA
   4  * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson SA
   5  * License terms: GNU General Public License (GPL) version 2
   6  */
   7 #ifndef STE_DMA40_LL_H
   8 #define STE_DMA40_LL_H
   9
  10 #define D40_DREG_PCBASE         0x400
  11 #define D40_DREG_PCDELTA        (8 * 4)
  12 #define D40_LLI_ALIGN           16 /* LLI alignment must be 16 bytes. */
  13
  14 #define D40_LCPA_CHAN_SIZE 32
  15 #define D40_LCPA_CHAN_DST_DELTA 16
  16
  17 #define D40_TYPE_TO_GROUP(type) (type / 16)
  18 #define D40_TYPE_TO_EVENT(type) (type % 16)
  19 #define D40_GROUP_SIZE 8
  20 #define D40_PHYS_TO_GROUP(phys) ((phys & (D40_GROUP_SIZE - 1)) / 2)
  21
  22 /* Most bits of the CFG register are the same in log as in phy mode */
  23 #define D40_SREG_CFG_MST_POS            15
  24 #define D40_SREG_CFG_TIM_POS            14
  25 #define D40_SREG_CFG_EIM_POS            13
  26 #define D40_SREG_CFG_LOG_INCR_POS       12
  27 #define D40_SREG_CFG_PHY_PEN_POS        12
  28 #define D40_SREG_CFG_PSIZE_POS          10
  29 #define D40_SREG_CFG_ESIZE_POS           8
  30 #define D40_SREG_CFG_PRI_POS             7
  31 #define D40_SREG_CFG_LBE_POS             6
  32 #define D40_SREG_CFG_LOG_GIM_POS         5
  33 #define D40_SREG_CFG_LOG_MFU_POS         4
  34 #define D40_SREG_CFG_PHY_TM_POS          4
  35 #define D40_SREG_CFG_PHY_EVTL_POS        0
  36
  37
  38 /* Standard channel parameters - basic mode (element register) */
  39 #define D40_SREG_ELEM_PHY_ECNT_POS      16
  40 #define D40_SREG_ELEM_PHY_EIDX_POS       0
  41
  42 #define D40_SREG_ELEM_PHY_ECNT_MASK     (0xFFFF << D40_SREG_ELEM_PHY_ECNT_POS)
  43
  44 /* Standard channel parameters - basic mode (Link register) */
  45 #define D40_SREG_LNK_PHY_TCP_POS        0
  46 #define D40_SREG_LNK_PHY_LMP_POS        1
  47 #define D40_SREG_LNK_PHY_PRE_POS        2
  48 /*
  49  * Source  destination link address. Contains the
  50  * 29-bit byte word aligned address of the reload area.
  51  */
  52 #define D40_SREG_LNK_PHYS_LNK_MASK      0xFFFFFFF8UL
  53
  54 /* Standard basic channel logical mode */
  55
  56 /* Element register */
  57 #define D40_SREG_ELEM_LOG_ECNT_POS      16
  58 #define D40_SREG_ELEM_LOG_LIDX_POS       8
  59 #define D40_SREG_ELEM_LOG_LOS_POS        1
  60 #define D40_SREG_ELEM_LOG_TCP_POS        0
  61
  62 #define D40_SREG_ELEM_LOG_LIDX_MASK     (0xFF << D40_SREG_ELEM_LOG_LIDX_POS)
  63
  64 /* Link register */
  65 #define D40_DEACTIVATE_EVENTLINE        0x0
  66 #define D40_ACTIVATE_EVENTLINE          0x1
  67 #define D40_EVENTLINE_POS(i)            (2 * i)
  68 #define D40_EVENTLINE_MASK(i)           (0x3 << D40_EVENTLINE_POS(i))
  69
  70 /* Standard basic channel logical params in memory */
  71
  72 /* LCSP0 */
  73 #define D40_MEM_LCSP0_ECNT_POS          16
  74 #define D40_MEM_LCSP0_SPTR_POS           0
  75
  76 #define D40_MEM_LCSP0_ECNT_MASK         (0xFFFF << D40_MEM_LCSP0_ECNT_POS)
  77 #define D40_MEM_LCSP0_SPTR_MASK         (0xFFFF << D40_MEM_LCSP0_SPTR_POS)
  78
  79 /* LCSP1 */
  80 #define D40_MEM_LCSP1_SPTR_POS          16
  81 #define D40_MEM_LCSP1_SCFG_MST_POS      15
  82 #define D40_MEM_LCSP1_SCFG_TIM_POS      14
  83 #define D40_MEM_LCSP1_SCFG_EIM_POS      13
  84 #define D40_MEM_LCSP1_SCFG_INCR_POS     12
  85 #define D40_MEM_LCSP1_SCFG_PSIZE_POS    10
  86 #define D40_MEM_LCSP1_SCFG_ESIZE_POS     8
  87 #define D40_MEM_LCSP1_SLOS_POS           1
  88 #define D40_MEM_LCSP1_STCP_POS           0
  89
  90 #define D40_MEM_LCSP1_SPTR_MASK         (0xFFFF << D40_MEM_LCSP1_SPTR_POS)
  91 #define D40_MEM_LCSP1_SCFG_TIM_MASK     (0x1 << D40_MEM_LCSP1_SCFG_TIM_POS)
  92 #define D40_MEM_LCSP1_SCFG_INCR_MASK    (0x1 << D40_MEM_LCSP1_SCFG_INCR_POS)
  93 #define D40_MEM_LCSP1_SCFG_PSIZE_MASK   (0x3 << D40_MEM_LCSP1_SCFG_PSIZE_POS)
  94 #define D40_MEM_LCSP1_SLOS_MASK         (0x7F << D40_MEM_LCSP1_SLOS_POS)
  95 #define D40_MEM_LCSP1_STCP_MASK         (0x1 << D40_MEM_LCSP1_STCP_POS)
  96
  97 /* LCSP2 */
  98 #define D40_MEM_LCSP2_ECNT_POS          16
  99
 100 #define D40_MEM_LCSP2_ECNT_MASK         (0xFFFF << D40_MEM_LCSP2_ECNT_POS)
 101
 102 /* LCSP3 */
 103 #define D40_MEM_LCSP3_DCFG_MST_POS      15
 104 #define D40_MEM_LCSP3_DCFG_TIM_POS      14
 105 #define D40_MEM_LCSP3_DCFG_EIM_POS      13
 106 #define D40_MEM_LCSP3_DCFG_INCR_POS     12
 107 #define D40_MEM_LCSP3_DCFG_PSIZE_POS    10
 108 #define D40_MEM_LCSP3_DCFG_ESIZE_POS     8
 109 #define D40_MEM_LCSP3_DLOS_POS           1
 110 #define D40_MEM_LCSP3_DTCP_POS           0
 111
 112 #define D40_MEM_LCSP3_DLOS_MASK         (0x7F << D40_MEM_LCSP3_DLOS_POS)
 113 #define D40_MEM_LCSP3_DTCP_MASK         (0x1 << D40_MEM_LCSP3_DTCP_POS)
 114
 115
 116 /* Standard channel parameter register offsets */
 117 #define D40_CHAN_REG_SSCFG      0x00
 118 #define D40_CHAN_REG_SSELT      0x04
 119 #define D40_CHAN_REG_SSPTR      0x08
 120 #define D40_CHAN_REG_SSLNK      0x0C
 121 #define D40_CHAN_REG_SDCFG      0x10
 122 #define D40_CHAN_REG_SDELT      0x14
 123 #define D40_CHAN_REG_SDPTR      0x18
 124 #define D40_CHAN_REG_SDLNK      0x1C
 125
 126 /* DMA Register Offsets */
 127 #define D40_DREG_GCC            0x000
 128 #define D40_DREG_GCC_ENA        0x1
 129 /* This assumes that there are only 4 event groups */
 130 #define D40_DREG_GCC_ENABLE_ALL 0xff01
 131 #define D40_DREG_GCC_EVTGRP_POS 8
 132 #define D40_DREG_GCC_SRC 0
 133 #define D40_DREG_GCC_DST 1
 134 #define D40_DREG_GCC_EVTGRP_ENA(x, y) \
 135         (1 << (D40_DREG_GCC_EVTGRP_POS + 2 * x + y))
 136
 137 #define D40_DREG_PRTYP          0x004
 138 #define D40_DREG_PRSME          0x008
 139 #define D40_DREG_PRSMO          0x00C
 140 #define D40_DREG_PRMSE          0x010
 141 #define D40_DREG_PRMSO          0x014
 142 #define D40_DREG_PRMOE          0x018
 143 #define D40_DREG_PRMOO          0x01C
 144 #define D40_DREG_PRMO_PCHAN_BASIC               0x1
 145 #define D40_DREG_PRMO_PCHAN_MODULO              0x2
 146 #define D40_DREG_PRMO_PCHAN_DOUBLE_DST          0x3
 147 #define D40_DREG_PRMO_LCHAN_SRC_PHY_DST_LOG     0x1
 148 #define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_PHY     0x2
 149 #define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG     0x3
 150
 151 #define D40_DREG_LCPA           0x020
 152 #define D40_DREG_LCLA           0x024
 153 #define D40_DREG_ACTIVE         0x050
 154 #define D40_DREG_ACTIVO         0x054
 155 #define D40_DREG_FSEB1          0x058
 156 #define D40_DREG_FSEB2          0x05C
 157 #define D40_DREG_PCMIS          0x060
 158 #define D40_DREG_PCICR          0x064
 159 #define D40_DREG_PCTIS          0x068
 160 #define D40_DREG_PCEIS          0x06C
 161 #define D40_DREG_LCMIS0         0x080
 162 #define D40_DREG_LCMIS1         0x084
 163 #define D40_DREG_LCMIS2         0x088
 164 #define D40_DREG_LCMIS3         0x08C
 165 #define D40_DREG_LCICR0         0x090
 166 #define D40_DREG_LCICR1         0x094
 167 #define D40_DREG_LCICR2         0x098
 168 #define D40_DREG_LCICR3         0x09C
 169 #define D40_DREG_LCTIS0         0x0A0
 170 #define D40_DREG_LCTIS1         0x0A4
 171 #define D40_DREG_LCTIS2         0x0A8
 172 #define D40_DREG_LCTIS3         0x0AC
 173 #define D40_DREG_LCEIS0         0x0B0
 174 #define D40_DREG_LCEIS1         0x0B4
 175 #define D40_DREG_LCEIS2         0x0B8
 176 #define D40_DREG_LCEIS3         0x0BC
 177 #define D40_DREG_PSEG1          0x110
 178 #define D40_DREG_PSEG2          0x114
 179 #define D40_DREG_PSEG3          0x118
 180 #define D40_DREG_PSEG4          0x11C
 181 #define D40_DREG_PCEG1          0x120
 182 #define D40_DREG_PCEG2          0x124
 183 #define D40_DREG_PCEG3          0x128
 184 #define D40_DREG_PCEG4          0x12C
 185 #define D40_DREG_RSEG1          0x130
 186 #define D40_DREG_RSEG2          0x134
 187 #define D40_DREG_RSEG3          0x138
 188 #define D40_DREG_RSEG4          0x13C
 189 #define D40_DREG_RCEG1          0x140
 190 #define D40_DREG_RCEG2          0x144
 191 #define D40_DREG_RCEG3          0x148
 192 #define D40_DREG_RCEG4          0x14C
 193 #define D40_DREG_STFU           0xFC8
 194 #define D40_DREG_ICFG           0xFCC
 195 #define D40_DREG_PERIPHID0      0xFE0
 196 #define D40_DREG_PERIPHID1      0xFE4
 197 #define D40_DREG_PERIPHID2      0xFE8
 198 #define D40_DREG_PERIPHID3      0xFEC
 199 #define D40_DREG_CELLID0        0xFF0
 200 #define D40_DREG_CELLID1        0xFF4
 201 #define D40_DREG_CELLID2        0xFF8
 202 #define D40_DREG_CELLID3        0xFFC
 203
 204 /* LLI related structures */
 205
 206 /**
 207  * struct d40_phy_lli - The basic configration register for each physical
 208  * channel.
 209  *
 210  * @reg_cfg: The configuration register.
 211  * @reg_elt: The element register.
 212  * @reg_ptr: The pointer register.
 213  * @reg_lnk: The link register.
 214  *
 215  * These registers are set up for both physical and logical transfers
 216  * Note that the bit in each register means differently in logical and
 217  * physical(standard) mode.
 218  *
 219  * This struct must be 16 bytes aligned, and only contain physical registers
 220  * since it will be directly accessed by the DMA.
 221  */
 222 struct d40_phy_lli {
 223         u32 reg_cfg;
 224         u32 reg_elt;
 225         u32 reg_ptr;
 226         u32 reg_lnk;
 227 };
 228
 229 /**
 230  * struct d40_phy_lli_bidir - struct for a transfer.
 231  *
 232  * @src: Register settings for src channel.
 233  * @dst: Register settings for dst channel.
 234  *
 235  * All DMA transfers have a source and a destination.
 236  */
 237
 238 struct d40_phy_lli_bidir {
 239         struct d40_phy_lli      *src;
 240         struct d40_phy_lli      *dst;
 241 };
 242
 243
 244 /**
 245  * struct d40_log_lli - logical lli configuration
 246  *
 247  * @lcsp02: Either maps to register lcsp0 if src or lcsp2 if dst.
 248  * @lcsp13: Either maps to register lcsp1 if src or lcsp3 if dst.
 249  *
 250  * This struct must be 8 bytes aligned since it will be accessed directy by
 251  * the DMA. Never add any none hw mapped registers to this struct.
 252  */
 253
 254 struct d40_log_lli {
 255         u32 lcsp02;
 256         u32 lcsp13;
 257 };
 258
 259 /**
 260  * struct d40_log_lli_bidir - For both src and dst
 261  *
 262  * @src: pointer to src lli configuration.
 263  * @dst: pointer to dst lli configuration.
 264  *
 265  * You always have a src and a dst when doing DMA transfers.
 266  */
 267
 268 struct d40_log_lli_bidir {
 269         struct d40_log_lli *src;
 270         struct d40_log_lli *dst;
 271 };
 272
 273 /**
 274  * struct d40_log_lli_full - LCPA layout
 275  *
 276  * @lcsp0: Logical Channel Standard Param 0 - Src.
 277  * @lcsp1: Logical Channel Standard Param 1 - Src.
 278  * @lcsp2: Logical Channel Standard Param 2 - Dst.
 279  * @lcsp3: Logical Channel Standard Param 3 - Dst.
 280  *
 281  * This struct maps to LCPA physical memory layout. Must map to
 282  * the hw.
 283  */
 284 struct d40_log_lli_full {
 285         u32 lcsp0;
 286         u32 lcsp1;
 287         u32 lcsp2;
 288         u32 lcsp3;
 289 };
 290
 291 /**
 292  * struct d40_def_lcsp - Default LCSP1 and LCSP3 settings
 293  *
 294  * @lcsp3: The default configuration for dst.
 295  * @lcsp1: The default configuration for src.
 296  */
 297 struct d40_def_lcsp {
 298         u32 lcsp3;
 299         u32 lcsp1;
 300 };
 301
 302 /* Physical channels */
 303
 304 enum d40_lli_flags {
 305         LLI_ADDR_INC    = 1 << 0,
 306         LLI_TERM_INT    = 1 << 1,
 307         LLI_CYCLIC      = 1 << 2,
 308         LLI_LAST_LINK   = 1 << 3,
 309 };
 310
 311 void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
 312                  u32 *src_cfg,
 313                  u32 *dst_cfg,
 314                  bool is_log);
 315
 316 void d40_log_cfg(struct stedma40_chan_cfg *cfg,
 317                  u32 *lcsp1,
 318                  u32 *lcsp2);
 319
 320 int d40_phy_sg_to_lli(struct scatterlist *sg,
 321                       int sg_len,
 322                       dma_addr_t target,
 323                       struct d40_phy_lli *lli,
 324                       dma_addr_t lli_phys,
 325                       u32 reg_cfg,
 326                       struct stedma40_half_channel_info *info,
 327                       struct stedma40_half_channel_info *otherinfo,
 328                       unsigned long flags);
 329
 330 /* Logical channels */
 331
 332 int d40_log_sg_to_lli(struct scatterlist *sg,
 333                       int sg_len,
 334                       dma_addr_t dev_addr,
 335                       struct d40_log_lli *lli_sg,
 336                       u32 lcsp13, /* src or dst*/
 337                       u32 data_width1, u32 data_width2);
 338
 339 void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
 340                             struct d40_log_lli *lli_dst,
 341                             struct d40_log_lli *lli_src,
 342                             int next, unsigned int flags);
 343
 344 void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
 345                             struct d40_log_lli *lli_dst,
 346                             struct d40_log_lli *lli_src,
 347                             int next, unsigned int flags);
 348
 349 #endif /* STE_DMA40_LLI_H */