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
  20 /* Most bits of the CFG register are the same in log as in phy mode */
  21 #define D40_SREG_CFG_MST_POS            15
  22 #define D40_SREG_CFG_TIM_POS            14
  23 #define D40_SREG_CFG_EIM_POS            13
  24 #define D40_SREG_CFG_LOG_INCR_POS       12
  25 #define D40_SREG_CFG_PHY_PEN_POS        12
  26 #define D40_SREG_CFG_PSIZE_POS          10
  27 #define D40_SREG_CFG_ESIZE_POS           8
  28 #define D40_SREG_CFG_PRI_POS             7
  29 #define D40_SREG_CFG_LBE_POS             6
  30 #define D40_SREG_CFG_LOG_GIM_POS         5
  31 #define D40_SREG_CFG_LOG_MFU_POS         4
  32 #define D40_SREG_CFG_PHY_TM_POS          4
  33 #define D40_SREG_CFG_PHY_EVTL_POS        0
  34
  35
  36 /* Standard channel parameters - basic mode (element register) */
  37 #define D40_SREG_ELEM_PHY_ECNT_POS      16
  38 #define D40_SREG_ELEM_PHY_EIDX_POS       0
  39
  40 #define D40_SREG_ELEM_PHY_ECNT_MASK     (0xFFFF << D40_SREG_ELEM_PHY_ECNT_POS)
  41
  42 /* Standard channel parameters - basic mode (Link register) */
  43 #define D40_SREG_LNK_PHY_TCP_POS        0
  44 #define D40_SREG_LNK_PHY_LMP_POS        1
  45 #define D40_SREG_LNK_PHY_PRE_POS        2
  46 /*
  47  * Source  destination link address. Contains the
  48  * 29-bit byte word aligned address of the reload area.
  49  */
  50 #define D40_SREG_LNK_PHYS_LNK_MASK      0xFFFFFFF8UL
  51
  52 /* Standard basic channel logical mode */
  53
  54 /* Element register */
  55 #define D40_SREG_ELEM_LOG_ECNT_POS      16
  56 #define D40_SREG_ELEM_LOG_LIDX_POS       8
  57 #define D40_SREG_ELEM_LOG_LOS_POS        1
  58 #define D40_SREG_ELEM_LOG_TCP_POS        0
  59
  60 #define D40_SREG_ELEM_LOG_LIDX_MASK     (0xFF << D40_SREG_ELEM_LOG_LIDX_POS)
  61
  62 /* Link register */
  63 #define D40_DEACTIVATE_EVENTLINE        0x0
  64 #define D40_ACTIVATE_EVENTLINE          0x1
  65 #define D40_EVENTLINE_POS(i)            (2 * i)
  66 #define D40_EVENTLINE_MASK(i)           (0x3 << D40_EVENTLINE_POS(i))
  67
  68 /* Standard basic channel logical params in memory */
  69
  70 /* LCSP0 */
  71 #define D40_MEM_LCSP0_ECNT_POS          16
  72 #define D40_MEM_LCSP0_SPTR_POS           0
  73
  74 #define D40_MEM_LCSP0_ECNT_MASK         (0xFFFF << D40_MEM_LCSP0_ECNT_POS)
  75 #define D40_MEM_LCSP0_SPTR_MASK         (0xFFFF << D40_MEM_LCSP0_SPTR_POS)
  76
  77 /* LCSP1 */
  78 #define D40_MEM_LCSP1_SPTR_POS          16
  79 #define D40_MEM_LCSP1_SCFG_MST_POS      15
  80 #define D40_MEM_LCSP1_SCFG_TIM_POS      14
  81 #define D40_MEM_LCSP1_SCFG_EIM_POS      13
  82 #define D40_MEM_LCSP1_SCFG_INCR_POS     12
  83 #define D40_MEM_LCSP1_SCFG_PSIZE_POS    10
  84 #define D40_MEM_LCSP1_SCFG_ESIZE_POS     8
  85 #define D40_MEM_LCSP1_SLOS_POS           1
  86 #define D40_MEM_LCSP1_STCP_POS           0
  87
  88 #define D40_MEM_LCSP1_SPTR_MASK         (0xFFFF << D40_MEM_LCSP1_SPTR_POS)
  89 #define D40_MEM_LCSP1_SCFG_TIM_MASK     (0x1 << D40_MEM_LCSP1_SCFG_TIM_POS)
  90 #define D40_MEM_LCSP1_SCFG_INCR_MASK    (0x1 << D40_MEM_LCSP1_SCFG_INCR_POS)
  91 #define D40_MEM_LCSP1_SCFG_PSIZE_MASK   (0x3 << D40_MEM_LCSP1_SCFG_PSIZE_POS)
  92 #define D40_MEM_LCSP1_SLOS_MASK         (0x7F << D40_MEM_LCSP1_SLOS_POS)
  93 #define D40_MEM_LCSP1_STCP_MASK         (0x1 << D40_MEM_LCSP1_STCP_POS)
  94
  95 /* LCSP2 */
  96 #define D40_MEM_LCSP2_ECNT_POS          16
  97
  98 #define D40_MEM_LCSP2_ECNT_MASK         (0xFFFF << D40_MEM_LCSP2_ECNT_POS)
  99
 100 /* LCSP3 */
 101 #define D40_MEM_LCSP3_DCFG_MST_POS      15
 102 #define D40_MEM_LCSP3_DCFG_TIM_POS      14
 103 #define D40_MEM_LCSP3_DCFG_EIM_POS      13
 104 #define D40_MEM_LCSP3_DCFG_INCR_POS     12
 105 #define D40_MEM_LCSP3_DCFG_PSIZE_POS    10
 106 #define D40_MEM_LCSP3_DCFG_ESIZE_POS     8
 107 #define D40_MEM_LCSP3_DLOS_POS           1
 108 #define D40_MEM_LCSP3_DTCP_POS           0
 109
 110 #define D40_MEM_LCSP3_DLOS_MASK         (0x7F << D40_MEM_LCSP3_DLOS_POS)
 111 #define D40_MEM_LCSP3_DTCP_MASK         (0x1 << D40_MEM_LCSP3_DTCP_POS)
 112
 113
 114 /* Standard channel parameter register offsets */
 115 #define D40_CHAN_REG_SSCFG      0x00
 116 #define D40_CHAN_REG_SSELT      0x04
 117 #define D40_CHAN_REG_SSPTR      0x08
 118 #define D40_CHAN_REG_SSLNK      0x0C
 119 #define D40_CHAN_REG_SDCFG      0x10
 120 #define D40_CHAN_REG_SDELT      0x14
 121 #define D40_CHAN_REG_SDPTR      0x18
 122 #define D40_CHAN_REG_SDLNK      0x1C
 123
 124 /* DMA Register Offsets */
 125 #define D40_DREG_GCC            0x000
 126 #define D40_DREG_PRTYP          0x004
 127 #define D40_DREG_PRSME          0x008
 128 #define D40_DREG_PRSMO          0x00C
 129 #define D40_DREG_PRMSE          0x010
 130 #define D40_DREG_PRMSO          0x014
 131 #define D40_DREG_PRMOE          0x018
 132 #define D40_DREG_PRMOO          0x01C
 133 #define D40_DREG_PRMO_PCHAN_BASIC               0x1
 134 #define D40_DREG_PRMO_PCHAN_MODULO              0x2
 135 #define D40_DREG_PRMO_PCHAN_DOUBLE_DST          0x3
 136 #define D40_DREG_PRMO_LCHAN_SRC_PHY_DST_LOG     0x1
 137 #define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_PHY     0x2
 138 #define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG     0x3
 139
 140 #define D40_DREG_LCPA           0x020
 141 #define D40_DREG_LCLA           0x024
 142 #define D40_DREG_ACTIVE         0x050
 143 #define D40_DREG_ACTIVO         0x054
 144 #define D40_DREG_FSEB1          0x058
 145 #define D40_DREG_FSEB2          0x05C
 146 #define D40_DREG_PCMIS          0x060
 147 #define D40_DREG_PCICR          0x064
 148 #define D40_DREG_PCTIS          0x068
 149 #define D40_DREG_PCEIS          0x06C
 150 #define D40_DREG_LCMIS0         0x080
 151 #define D40_DREG_LCMIS1         0x084
 152 #define D40_DREG_LCMIS2         0x088
 153 #define D40_DREG_LCMIS3         0x08C
 154 #define D40_DREG_LCICR0         0x090
 155 #define D40_DREG_LCICR1         0x094
 156 #define D40_DREG_LCICR2         0x098
 157 #define D40_DREG_LCICR3         0x09C
 158 #define D40_DREG_LCTIS0         0x0A0
 159 #define D40_DREG_LCTIS1         0x0A4
 160 #define D40_DREG_LCTIS2         0x0A8
 161 #define D40_DREG_LCTIS3         0x0AC
 162 #define D40_DREG_LCEIS0         0x0B0
 163 #define D40_DREG_LCEIS1         0x0B4
 164 #define D40_DREG_LCEIS2         0x0B8
 165 #define D40_DREG_LCEIS3         0x0BC
 166 #define D40_DREG_STFU           0xFC8
 167 #define D40_DREG_ICFG           0xFCC
 168 #define D40_DREG_PERIPHID0      0xFE0
 169 #define D40_DREG_PERIPHID1      0xFE4
 170 #define D40_DREG_PERIPHID2      0xFE8
 171 #define D40_DREG_PERIPHID2_REV_POS 4
 172 #define D40_DREG_PERIPHID2_REV_MASK (0xf << D40_DREG_PERIPHID2_REV_POS)
 173 #define D40_DREG_PERIPHID2_DESIGNER_MASK 0xf
 174 #define D40_DREG_PERIPHID3      0xFEC
 175 #define D40_DREG_CELLID0        0xFF0
 176 #define D40_DREG_CELLID1        0xFF4
 177 #define D40_DREG_CELLID2        0xFF8
 178 #define D40_DREG_CELLID3        0xFFC
 179
 180 /* LLI related structures */
 181
 182 /**
 183  * struct d40_phy_lli - The basic configration register for each physical
 184  * channel.
 185  *
 186  * @reg_cfg: The configuration register.
 187  * @reg_elt: The element register.
 188  * @reg_ptr: The pointer register.
 189  * @reg_lnk: The link register.
 190  *
 191  * These registers are set up for both physical and logical transfers
 192  * Note that the bit in each register means differently in logical and
 193  * physical(standard) mode.
 194  *
 195  * This struct must be 16 bytes aligned, and only contain physical registers
 196  * since it will be directly accessed by the DMA.
 197  */
 198 struct d40_phy_lli {
 199         u32 reg_cfg;
 200         u32 reg_elt;
 201         u32 reg_ptr;
 202         u32 reg_lnk;
 203 };
 204
 205 /**
 206  * struct d40_phy_lli_bidir - struct for a transfer.
 207  *
 208  * @src: Register settings for src channel.
 209  * @dst: Register settings for dst channel.
 210  *
 211  * All DMA transfers have a source and a destination.
 212  */
 213
 214 struct d40_phy_lli_bidir {
 215         struct d40_phy_lli      *src;
 216         struct d40_phy_lli      *dst;
 217 };
 218
 219
 220 /**
 221  * struct d40_log_lli - logical lli configuration
 222  *
 223  * @lcsp02: Either maps to register lcsp0 if src or lcsp2 if dst.
 224  * @lcsp13: Either maps to register lcsp1 if src or lcsp3 if dst.
 225  *
 226  * This struct must be 8 bytes aligned since it will be accessed directy by
 227  * the DMA. Never add any none hw mapped registers to this struct.
 228  */
 229
 230 struct d40_log_lli {
 231         u32 lcsp02;
 232         u32 lcsp13;
 233 };
 234
 235 /**
 236  * struct d40_log_lli_bidir - For both src and dst
 237  *
 238  * @src: pointer to src lli configuration.
 239  * @dst: pointer to dst lli configuration.
 240  *
 241  * You always have a src and a dst when doing DMA transfers.
 242  */
 243
 244 struct d40_log_lli_bidir {
 245         struct d40_log_lli *src;
 246         struct d40_log_lli *dst;
 247 };
 248
 249 /**
 250  * struct d40_log_lli_full - LCPA layout
 251  *
 252  * @lcsp0: Logical Channel Standard Param 0 - Src.
 253  * @lcsp1: Logical Channel Standard Param 1 - Src.
 254  * @lcsp2: Logical Channel Standard Param 2 - Dst.
 255  * @lcsp3: Logical Channel Standard Param 3 - Dst.
 256  *
 257  * This struct maps to LCPA physical memory layout. Must map to
 258  * the hw.
 259  */
 260 struct d40_log_lli_full {
 261         u32 lcsp0;
 262         u32 lcsp1;
 263         u32 lcsp2;
 264         u32 lcsp3;
 265 };
 266
 267 /**
 268  * struct d40_def_lcsp - Default LCSP1 and LCSP3 settings
 269  *
 270  * @lcsp3: The default configuration for dst.
 271  * @lcsp1: The default configuration for src.
 272  */
 273 struct d40_def_lcsp {
 274         u32 lcsp3;
 275         u32 lcsp1;
 276 };
 277
 278 /* Physical channels */
 279
 280 void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
 281                  u32 *src_cfg,
 282                  u32 *dst_cfg,
 283                  bool is_log);
 284
 285 void d40_log_cfg(struct stedma40_chan_cfg *cfg,
 286                  u32 *lcsp1,
 287                  u32 *lcsp2);
 288
 289 int d40_phy_sg_to_lli(struct scatterlist *sg,
 290                       int sg_len,
 291                       dma_addr_t target,
 292                       struct d40_phy_lli *lli,
 293                       dma_addr_t lli_phys,
 294                       u32 reg_cfg,
 295                       u32 data_width,
 296                       int psize);
 297
 298 int d40_phy_fill_lli(struct d40_phy_lli *lli,
 299                      dma_addr_t data,
 300                      u32 data_size,
 301                      int psize,
 302                      dma_addr_t next_lli,
 303                      u32 reg_cfg,
 304                      bool term_int,
 305                      u32 data_width,
 306                      bool is_device);
 307
 308 void d40_phy_lli_write(void __iomem *virtbase,
 309                        u32 phy_chan_num,
 310                        struct d40_phy_lli *lli_dst,
 311                        struct d40_phy_lli *lli_src);
 312
 313 /* Logical channels */
 314
 315 void d40_log_fill_lli(struct d40_log_lli *lli,
 316                       dma_addr_t data,
 317                       u32 data_size,
 318                       u32 reg_cfg,
 319                       u32 data_width,
 320                       bool addr_inc);
 321
 322 int d40_log_sg_to_dev(struct scatterlist *sg,
 323                       int sg_len,
 324                       struct d40_log_lli_bidir *lli,
 325                       struct d40_def_lcsp *lcsp,
 326                       u32 src_data_width,
 327                       u32 dst_data_width,
 328                       enum dma_data_direction direction,
 329                       dma_addr_t dev_addr);
 330
 331 int d40_log_sg_to_lli(struct scatterlist *sg,
 332                       int sg_len,
 333                       struct d40_log_lli *lli_sg,
 334                       u32 lcsp13, /* src or dst*/
 335                       u32 data_width);
 336
 337 void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
 338                             struct d40_log_lli *lli_dst,
 339                             struct d40_log_lli *lli_src,
 340                             int next);
 341
 342 void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
 343                             struct d40_log_lli *lli_dst,
 344                             struct d40_log_lli *lli_src,
 345                             int next);
 346
 347 #endif /* STE_DMA40_LLI_H */