include/linux/omap-dma.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_OMAP_DMA_H
   3 #define __LINUX_OMAP_DMA_H
   4 #include <linux/omap-dmaengine.h>
   5
   6 /*
   7  *  Legacy OMAP DMA handling defines and functions
   8  *
   9  *  NOTE: Do not use these any longer.
  10  *
  11  *  Use the generic dmaengine functions as defined in
  12  *  include/linux/dmaengine.h.
  13  *
  14  *  Copyright (C) 2003 Nokia Corporation
  15  *  Author: Juha Yrjölä <juha.yrjola@nokia.com>
  16  *
  17  */
  18
  19 #include <linux/platform_device.h>
  20
  21 #define INT_DMA_LCD                     (NR_IRQS_LEGACY + 25)
  22
  23 #define OMAP1_DMA_TOUT_IRQ              (1 << 0)
  24 #define OMAP_DMA_DROP_IRQ               (1 << 1)
  25 #define OMAP_DMA_HALF_IRQ               (1 << 2)
  26 #define OMAP_DMA_FRAME_IRQ              (1 << 3)
  27 #define OMAP_DMA_LAST_IRQ               (1 << 4)
  28 #define OMAP_DMA_BLOCK_IRQ              (1 << 5)
  29 #define OMAP1_DMA_SYNC_IRQ              (1 << 6)
  30 #define OMAP2_DMA_PKT_IRQ               (1 << 7)
  31 #define OMAP2_DMA_TRANS_ERR_IRQ         (1 << 8)
  32 #define OMAP2_DMA_SECURE_ERR_IRQ        (1 << 9)
  33 #define OMAP2_DMA_SUPERVISOR_ERR_IRQ    (1 << 10)
  34 #define OMAP2_DMA_MISALIGNED_ERR_IRQ    (1 << 11)
  35
  36 #define OMAP_DMA_CCR_EN                 (1 << 7)
  37 #define OMAP_DMA_CCR_RD_ACTIVE          (1 << 9)
  38 #define OMAP_DMA_CCR_WR_ACTIVE          (1 << 10)
  39 #define OMAP_DMA_CCR_SEL_SRC_DST_SYNC   (1 << 24)
  40 #define OMAP_DMA_CCR_BUFFERING_DISABLE  (1 << 25)
  41
  42 #define OMAP_DMA_DATA_TYPE_S8           0x00
  43 #define OMAP_DMA_DATA_TYPE_S16          0x01
  44 #define OMAP_DMA_DATA_TYPE_S32          0x02
  45
  46 #define OMAP_DMA_SYNC_ELEMENT           0x00
  47 #define OMAP_DMA_SYNC_FRAME             0x01
  48 #define OMAP_DMA_SYNC_BLOCK             0x02
  49 #define OMAP_DMA_SYNC_PACKET            0x03
  50
  51 #define OMAP_DMA_DST_SYNC_PREFETCH      0x02
  52 #define OMAP_DMA_SRC_SYNC               0x01
  53 #define OMAP_DMA_DST_SYNC               0x00
  54
  55 #define OMAP_DMA_PORT_EMIFF             0x00
  56 #define OMAP_DMA_PORT_EMIFS             0x01
  57 #define OMAP_DMA_PORT_OCP_T1            0x02
  58 #define OMAP_DMA_PORT_TIPB              0x03
  59 #define OMAP_DMA_PORT_OCP_T2            0x04
  60 #define OMAP_DMA_PORT_MPUI              0x05
  61
  62 #define OMAP_DMA_AMODE_CONSTANT         0x00
  63 #define OMAP_DMA_AMODE_POST_INC         0x01
  64 #define OMAP_DMA_AMODE_SINGLE_IDX       0x02
  65 #define OMAP_DMA_AMODE_DOUBLE_IDX       0x03
  66
  67 #define DMA_DEFAULT_FIFO_DEPTH          0x10
  68 #define DMA_DEFAULT_ARB_RATE            0x01
  69 /* Pass THREAD_RESERVE ORed with THREAD_FIFO for tparams */
  70 #define DMA_THREAD_RESERVE_NORM         (0x00 << 12) /* Def */
  71 #define DMA_THREAD_RESERVE_ONET         (0x01 << 12)
  72 #define DMA_THREAD_RESERVE_TWOT         (0x02 << 12)
  73 #define DMA_THREAD_RESERVE_THREET       (0x03 << 12)
  74 #define DMA_THREAD_FIFO_NONE            (0x00 << 14) /* Def */
  75 #define DMA_THREAD_FIFO_75              (0x01 << 14)
  76 #define DMA_THREAD_FIFO_25              (0x02 << 14)
  77 #define DMA_THREAD_FIFO_50              (0x03 << 14)
  78
  79 /* DMA4_OCP_SYSCONFIG bits */
  80 #define DMA_SYSCONFIG_MIDLEMODE_MASK            (3 << 12)
  81 #define DMA_SYSCONFIG_CLOCKACTIVITY_MASK        (3 << 8)
  82 #define DMA_SYSCONFIG_EMUFREE                   (1 << 5)
  83 #define DMA_SYSCONFIG_SIDLEMODE_MASK            (3 << 3)
  84 #define DMA_SYSCONFIG_SOFTRESET                 (1 << 2)
  85 #define DMA_SYSCONFIG_AUTOIDLE                  (1 << 0)
  86
  87 #define DMA_SYSCONFIG_MIDLEMODE(n)              ((n) << 12)
  88 #define DMA_SYSCONFIG_SIDLEMODE(n)              ((n) << 3)
  89
  90 #define DMA_IDLEMODE_SMARTIDLE                  0x2
  91 #define DMA_IDLEMODE_NO_IDLE                    0x1
  92 #define DMA_IDLEMODE_FORCE_IDLE                 0x0
  93
  94 /* Chaining modes*/
  95 #ifndef CONFIG_ARCH_OMAP1
  96 #define OMAP_DMA_STATIC_CHAIN           0x1
  97 #define OMAP_DMA_DYNAMIC_CHAIN          0x2
  98 #define OMAP_DMA_CHAIN_ACTIVE           0x1
  99 #define OMAP_DMA_CHAIN_INACTIVE         0x0
 100 #endif
 101
 102 #define DMA_CH_PRIO_HIGH                0x1
 103 #define DMA_CH_PRIO_LOW                 0x0 /* Def */
 104
 105 /* Errata handling */
 106 #define IS_DMA_ERRATA(id)               (errata & (id))
 107 #define SET_DMA_ERRATA(id)              (errata |= (id))
 108
 109 #define DMA_ERRATA_IFRAME_BUFFERING     BIT(0x0)
 110 #define DMA_ERRATA_PARALLEL_CHANNELS    BIT(0x1)
 111 #define DMA_ERRATA_i378                 BIT(0x2)
 112 #define DMA_ERRATA_i541                 BIT(0x3)
 113 #define DMA_ERRATA_i88                  BIT(0x4)
 114 #define DMA_ERRATA_3_3                  BIT(0x5)
 115 #define DMA_ROMCODE_BUG                 BIT(0x6)
 116
 117 /* Attributes for OMAP DMA Contrller */
 118 #define DMA_LINKED_LCH                  BIT(0x0)
 119 #define GLOBAL_PRIORITY                 BIT(0x1)
 120 #define RESERVE_CHANNEL                 BIT(0x2)
 121 #define IS_CSSA_32                      BIT(0x3)
 122 #define IS_CDSA_32                      BIT(0x4)
 123 #define IS_RW_PRIORITY                  BIT(0x5)
 124 #define ENABLE_1510_MODE                BIT(0x6)
 125 #define SRC_PORT                        BIT(0x7)
 126 #define DST_PORT                        BIT(0x8)
 127 #define SRC_INDEX                       BIT(0x9)
 128 #define DST_INDEX                       BIT(0xa)
 129 #define IS_BURST_ONLY4                  BIT(0xb)
 130 #define CLEAR_CSR_ON_READ               BIT(0xc)
 131 #define IS_WORD_16                      BIT(0xd)
 132 #define ENABLE_16XX_MODE                BIT(0xe)
 133 #define HS_CHANNELS_RESERVED            BIT(0xf)
 134 #define DMA_ENGINE_HANDLE_IRQ           BIT(0x10)
 135
 136 /* Defines for DMA Capabilities */
 137 #define DMA_HAS_TRANSPARENT_CAPS        (0x1 << 18)
 138 #define DMA_HAS_CONSTANT_FILL_CAPS      (0x1 << 19)
 139 #define DMA_HAS_DESCRIPTOR_CAPS         (0x3 << 20)
 140
 141 enum omap_reg_offsets {
 142
 143 GCR,            GSCR,           GRST1,          HW_ID,
 144 PCH2_ID,        PCH0_ID,        PCH1_ID,        PCHG_ID,
 145 PCHD_ID,        CAPS_0,         CAPS_1,         CAPS_2,
 146 CAPS_3,         CAPS_4,         PCH2_SR,        PCH0_SR,
 147 PCH1_SR,        PCHD_SR,        REVISION,       IRQSTATUS_L0,
 148 IRQSTATUS_L1,   IRQSTATUS_L2,   IRQSTATUS_L3,   IRQENABLE_L0,
 149 IRQENABLE_L1,   IRQENABLE_L2,   IRQENABLE_L3,   SYSSTATUS,
 150 OCP_SYSCONFIG,
 151
 152 /* omap1+ specific */
 153 CPC, CCR2, LCH_CTRL,
 154
 155 /* Common registers for all omap's */
 156 CSDP,           CCR,            CICR,           CSR,
 157 CEN,            CFN,            CSFI,           CSEI,
 158 CSAC,           CDAC,           CDEI,
 159 CDFI,           CLNK_CTRL,
 160
 161 /* Channel specific registers */
 162 CSSA,           CDSA,           COLOR,
 163 CCEN,           CCFN,
 164
 165 /* omap3630 and omap4 specific */
 166 CDP,            CNDP,           CCDN,
 167
 168 };
 169
 170 enum omap_dma_burst_mode {
 171         OMAP_DMA_DATA_BURST_DIS = 0,
 172         OMAP_DMA_DATA_BURST_4,
 173         OMAP_DMA_DATA_BURST_8,
 174         OMAP_DMA_DATA_BURST_16,
 175 };
 176
 177 enum end_type {
 178         OMAP_DMA_LITTLE_ENDIAN = 0,
 179         OMAP_DMA_BIG_ENDIAN
 180 };
 181
 182 enum omap_dma_color_mode {
 183         OMAP_DMA_COLOR_DIS = 0,
 184         OMAP_DMA_CONSTANT_FILL,
 185         OMAP_DMA_TRANSPARENT_COPY
 186 };
 187
 188 enum omap_dma_write_mode {
 189         OMAP_DMA_WRITE_NON_POSTED = 0,
 190         OMAP_DMA_WRITE_POSTED,
 191         OMAP_DMA_WRITE_LAST_NON_POSTED
 192 };
 193
 194 enum omap_dma_channel_mode {
 195         OMAP_DMA_LCH_2D = 0,
 196         OMAP_DMA_LCH_G,
 197         OMAP_DMA_LCH_P,
 198         OMAP_DMA_LCH_PD
 199 };
 200
 201 struct omap_dma_channel_params {
 202         int data_type;          /* data type 8,16,32 */
 203         int elem_count;         /* number of elements in a frame */
 204         int frame_count;        /* number of frames in a element */
 205
 206         int src_port;           /* Only on OMAP1 REVISIT: Is this needed? */
 207         int src_amode;          /* constant, post increment, indexed,
 208                                         double indexed */
 209         unsigned long src_start;        /* source address : physical */
 210         int src_ei;             /* source element index */
 211         int src_fi;             /* source frame index */
 212
 213         int dst_port;           /* Only on OMAP1 REVISIT: Is this needed? */
 214         int dst_amode;          /* constant, post increment, indexed,
 215                                         double indexed */
 216         unsigned long dst_start;        /* source address : physical */
 217         int dst_ei;             /* source element index */
 218         int dst_fi;             /* source frame index */
 219
 220         int trigger;            /* trigger attached if the channel is
 221                                         synchronized */
 222         int sync_mode;          /* sycn on element, frame , block or packet */
 223         int src_or_dst_synch;   /* source synch(1) or destination synch(0) */
 224
 225         int ie;                 /* interrupt enabled */
 226
 227         unsigned char read_prio;/* read priority */
 228         unsigned char write_prio;/* write priority */
 229
 230 #ifndef CONFIG_ARCH_OMAP1
 231         enum omap_dma_burst_mode burst_mode; /* Burst mode 4/8/16 words */
 232 #endif
 233 };
 234
 235 struct omap_dma_lch {
 236         int next_lch;
 237         int dev_id;
 238         u16 saved_csr;
 239         u16 enabled_irqs;
 240         const char *dev_name;
 241         void (*callback)(int lch, u16 ch_status, void *data);
 242         void *data;
 243         long flags;
 244         /* required for Dynamic chaining */
 245         int prev_linked_ch;
 246         int next_linked_ch;
 247         int state;
 248         int chain_id;
 249         int status;
 250 };
 251
 252 struct omap_dma_dev_attr {
 253         u32 dev_caps;
 254         u16 lch_count;
 255         u16 chan_count;
 256 };
 257
 258 enum {
 259         OMAP_DMA_REG_NONE,
 260         OMAP_DMA_REG_16BIT,
 261         OMAP_DMA_REG_2X16BIT,
 262         OMAP_DMA_REG_32BIT,
 263 };
 264
 265 struct omap_dma_reg {
 266         u16     offset;
 267         u8      stride;
 268         u8      type;
 269 };
 270
 271 #define SDMA_FILTER_PARAM(hw_req)       ((int[]) { (hw_req) })
 272 struct dma_slave_map;
 273
 274 /* System DMA platform data structure */
 275 struct omap_system_dma_plat_info {
 276         const struct omap_dma_reg *reg_map;
 277         unsigned channel_stride;
 278         struct omap_dma_dev_attr *dma_attr;
 279         u32 errata;
 280         void (*show_dma_caps)(void);
 281         void (*clear_lch_regs)(int lch);
 282         void (*clear_dma)(int lch);
 283         void (*dma_write)(u32 val, int reg, int lch);
 284         u32 (*dma_read)(int reg, int lch);
 285
 286         const struct dma_slave_map *slave_map;
 287         int slavecnt;
 288 };
 289
 290 #ifdef CONFIG_ARCH_OMAP2PLUS
 291 #define dma_omap2plus() 1
 292 #else
 293 #define dma_omap2plus() 0
 294 #endif
 295 #define dma_omap1()     (!dma_omap2plus())
 296 #define __dma_omap15xx(d) (dma_omap1() && (d)->dev_caps & ENABLE_1510_MODE)
 297 #define __dma_omap16xx(d) (dma_omap1() && (d)->dev_caps & ENABLE_16XX_MODE)
 298 #define dma_omap15xx()  __dma_omap15xx(d)
 299 #define dma_omap16xx()  __dma_omap16xx(d)
 300
 301 #if defined(CONFIG_ARCH_OMAP)
 302 extern struct omap_system_dma_plat_info *omap_get_plat_info(void);
 303
 304 extern void omap_set_dma_priority(int lch, int dst_port, int priority);
 305 extern int omap_request_dma(int dev_id, const char *dev_name,
 306                         void (*callback)(int lch, u16 ch_status, void *data),
 307                         void *data, int *dma_ch);
 308 extern void omap_enable_dma_irq(int ch, u16 irq_bits);
 309 extern void omap_disable_dma_irq(int ch, u16 irq_bits);
 310 extern void omap_free_dma(int ch);
 311 extern void omap_start_dma(int lch);
 312 extern void omap_stop_dma(int lch);
 313 extern void omap_set_dma_transfer_params(int lch, int data_type,
 314                                          int elem_count, int frame_count,
 315                                          int sync_mode,
 316                                          int dma_trigger, int src_or_dst_synch);
 317 extern void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode);
 318 extern void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode);
 319
 320 extern void omap_set_dma_src_params(int lch, int src_port, int src_amode,
 321                                     unsigned long src_start,
 322                                     int src_ei, int src_fi);
 323 extern void omap_set_dma_src_data_pack(int lch, int enable);
 324 extern void omap_set_dma_src_burst_mode(int lch,
 325                                         enum omap_dma_burst_mode burst_mode);
 326
 327 extern void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
 328                                      unsigned long dest_start,
 329                                      int dst_ei, int dst_fi);
 330 extern void omap_set_dma_dest_data_pack(int lch, int enable);
 331 extern void omap_set_dma_dest_burst_mode(int lch,
 332                                          enum omap_dma_burst_mode burst_mode);
 333
 334 extern void omap_set_dma_params(int lch,
 335                                 struct omap_dma_channel_params *params);
 336
 337 extern void omap_dma_link_lch(int lch_head, int lch_queue);
 338
 339 extern int omap_set_dma_callback(int lch,
 340                         void (*callback)(int lch, u16 ch_status, void *data),
 341                         void *data);
 342 extern dma_addr_t omap_get_dma_src_pos(int lch);
 343 extern dma_addr_t omap_get_dma_dst_pos(int lch);
 344 extern int omap_get_dma_active_status(int lch);
 345 extern int omap_dma_running(void);
 346 extern void omap_dma_set_global_params(int arb_rate, int max_fifo_depth,
 347                                        int tparams);
 348 void omap_dma_global_context_save(void);
 349 void omap_dma_global_context_restore(void);
 350
 351 #if defined(CONFIG_ARCH_OMAP1) && IS_ENABLED(CONFIG_FB_OMAP)
 352 #include <mach/lcd_dma.h>
 353 #else
 354 static inline int omap_lcd_dma_running(void)
 355 {
 356         return 0;
 357 }
 358 #endif
 359
 360 #else /* CONFIG_ARCH_OMAP */
 361
 362 static inline struct omap_system_dma_plat_info *omap_get_plat_info(void)
 363 {
 364         return NULL;
 365 }
 366
 367 static inline int omap_request_dma(int dev_id, const char *dev_name,
 368                         void (*callback)(int lch, u16 ch_status, void *data),
 369                         void *data, int *dma_ch)
 370 {
 371         return -ENODEV;
 372 }
 373
 374 static inline void omap_free_dma(int ch) { }
 375
 376 #endif /* CONFIG_ARCH_OMAP */
 377
 378 #endif /* __LINUX_OMAP_DMA_H */