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