xref: /openbmc/linux/drivers/dma/ste_dma40_ll.h (revision af873fce)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) ST-Ericsson SA 2007-2010
4  * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson SA
5  * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson SA
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_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_GCC_ENA	0x1
127 /* This assumes that there are only 4 event groups */
128 #define D40_DREG_GCC_ENABLE_ALL	0x3ff01
129 #define D40_DREG_GCC_EVTGRP_POS 8
130 #define D40_DREG_GCC_SRC 0
131 #define D40_DREG_GCC_DST 1
132 #define D40_DREG_GCC_EVTGRP_ENA(x, y) \
133 	(1 << (D40_DREG_GCC_EVTGRP_POS + 2 * x + y))
134 
135 #define D40_DREG_PRTYP		0x004
136 #define D40_DREG_PRSME		0x008
137 #define D40_DREG_PRSMO		0x00C
138 #define D40_DREG_PRMSE		0x010
139 #define D40_DREG_PRMSO		0x014
140 #define D40_DREG_PRMOE		0x018
141 #define D40_DREG_PRMOO		0x01C
142 #define D40_DREG_PRMO_PCHAN_BASIC		0x1
143 #define D40_DREG_PRMO_PCHAN_MODULO		0x2
144 #define D40_DREG_PRMO_PCHAN_DOUBLE_DST		0x3
145 #define D40_DREG_PRMO_LCHAN_SRC_PHY_DST_LOG	0x1
146 #define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_PHY	0x2
147 #define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG	0x3
148 
149 #define D40_DREG_LCPA		0x020
150 #define D40_DREG_LCLA		0x024
151 
152 #define D40_DREG_SSEG1		0x030
153 #define D40_DREG_SSEG2		0x034
154 #define D40_DREG_SSEG3		0x038
155 #define D40_DREG_SSEG4		0x03C
156 
157 #define D40_DREG_SCEG1		0x040
158 #define D40_DREG_SCEG2		0x044
159 #define D40_DREG_SCEG3		0x048
160 #define D40_DREG_SCEG4		0x04C
161 
162 #define D40_DREG_ACTIVE		0x050
163 #define D40_DREG_ACTIVO		0x054
164 #define D40_DREG_CIDMOD		0x058
165 #define D40_DREG_TCIDV		0x05C
166 #define D40_DREG_PCMIS		0x060
167 #define D40_DREG_PCICR		0x064
168 #define D40_DREG_PCTIS		0x068
169 #define D40_DREG_PCEIS		0x06C
170 
171 #define D40_DREG_SPCMIS		0x070
172 #define D40_DREG_SPCICR		0x074
173 #define D40_DREG_SPCTIS		0x078
174 #define D40_DREG_SPCEIS		0x07C
175 
176 #define D40_DREG_LCMIS0		0x080
177 #define D40_DREG_LCMIS1		0x084
178 #define D40_DREG_LCMIS2		0x088
179 #define D40_DREG_LCMIS3		0x08C
180 #define D40_DREG_LCICR0		0x090
181 #define D40_DREG_LCICR1		0x094
182 #define D40_DREG_LCICR2		0x098
183 #define D40_DREG_LCICR3		0x09C
184 #define D40_DREG_LCTIS0		0x0A0
185 #define D40_DREG_LCTIS1		0x0A4
186 #define D40_DREG_LCTIS2		0x0A8
187 #define D40_DREG_LCTIS3		0x0AC
188 #define D40_DREG_LCEIS0		0x0B0
189 #define D40_DREG_LCEIS1		0x0B4
190 #define D40_DREG_LCEIS2		0x0B8
191 #define D40_DREG_LCEIS3		0x0BC
192 
193 #define D40_DREG_SLCMIS1	0x0C0
194 #define D40_DREG_SLCMIS2	0x0C4
195 #define D40_DREG_SLCMIS3	0x0C8
196 #define D40_DREG_SLCMIS4	0x0CC
197 
198 #define D40_DREG_SLCICR1	0x0D0
199 #define D40_DREG_SLCICR2	0x0D4
200 #define D40_DREG_SLCICR3	0x0D8
201 #define D40_DREG_SLCICR4	0x0DC
202 
203 #define D40_DREG_SLCTIS1	0x0E0
204 #define D40_DREG_SLCTIS2	0x0E4
205 #define D40_DREG_SLCTIS3	0x0E8
206 #define D40_DREG_SLCTIS4	0x0EC
207 
208 #define D40_DREG_SLCEIS1	0x0F0
209 #define D40_DREG_SLCEIS2	0x0F4
210 #define D40_DREG_SLCEIS3	0x0F8
211 #define D40_DREG_SLCEIS4	0x0FC
212 
213 #define D40_DREG_FSESS1		0x100
214 #define D40_DREG_FSESS2		0x104
215 
216 #define D40_DREG_FSEBS1		0x108
217 #define D40_DREG_FSEBS2		0x10C
218 
219 #define D40_DREG_PSEG1		0x110
220 #define D40_DREG_PSEG2		0x114
221 #define D40_DREG_PSEG3		0x118
222 #define D40_DREG_PSEG4		0x11C
223 #define D40_DREG_PCEG1		0x120
224 #define D40_DREG_PCEG2		0x124
225 #define D40_DREG_PCEG3		0x128
226 #define D40_DREG_PCEG4		0x12C
227 #define D40_DREG_RSEG1		0x130
228 #define D40_DREG_RSEG2		0x134
229 #define D40_DREG_RSEG3		0x138
230 #define D40_DREG_RSEG4		0x13C
231 #define D40_DREG_RCEG1		0x140
232 #define D40_DREG_RCEG2		0x144
233 #define D40_DREG_RCEG3		0x148
234 #define D40_DREG_RCEG4		0x14C
235 
236 #define D40_DREG_PREFOT		0x15C
237 #define D40_DREG_EXTCFG		0x160
238 
239 #define D40_DREG_CPSEG1		0x200
240 #define D40_DREG_CPSEG2		0x204
241 #define D40_DREG_CPSEG3		0x208
242 #define D40_DREG_CPSEG4		0x20C
243 #define D40_DREG_CPSEG5		0x210
244 
245 #define D40_DREG_CPCEG1		0x220
246 #define D40_DREG_CPCEG2		0x224
247 #define D40_DREG_CPCEG3		0x228
248 #define D40_DREG_CPCEG4		0x22C
249 #define D40_DREG_CPCEG5		0x230
250 
251 #define D40_DREG_CRSEG1		0x240
252 #define D40_DREG_CRSEG2		0x244
253 #define D40_DREG_CRSEG3		0x248
254 #define D40_DREG_CRSEG4		0x24C
255 #define D40_DREG_CRSEG5		0x250
256 
257 #define D40_DREG_CRCEG1		0x260
258 #define D40_DREG_CRCEG2		0x264
259 #define D40_DREG_CRCEG3		0x268
260 #define D40_DREG_CRCEG4		0x26C
261 #define D40_DREG_CRCEG5		0x270
262 
263 #define D40_DREG_CFSESS1	0x280
264 #define D40_DREG_CFSESS2	0x284
265 #define D40_DREG_CFSESS3	0x288
266 
267 #define D40_DREG_CFSEBS1	0x290
268 #define D40_DREG_CFSEBS2	0x294
269 #define D40_DREG_CFSEBS3	0x298
270 
271 #define D40_DREG_CLCMIS1	0x300
272 #define D40_DREG_CLCMIS2	0x304
273 #define D40_DREG_CLCMIS3	0x308
274 #define D40_DREG_CLCMIS4	0x30C
275 #define D40_DREG_CLCMIS5	0x310
276 
277 #define D40_DREG_CLCICR1	0x320
278 #define D40_DREG_CLCICR2	0x324
279 #define D40_DREG_CLCICR3	0x328
280 #define D40_DREG_CLCICR4	0x32C
281 #define D40_DREG_CLCICR5	0x330
282 
283 #define D40_DREG_CLCTIS1	0x340
284 #define D40_DREG_CLCTIS2	0x344
285 #define D40_DREG_CLCTIS3	0x348
286 #define D40_DREG_CLCTIS4	0x34C
287 #define D40_DREG_CLCTIS5	0x350
288 
289 #define D40_DREG_CLCEIS1	0x360
290 #define D40_DREG_CLCEIS2	0x364
291 #define D40_DREG_CLCEIS3	0x368
292 #define D40_DREG_CLCEIS4	0x36C
293 #define D40_DREG_CLCEIS5	0x370
294 
295 #define D40_DREG_CPCMIS		0x380
296 #define D40_DREG_CPCICR		0x384
297 #define D40_DREG_CPCTIS		0x388
298 #define D40_DREG_CPCEIS		0x38C
299 
300 #define D40_DREG_SCCIDA1	0xE80
301 #define D40_DREG_SCCIDA2	0xE90
302 #define D40_DREG_SCCIDA3	0xEA0
303 #define D40_DREG_SCCIDA4	0xEB0
304 #define D40_DREG_SCCIDA5	0xEC0
305 
306 #define D40_DREG_SCCIDB1	0xE84
307 #define D40_DREG_SCCIDB2	0xE94
308 #define D40_DREG_SCCIDB3	0xEA4
309 #define D40_DREG_SCCIDB4	0xEB4
310 #define D40_DREG_SCCIDB5	0xEC4
311 
312 #define D40_DREG_PRSCCIDA	0xF80
313 #define D40_DREG_PRSCCIDB	0xF84
314 
315 #define D40_DREG_STFU		0xFC8
316 #define D40_DREG_ICFG		0xFCC
317 #define D40_DREG_PERIPHID0	0xFE0
318 #define D40_DREG_PERIPHID1	0xFE4
319 #define D40_DREG_PERIPHID2	0xFE8
320 #define D40_DREG_PERIPHID3	0xFEC
321 #define D40_DREG_CELLID0	0xFF0
322 #define D40_DREG_CELLID1	0xFF4
323 #define D40_DREG_CELLID2	0xFF8
324 #define D40_DREG_CELLID3	0xFFC
325 
326 /* LLI related structures */
327 
328 /**
329  * struct d40_phy_lli - The basic configuration register for each physical
330  * channel.
331  *
332  * @reg_cfg: The configuration register.
333  * @reg_elt: The element register.
334  * @reg_ptr: The pointer register.
335  * @reg_lnk: The link register.
336  *
337  * These registers are set up for both physical and logical transfers
338  * Note that the bit in each register means differently in logical and
339  * physical(standard) mode.
340  *
341  * This struct must be 16 bytes aligned, and only contain physical registers
342  * since it will be directly accessed by the DMA.
343  */
344 struct d40_phy_lli {
345 	u32 reg_cfg;
346 	u32 reg_elt;
347 	u32 reg_ptr;
348 	u32 reg_lnk;
349 };
350 
351 /**
352  * struct d40_phy_lli_bidir - struct for a transfer.
353  *
354  * @src: Register settings for src channel.
355  * @dst: Register settings for dst channel.
356  *
357  * All DMA transfers have a source and a destination.
358  */
359 
360 struct d40_phy_lli_bidir {
361 	struct d40_phy_lli	*src;
362 	struct d40_phy_lli	*dst;
363 };
364 
365 
366 /**
367  * struct d40_log_lli - logical lli configuration
368  *
369  * @lcsp02: Either maps to register lcsp0 if src or lcsp2 if dst.
370  * @lcsp13: Either maps to register lcsp1 if src or lcsp3 if dst.
371  *
372  * This struct must be 8 bytes aligned since it will be accessed directy by
373  * the DMA. Never add any none hw mapped registers to this struct.
374  */
375 
376 struct d40_log_lli {
377 	u32 lcsp02;
378 	u32 lcsp13;
379 };
380 
381 /**
382  * struct d40_log_lli_bidir - For both src and dst
383  *
384  * @src: pointer to src lli configuration.
385  * @dst: pointer to dst lli configuration.
386  *
387  * You always have a src and a dst when doing DMA transfers.
388  */
389 
390 struct d40_log_lli_bidir {
391 	struct d40_log_lli *src;
392 	struct d40_log_lli *dst;
393 };
394 
395 /**
396  * struct d40_log_lli_full - LCPA layout
397  *
398  * @lcsp0: Logical Channel Standard Param 0 - Src.
399  * @lcsp1: Logical Channel Standard Param 1 - Src.
400  * @lcsp2: Logical Channel Standard Param 2 - Dst.
401  * @lcsp3: Logical Channel Standard Param 3 - Dst.
402  *
403  * This struct maps to LCPA physical memory layout. Must map to
404  * the hw.
405  */
406 struct d40_log_lli_full {
407 	u32 lcsp0;
408 	u32 lcsp1;
409 	u32 lcsp2;
410 	u32 lcsp3;
411 };
412 
413 /**
414  * struct d40_def_lcsp - Default LCSP1 and LCSP3 settings
415  *
416  * @lcsp3: The default configuration for dst.
417  * @lcsp1: The default configuration for src.
418  */
419 struct d40_def_lcsp {
420 	u32 lcsp3;
421 	u32 lcsp1;
422 };
423 
424 /* Physical channels */
425 
426 enum d40_lli_flags {
427 	LLI_ADDR_INC	= 1 << 0,
428 	LLI_TERM_INT	= 1 << 1,
429 	LLI_CYCLIC	= 1 << 2,
430 	LLI_LAST_LINK	= 1 << 3,
431 };
432 
433 void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
434 		 u32 *src_cfg,
435 		 u32 *dst_cfg);
436 
437 void d40_log_cfg(struct stedma40_chan_cfg *cfg,
438 		 u32 *lcsp1,
439 		 u32 *lcsp2);
440 
441 int d40_phy_sg_to_lli(struct scatterlist *sg,
442 		      int sg_len,
443 		      dma_addr_t target,
444 		      struct d40_phy_lli *lli,
445 		      dma_addr_t lli_phys,
446 		      u32 reg_cfg,
447 		      struct stedma40_half_channel_info *info,
448 		      struct stedma40_half_channel_info *otherinfo,
449 		      unsigned long flags);
450 
451 /* Logical channels */
452 
453 int d40_log_sg_to_lli(struct scatterlist *sg,
454 		      int sg_len,
455 		      dma_addr_t dev_addr,
456 		      struct d40_log_lli *lli_sg,
457 		      u32 lcsp13, /* src or dst*/
458 		      u32 data_width1, u32 data_width2);
459 
460 void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
461 			    struct d40_log_lli *lli_dst,
462 			    struct d40_log_lli *lli_src,
463 			    int next, unsigned int flags);
464 
465 void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
466 			    struct d40_log_lli *lli_dst,
467 			    struct d40_log_lli *lli_src,
468 			    int next, unsigned int flags);
469 
470 #endif /* STE_DMA40_LLI_H */
471