1 // SPDX-License-Identifier: GPL-2.0
3 * hal.c - DIM2 HAL implementation
4 * (MediaLB, Device Interface Macro IP, OS62420)
6 * Copyright (C) 2015-2016, Microchip Technology Germany II GmbH & Co. KG
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
18 * Size factor for isochronous DBR buffer.
21 #define ISOC_DBR_FACTOR 3u
24 * Number of 32-bit units for DBR map.
26 * 1: block size is 512, max allocation is 16K
27 * 2: block size is 256, max allocation is 8K
28 * 4: block size is 128, max allocation is 4K
29 * 8: block size is 64, max allocation is 2K
31 * Min allocated space is block size.
32 * Max possible allocated space is 32 blocks.
34 #define DBR_MAP_SIZE 2
36 /* -------------------------------------------------------------------------- */
37 /* not configurable area */
44 #define DBR_SIZE (16 * 1024) /* specified by IP */
45 #define DBR_BLOCK_SIZE (DBR_SIZE / 32 / DBR_MAP_SIZE)
47 #define ROUND_UP_TO(x, d) (DIV_ROUND_UP(x, (d)) * (d))
49 /* -------------------------------------------------------------------------- */
50 /* generic helper functions and macros */
52 static inline u32 bit_mask(u8 position)
54 return (u32)1 << position;
57 static inline bool dim_on_error(u8 error_id, const char *error_message)
59 dimcb_on_error(error_id, error_message);
63 /* -------------------------------------------------------------------------- */
64 /* types and local variables */
71 u16 sz_queue[CDT0_RPC_MASK + 1];
74 struct lld_global_vars_t {
75 bool dim_is_initialized;
76 bool mcm_is_initialized;
77 struct dim2_regs __iomem *dim2; /* DIM2 core base address */
78 struct async_tx_dbr atx_dbr;
80 u32 dbr_map[DBR_MAP_SIZE];
83 static struct lld_global_vars_t g = { false };
85 /* -------------------------------------------------------------------------- */
87 static int dbr_get_mask_size(u16 size)
91 for (i = 0; i < 6; i++)
92 if (size <= (DBR_BLOCK_SIZE << i))
98 * Allocates DBR memory.
99 * @param size Allocating memory size.
100 * @return Offset in DBR memory by success or DBR_SIZE if out of memory.
102 static int alloc_dbr(u16 size)
105 int i, block_idx = 0;
108 return DBR_SIZE; /* out of memory */
110 mask_size = dbr_get_mask_size(size);
112 return DBR_SIZE; /* out of memory */
114 for (i = 0; i < DBR_MAP_SIZE; i++) {
115 u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
116 u32 mask = ~((~(u32)0) << blocks);
119 if ((g.dbr_map[i] & mask) == 0) {
120 g.dbr_map[i] |= mask;
121 return block_idx * DBR_BLOCK_SIZE;
123 block_idx += mask_size;
124 /* do shift left with 2 steps in case mask_size == 32 */
125 mask <<= mask_size - 1;
126 } while ((mask <<= 1) != 0);
129 return DBR_SIZE; /* out of memory */
132 static void free_dbr(int offs, int size)
134 int block_idx = offs / DBR_BLOCK_SIZE;
135 u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
136 u32 mask = ~((~(u32)0) << blocks);
138 mask <<= block_idx % 32;
139 g.dbr_map[block_idx / 32] &= ~mask;
142 /* -------------------------------------------------------------------------- */
144 static void dim2_transfer_madr(u32 val)
146 dimcb_io_write(&g.dim2->MADR, val);
148 /* wait for transfer completion */
149 while ((dimcb_io_read(&g.dim2->MCTL) & 1) != 1)
152 dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */
155 static void dim2_clear_dbr(u16 addr, u16 size)
157 enum { MADR_TB_BIT = 30, MADR_WNR_BIT = 31 };
159 u16 const end_addr = addr + size;
160 u32 const cmd = bit_mask(MADR_WNR_BIT) | bit_mask(MADR_TB_BIT);
162 dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */
163 dimcb_io_write(&g.dim2->MDAT0, 0);
165 for (; addr < end_addr; addr++)
166 dim2_transfer_madr(cmd | addr);
169 static u32 dim2_read_ctr(u32 ctr_addr, u16 mdat_idx)
171 dim2_transfer_madr(ctr_addr);
173 return dimcb_io_read((&g.dim2->MDAT0) + mdat_idx);
176 static void dim2_write_ctr_mask(u32 ctr_addr, const u32 *mask, const u32 *value)
178 enum { MADR_WNR_BIT = 31 };
180 dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */
183 dimcb_io_write(&g.dim2->MDAT0, value[0]);
185 dimcb_io_write(&g.dim2->MDAT1, value[1]);
187 dimcb_io_write(&g.dim2->MDAT2, value[2]);
189 dimcb_io_write(&g.dim2->MDAT3, value[3]);
191 dimcb_io_write(&g.dim2->MDWE0, mask[0]);
192 dimcb_io_write(&g.dim2->MDWE1, mask[1]);
193 dimcb_io_write(&g.dim2->MDWE2, mask[2]);
194 dimcb_io_write(&g.dim2->MDWE3, mask[3]);
196 dim2_transfer_madr(bit_mask(MADR_WNR_BIT) | ctr_addr);
199 static inline void dim2_write_ctr(u32 ctr_addr, const u32 *value)
201 u32 const mask[4] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
203 dim2_write_ctr_mask(ctr_addr, mask, value);
206 static inline void dim2_clear_ctr(u32 ctr_addr)
208 u32 const value[4] = { 0, 0, 0, 0 };
210 dim2_write_ctr(ctr_addr, value);
213 static void dim2_configure_cat(u8 cat_base, u8 ch_addr, u8 ch_type,
216 bool isoc_fce = ch_type == CAT_CT_VAL_ISOC;
217 bool sync_mfe = ch_type == CAT_CT_VAL_SYNC;
219 (read_not_write << CAT_RNW_BIT) |
220 (ch_type << CAT_CT_SHIFT) |
221 (ch_addr << CAT_CL_SHIFT) |
222 (isoc_fce << CAT_FCE_BIT) |
223 (sync_mfe << CAT_MFE_BIT) |
224 (false << CAT_MT_BIT) |
225 (true << CAT_CE_BIT);
226 u8 const ctr_addr = cat_base + ch_addr / 8;
227 u8 const idx = (ch_addr % 8) / 2;
228 u8 const shift = (ch_addr % 2) * 16;
229 u32 mask[4] = { 0, 0, 0, 0 };
230 u32 value[4] = { 0, 0, 0, 0 };
232 mask[idx] = (u32)0xFFFF << shift;
233 value[idx] = cat << shift;
234 dim2_write_ctr_mask(ctr_addr, mask, value);
237 static void dim2_clear_cat(u8 cat_base, u8 ch_addr)
239 u8 const ctr_addr = cat_base + ch_addr / 8;
240 u8 const idx = (ch_addr % 8) / 2;
241 u8 const shift = (ch_addr % 2) * 16;
242 u32 mask[4] = { 0, 0, 0, 0 };
243 u32 value[4] = { 0, 0, 0, 0 };
245 mask[idx] = (u32)0xFFFF << shift;
246 dim2_write_ctr_mask(ctr_addr, mask, value);
249 static void dim2_configure_cdt(u8 ch_addr, u16 dbr_address, u16 hw_buffer_size,
252 u32 cdt[4] = { 0, 0, 0, 0 };
255 cdt[1] = ((packet_length - 1) << CDT1_BS_ISOC_SHIFT);
258 ((hw_buffer_size - 1) << CDT3_BD_SHIFT) |
259 (dbr_address << CDT3_BA_SHIFT);
260 dim2_write_ctr(CDT + ch_addr, cdt);
263 static u16 dim2_rpc(u8 ch_addr)
265 u32 cdt0 = dim2_read_ctr(CDT + ch_addr, 0);
267 return (cdt0 >> CDT0_RPC_SHIFT) & CDT0_RPC_MASK;
270 static void dim2_clear_cdt(u8 ch_addr)
272 u32 cdt[4] = { 0, 0, 0, 0 };
274 dim2_write_ctr(CDT + ch_addr, cdt);
277 static void dim2_configure_adt(u8 ch_addr)
279 u32 adt[4] = { 0, 0, 0, 0 };
282 (true << ADT0_CE_BIT) |
283 (true << ADT0_LE_BIT) |
286 dim2_write_ctr(ADT + ch_addr, adt);
289 static void dim2_clear_adt(u8 ch_addr)
291 u32 adt[4] = { 0, 0, 0, 0 };
293 dim2_write_ctr(ADT + ch_addr, adt);
296 static void dim2_start_ctrl_async(u8 ch_addr, u8 idx, u32 buf_addr,
299 u8 const shift = idx * 16;
301 u32 mask[4] = { 0, 0, 0, 0 };
302 u32 adt[4] = { 0, 0, 0, 0 };
305 bit_mask(ADT1_PS_BIT + shift) |
306 bit_mask(ADT1_RDY_BIT + shift) |
307 (ADT1_CTRL_ASYNC_BD_MASK << (ADT1_BD_SHIFT + shift));
309 (true << (ADT1_PS_BIT + shift)) |
310 (true << (ADT1_RDY_BIT + shift)) |
311 ((buffer_size - 1) << (ADT1_BD_SHIFT + shift));
313 mask[idx + 2] = 0xFFFFFFFF;
314 adt[idx + 2] = buf_addr;
316 dim2_write_ctr_mask(ADT + ch_addr, mask, adt);
319 static void dim2_start_isoc_sync(u8 ch_addr, u8 idx, u32 buf_addr,
322 u8 const shift = idx * 16;
324 u32 mask[4] = { 0, 0, 0, 0 };
325 u32 adt[4] = { 0, 0, 0, 0 };
328 bit_mask(ADT1_RDY_BIT + shift) |
329 (ADT1_ISOC_SYNC_BD_MASK << (ADT1_BD_SHIFT + shift));
331 (true << (ADT1_RDY_BIT + shift)) |
332 ((buffer_size - 1) << (ADT1_BD_SHIFT + shift));
334 mask[idx + 2] = 0xFFFFFFFF;
335 adt[idx + 2] = buf_addr;
337 dim2_write_ctr_mask(ADT + ch_addr, mask, adt);
340 static void dim2_clear_ctram(void)
344 for (ctr_addr = 0; ctr_addr < 0x90; ctr_addr++)
345 dim2_clear_ctr(ctr_addr);
348 static void dim2_configure_channel(
349 u8 ch_addr, u8 type, u8 is_tx, u16 dbr_address, u16 hw_buffer_size,
352 dim2_configure_cdt(ch_addr, dbr_address, hw_buffer_size, packet_length);
353 dim2_configure_cat(MLB_CAT, ch_addr, type, is_tx ? 1 : 0);
355 dim2_configure_adt(ch_addr);
356 dim2_configure_cat(AHB_CAT, ch_addr, type, is_tx ? 0 : 1);
358 /* unmask interrupt for used channel, enable mlb_sys_int[0] interrupt */
359 dimcb_io_write(&g.dim2->ACMR0,
360 dimcb_io_read(&g.dim2->ACMR0) | bit_mask(ch_addr));
363 static void dim2_clear_channel(u8 ch_addr)
365 /* mask interrupt for used channel, disable mlb_sys_int[0] interrupt */
366 dimcb_io_write(&g.dim2->ACMR0,
367 dimcb_io_read(&g.dim2->ACMR0) & ~bit_mask(ch_addr));
369 dim2_clear_cat(AHB_CAT, ch_addr);
370 dim2_clear_adt(ch_addr);
372 dim2_clear_cat(MLB_CAT, ch_addr);
373 dim2_clear_cdt(ch_addr);
375 /* clear channel status bit */
376 dimcb_io_write(&g.dim2->ACSR0, bit_mask(ch_addr));
379 /* -------------------------------------------------------------------------- */
380 /* trace async tx dbr fill state */
382 static inline u16 norm_pc(u16 pc)
384 return pc & CDT0_RPC_MASK;
387 static void dbrcnt_init(u8 ch_addr, u16 dbr_size)
389 g.atx_dbr.rest_size = dbr_size;
390 g.atx_dbr.rpc = dim2_rpc(ch_addr);
391 g.atx_dbr.wpc = g.atx_dbr.rpc;
394 static void dbrcnt_enq(int buf_sz)
396 g.atx_dbr.rest_size -= buf_sz;
397 g.atx_dbr.sz_queue[norm_pc(g.atx_dbr.wpc)] = buf_sz;
401 u16 dim_dbr_space(struct dim_channel *ch)
404 struct async_tx_dbr *dbr = &g.atx_dbr;
406 if (ch->addr != dbr->ch_addr)
409 cur_rpc = dim2_rpc(ch->addr);
411 while (norm_pc(dbr->rpc) != cur_rpc) {
412 dbr->rest_size += dbr->sz_queue[norm_pc(dbr->rpc)];
416 if ((u16)(dbr->wpc - dbr->rpc) >= CDT0_RPC_MASK)
419 return dbr->rest_size;
422 /* -------------------------------------------------------------------------- */
423 /* channel state helpers */
425 static void state_init(struct int_ch_state *state)
427 state->request_counter = 0;
428 state->service_counter = 0;
435 /* -------------------------------------------------------------------------- */
436 /* macro helper functions */
438 static inline bool check_channel_address(u32 ch_address)
440 return ch_address > 0 && (ch_address % 2) == 0 &&
441 (ch_address / 2) <= (u32)CAT_CL_MASK;
444 static inline bool check_packet_length(u32 packet_length)
446 u16 const max_size = ((u16)CDT3_BD_ISOC_MASK + 1u) / ISOC_DBR_FACTOR;
448 if (packet_length <= 0)
449 return false; /* too small */
451 if (packet_length > max_size)
452 return false; /* too big */
454 if (packet_length - 1u > (u32)CDT1_BS_ISOC_MASK)
455 return false; /* too big */
460 static inline bool check_bytes_per_frame(u32 bytes_per_frame)
462 u16 const bd_factor = g.fcnt + 2;
463 u16 const max_size = ((u16)CDT3_BD_MASK + 1u) >> bd_factor;
465 if (bytes_per_frame <= 0)
466 return false; /* too small */
468 if (bytes_per_frame > max_size)
469 return false; /* too big */
474 static inline u16 norm_ctrl_async_buffer_size(u16 buf_size)
476 u16 const max_size = (u16)ADT1_CTRL_ASYNC_BD_MASK + 1u;
478 if (buf_size > max_size)
484 static inline u16 norm_isoc_buffer_size(u16 buf_size, u16 packet_length)
487 u16 const max_size = (u16)ADT1_ISOC_SYNC_BD_MASK + 1u;
489 if (buf_size > max_size)
492 n = buf_size / packet_length;
495 return 0; /* too small buffer for given packet_length */
497 return packet_length * n;
500 static inline u16 norm_sync_buffer_size(u16 buf_size, u16 bytes_per_frame)
503 u16 const max_size = (u16)ADT1_ISOC_SYNC_BD_MASK + 1u;
504 u32 const unit = bytes_per_frame << g.fcnt;
506 if (buf_size > max_size)
512 return 0; /* too small buffer for given bytes_per_frame */
517 static void dim2_cleanup(void)
519 /* disable MediaLB */
520 dimcb_io_write(&g.dim2->MLBC0, false << MLBC0_MLBEN_BIT);
524 /* disable mlb_int interrupt */
525 dimcb_io_write(&g.dim2->MIEN, 0);
527 /* clear status for all dma channels */
528 dimcb_io_write(&g.dim2->ACSR0, 0xFFFFFFFF);
529 dimcb_io_write(&g.dim2->ACSR1, 0xFFFFFFFF);
531 /* mask interrupts for all channels */
532 dimcb_io_write(&g.dim2->ACMR0, 0);
533 dimcb_io_write(&g.dim2->ACMR1, 0);
536 static void dim2_initialize(bool enable_6pin, u8 mlb_clock)
540 /* configure and enable MediaLB */
541 dimcb_io_write(&g.dim2->MLBC0,
542 enable_6pin << MLBC0_MLBPEN_BIT |
543 mlb_clock << MLBC0_MLBCLK_SHIFT |
544 g.fcnt << MLBC0_FCNT_SHIFT |
545 true << MLBC0_MLBEN_BIT);
547 /* activate all HBI channels */
548 dimcb_io_write(&g.dim2->HCMR0, 0xFFFFFFFF);
549 dimcb_io_write(&g.dim2->HCMR1, 0xFFFFFFFF);
552 dimcb_io_write(&g.dim2->HCTL, bit_mask(HCTL_EN_BIT));
555 dimcb_io_write(&g.dim2->ACTL,
556 ACTL_DMA_MODE_VAL_DMA_MODE_1 << ACTL_DMA_MODE_BIT |
557 true << ACTL_SCE_BIT);
560 static bool dim2_is_mlb_locked(void)
562 u32 const mask0 = bit_mask(MLBC0_MLBLK_BIT);
563 u32 const mask1 = bit_mask(MLBC1_CLKMERR_BIT) |
564 bit_mask(MLBC1_LOCKERR_BIT);
565 u32 const c1 = dimcb_io_read(&g.dim2->MLBC1);
566 u32 const nda_mask = (u32)MLBC1_NDA_MASK << MLBC1_NDA_SHIFT;
568 dimcb_io_write(&g.dim2->MLBC1, c1 & nda_mask);
569 return (dimcb_io_read(&g.dim2->MLBC1) & mask1) == 0 &&
570 (dimcb_io_read(&g.dim2->MLBC0) & mask0) != 0;
573 /* -------------------------------------------------------------------------- */
574 /* channel help routines */
576 static inline bool service_channel(u8 ch_addr, u8 idx)
578 u8 const shift = idx * 16;
579 u32 const adt1 = dim2_read_ctr(ADT + ch_addr, 1);
580 u32 mask[4] = { 0, 0, 0, 0 };
581 u32 adt_w[4] = { 0, 0, 0, 0 };
583 if (((adt1 >> (ADT1_DNE_BIT + shift)) & 1) == 0)
587 bit_mask(ADT1_DNE_BIT + shift) |
588 bit_mask(ADT1_ERR_BIT + shift) |
589 bit_mask(ADT1_RDY_BIT + shift);
590 dim2_write_ctr_mask(ADT + ch_addr, mask, adt_w);
592 /* clear channel status bit */
593 dimcb_io_write(&g.dim2->ACSR0, bit_mask(ch_addr));
598 /* -------------------------------------------------------------------------- */
599 /* channel init routines */
601 static void isoc_init(struct dim_channel *ch, u8 ch_addr, u16 packet_length)
603 state_init(&ch->state);
607 ch->packet_length = packet_length;
608 ch->bytes_per_frame = 0;
609 ch->done_sw_buffers_number = 0;
612 static void sync_init(struct dim_channel *ch, u8 ch_addr, u16 bytes_per_frame)
614 state_init(&ch->state);
618 ch->packet_length = 0;
619 ch->bytes_per_frame = bytes_per_frame;
620 ch->done_sw_buffers_number = 0;
623 static void channel_init(struct dim_channel *ch, u8 ch_addr)
625 state_init(&ch->state);
629 ch->packet_length = 0;
630 ch->bytes_per_frame = 0;
631 ch->done_sw_buffers_number = 0;
634 /* returns true if channel interrupt state is cleared */
635 static bool channel_service_interrupt(struct dim_channel *ch)
637 struct int_ch_state *const state = &ch->state;
639 if (!service_channel(ch->addr, state->idx2))
643 state->request_counter++;
647 static bool channel_start(struct dim_channel *ch, u32 buf_addr, u16 buf_size)
649 struct int_ch_state *const state = &ch->state;
652 return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE, "Bad buffer size");
654 if (ch->packet_length == 0 && ch->bytes_per_frame == 0 &&
655 buf_size != norm_ctrl_async_buffer_size(buf_size))
656 return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE,
657 "Bad control/async buffer size");
659 if (ch->packet_length &&
660 buf_size != norm_isoc_buffer_size(buf_size, ch->packet_length))
661 return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE,
662 "Bad isochronous buffer size");
664 if (ch->bytes_per_frame &&
665 buf_size != norm_sync_buffer_size(buf_size, ch->bytes_per_frame))
666 return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE,
667 "Bad synchronous buffer size");
669 if (state->level >= 2u)
670 return dim_on_error(DIM_ERR_OVERFLOW, "Channel overflow");
674 if (ch->addr == g.atx_dbr.ch_addr)
675 dbrcnt_enq(buf_size);
677 if (ch->packet_length || ch->bytes_per_frame)
678 dim2_start_isoc_sync(ch->addr, state->idx1, buf_addr, buf_size);
680 dim2_start_ctrl_async(ch->addr, state->idx1, buf_addr,
687 static u8 channel_service(struct dim_channel *ch)
689 struct int_ch_state *const state = &ch->state;
691 if (state->service_counter != state->request_counter) {
692 state->service_counter++;
693 if (state->level == 0)
694 return DIM_ERR_UNDERFLOW;
697 ch->done_sw_buffers_number++;
703 static bool channel_detach_buffers(struct dim_channel *ch, u16 buffers_number)
705 if (buffers_number > ch->done_sw_buffers_number)
706 return dim_on_error(DIM_ERR_UNDERFLOW, "Channel underflow");
708 ch->done_sw_buffers_number -= buffers_number;
712 /* -------------------------------------------------------------------------- */
715 u8 dim_startup(struct dim2_regs __iomem *dim_base_address, u32 mlb_clock,
718 g.dim_is_initialized = false;
720 if (!dim_base_address)
721 return DIM_INIT_ERR_DIM_ADDR;
723 /* MediaLB clock: 0 - 256 fs, 1 - 512 fs, 2 - 1024 fs, 3 - 2048 fs */
724 /* MediaLB clock: 4 - 3072 fs, 5 - 4096 fs, 6 - 6144 fs, 7 - 8192 fs */
726 return DIM_INIT_ERR_MLB_CLOCK;
728 if (fcnt > MLBC0_FCNT_MAX_VAL)
729 return DIM_INIT_ERR_MLB_CLOCK;
731 g.dim2 = dim_base_address;
736 dim2_initialize(mlb_clock >= 3, mlb_clock);
738 g.dim_is_initialized = true;
743 void dim_shutdown(void)
745 g.dim_is_initialized = false;
749 bool dim_get_lock_state(void)
751 return dim2_is_mlb_locked();
754 static u8 init_ctrl_async(struct dim_channel *ch, u8 type, u8 is_tx,
755 u16 ch_address, u16 hw_buffer_size)
757 if (!g.dim_is_initialized || !ch)
758 return DIM_ERR_DRIVER_NOT_INITIALIZED;
760 if (!check_channel_address(ch_address))
761 return DIM_INIT_ERR_CHANNEL_ADDRESS;
764 ch->dbr_size = ROUND_UP_TO(hw_buffer_size, DBR_BLOCK_SIZE);
765 ch->dbr_addr = alloc_dbr(ch->dbr_size);
766 if (ch->dbr_addr >= DBR_SIZE)
767 return DIM_INIT_ERR_OUT_OF_MEMORY;
769 channel_init(ch, ch_address / 2);
771 dim2_configure_channel(ch->addr, type, is_tx,
772 ch->dbr_addr, ch->dbr_size, 0);
777 void dim_service_mlb_int_irq(void)
779 dimcb_io_write(&g.dim2->MS0, 0);
780 dimcb_io_write(&g.dim2->MS1, 0);
783 u16 dim_norm_ctrl_async_buffer_size(u16 buf_size)
785 return norm_ctrl_async_buffer_size(buf_size);
789 * Retrieves maximal possible correct buffer size for isochronous data type
790 * conform to given packet length and not bigger than given buffer size.
792 * Returns non-zero correct buffer size or zero by error.
794 u16 dim_norm_isoc_buffer_size(u16 buf_size, u16 packet_length)
796 if (!check_packet_length(packet_length))
799 return norm_isoc_buffer_size(buf_size, packet_length);
803 * Retrieves maximal possible correct buffer size for synchronous data type
804 * conform to given bytes per frame and not bigger than given buffer size.
806 * Returns non-zero correct buffer size or zero by error.
808 u16 dim_norm_sync_buffer_size(u16 buf_size, u16 bytes_per_frame)
810 if (!check_bytes_per_frame(bytes_per_frame))
813 return norm_sync_buffer_size(buf_size, bytes_per_frame);
816 u8 dim_init_control(struct dim_channel *ch, u8 is_tx, u16 ch_address,
819 return init_ctrl_async(ch, CAT_CT_VAL_CONTROL, is_tx, ch_address,
823 u8 dim_init_async(struct dim_channel *ch, u8 is_tx, u16 ch_address,
826 u8 ret = init_ctrl_async(ch, CAT_CT_VAL_ASYNC, is_tx, ch_address,
829 if (is_tx && !g.atx_dbr.ch_addr) {
830 g.atx_dbr.ch_addr = ch->addr;
831 dbrcnt_init(ch->addr, ch->dbr_size);
832 dimcb_io_write(&g.dim2->MIEN, bit_mask(20));
838 u8 dim_init_isoc(struct dim_channel *ch, u8 is_tx, u16 ch_address,
841 if (!g.dim_is_initialized || !ch)
842 return DIM_ERR_DRIVER_NOT_INITIALIZED;
844 if (!check_channel_address(ch_address))
845 return DIM_INIT_ERR_CHANNEL_ADDRESS;
847 if (!check_packet_length(packet_length))
848 return DIM_ERR_BAD_CONFIG;
851 ch->dbr_size = packet_length * ISOC_DBR_FACTOR;
852 ch->dbr_addr = alloc_dbr(ch->dbr_size);
853 if (ch->dbr_addr >= DBR_SIZE)
854 return DIM_INIT_ERR_OUT_OF_MEMORY;
856 isoc_init(ch, ch_address / 2, packet_length);
858 dim2_configure_channel(ch->addr, CAT_CT_VAL_ISOC, is_tx, ch->dbr_addr,
859 ch->dbr_size, packet_length);
864 u8 dim_init_sync(struct dim_channel *ch, u8 is_tx, u16 ch_address,
867 u16 bd_factor = g.fcnt + 2;
869 if (!g.dim_is_initialized || !ch)
870 return DIM_ERR_DRIVER_NOT_INITIALIZED;
872 if (!check_channel_address(ch_address))
873 return DIM_INIT_ERR_CHANNEL_ADDRESS;
875 if (!check_bytes_per_frame(bytes_per_frame))
876 return DIM_ERR_BAD_CONFIG;
879 ch->dbr_size = bytes_per_frame << bd_factor;
880 ch->dbr_addr = alloc_dbr(ch->dbr_size);
881 if (ch->dbr_addr >= DBR_SIZE)
882 return DIM_INIT_ERR_OUT_OF_MEMORY;
884 sync_init(ch, ch_address / 2, bytes_per_frame);
886 dim2_clear_dbr(ch->dbr_addr, ch->dbr_size);
887 dim2_configure_channel(ch->addr, CAT_CT_VAL_SYNC, is_tx,
888 ch->dbr_addr, ch->dbr_size, 0);
893 u8 dim_destroy_channel(struct dim_channel *ch)
895 if (!g.dim_is_initialized || !ch)
896 return DIM_ERR_DRIVER_NOT_INITIALIZED;
898 if (ch->addr == g.atx_dbr.ch_addr) {
899 dimcb_io_write(&g.dim2->MIEN, 0);
900 g.atx_dbr.ch_addr = 0;
903 dim2_clear_channel(ch->addr);
904 if (ch->dbr_addr < DBR_SIZE)
905 free_dbr(ch->dbr_addr, ch->dbr_size);
906 ch->dbr_addr = DBR_SIZE;
911 void dim_service_ahb_int_irq(struct dim_channel *const *channels)
915 if (!g.dim_is_initialized) {
916 dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED,
917 "DIM is not initialized");
922 dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED, "Bad channels");
927 * Use while-loop and a flag to make sure the age is changed back at
928 * least once, otherwise the interrupt may never come if CPU generates
929 * interrupt on changing age.
930 * This cycle runs not more than number of channels, because
931 * channel_service_interrupt() routine doesn't start the channel again.
934 struct dim_channel *const *ch = channels;
936 state_changed = false;
939 state_changed |= channel_service_interrupt(*ch);
942 } while (state_changed);
945 u8 dim_service_channel(struct dim_channel *ch)
947 if (!g.dim_is_initialized || !ch)
948 return DIM_ERR_DRIVER_NOT_INITIALIZED;
950 return channel_service(ch);
953 struct dim_ch_state_t *dim_get_channel_state(struct dim_channel *ch,
954 struct dim_ch_state_t *state_ptr)
956 if (!ch || !state_ptr)
959 state_ptr->ready = ch->state.level < 2;
960 state_ptr->done_buffers = ch->done_sw_buffers_number;
965 bool dim_enqueue_buffer(struct dim_channel *ch, u32 buffer_addr,
969 return dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED,
972 return channel_start(ch, buffer_addr, buffer_size);
975 bool dim_detach_buffers(struct dim_channel *ch, u16 buffers_number)
978 return dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED,
981 return channel_detach_buffers(ch, buffers_number);