/* * dim2_hal.c - DIM2 HAL implementation * (MediaLB, Device Interface Macro IP, OS62420) * * Copyright (C) 2015, Microchip Technology Germany II GmbH & Co. KG * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * This file is licensed under GPLv2. */ /* Author: Andrey Shvetsov */ #include "dim2_hal.h" #include "dim2_errors.h" #include "dim2_reg.h" #include /* * Size factor for isochronous DBR buffer. * Minimal value is 3. */ #define ISOC_DBR_FACTOR 3u /* * Number of 32-bit units for DBR map. * * 1: block size is 512, max allocation is 16K * 2: block size is 256, max allocation is 8K * 4: block size is 128, max allocation is 4K * 8: block size is 64, max allocation is 2K * * Min allocated space is block size. * Max possible allocated space is 32 blocks. */ #define DBR_MAP_SIZE 2 /* -------------------------------------------------------------------------- */ /* not configurable area */ #define CDT 0x00 #define ADT 0x40 #define MLB_CAT 0x80 #define AHB_CAT 0x88 #define DBR_SIZE (16 * 1024) /* specified by IP */ #define DBR_BLOCK_SIZE (DBR_SIZE / 32 / DBR_MAP_SIZE) /* -------------------------------------------------------------------------- */ /* generic helper functions and macros */ static inline u32 bit_mask(u8 position) { return (u32)1 << position; } static inline bool dim_on_error(u8 error_id, const char *error_message) { dimcb_on_error(error_id, error_message); return false; } /* -------------------------------------------------------------------------- */ /* types and local variables */ struct lld_global_vars_t { bool dim_is_initialized; bool mcm_is_initialized; struct dim2_regs __iomem *dim2; /* DIM2 core base address */ u32 fcnt; u32 dbr_map[DBR_MAP_SIZE]; }; static struct lld_global_vars_t g = { false }; /* -------------------------------------------------------------------------- */ static int dbr_get_mask_size(u16 size) { int i; for (i = 0; i < 6; i++) if (size <= (DBR_BLOCK_SIZE << i)) return 1 << i; return 0; } /** * Allocates DBR memory. * @param size Allocating memory size. * @return Offset in DBR memory by success or DBR_SIZE if out of memory. */ static int alloc_dbr(u16 size) { int mask_size; int i, block_idx = 0; if (size <= 0) return DBR_SIZE; /* out of memory */ mask_size = dbr_get_mask_size(size); if (mask_size == 0) return DBR_SIZE; /* out of memory */ for (i = 0; i < DBR_MAP_SIZE; i++) { u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE; u32 mask = ~((~(u32)0) << blocks); do { if ((g.dbr_map[i] & mask) == 0) { g.dbr_map[i] |= mask; return block_idx * DBR_BLOCK_SIZE; } block_idx += mask_size; /* do shift left with 2 steps in case mask_size == 32 */ mask <<= mask_size - 1; } while ((mask <<= 1) != 0); } return DBR_SIZE; /* out of memory */ } static void free_dbr(int offs, int size) { int block_idx = offs / DBR_BLOCK_SIZE; u32 const blocks = (size + DBR_BLOCK_SIZE - 1) / DBR_BLOCK_SIZE; u32 mask = ~((~(u32)0) << blocks); mask <<= block_idx % 32; g.dbr_map[block_idx / 32] &= ~mask; } /* -------------------------------------------------------------------------- */ static void dim2_transfer_madr(u32 val) { dimcb_io_write(&g.dim2->MADR, val); /* wait for transfer completion */ while ((dimcb_io_read(&g.dim2->MCTL) & 1) != 1) continue; dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */ } static void dim2_clear_dbr(u16 addr, u16 size) { enum { MADR_TB_BIT = 30, MADR_WNR_BIT = 31 }; u16 const end_addr = addr + size; u32 const cmd = bit_mask(MADR_WNR_BIT) | bit_mask(MADR_TB_BIT); dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */ dimcb_io_write(&g.dim2->MDAT0, 0); for (; addr < end_addr; addr++) dim2_transfer_madr(cmd | addr); } static u32 dim2_read_ctr(u32 ctr_addr, u16 mdat_idx) { dim2_transfer_madr(ctr_addr); return dimcb_io_read((&g.dim2->MDAT0) + mdat_idx); } static void dim2_write_ctr_mask(u32 ctr_addr, const u32 *mask, const u32 *value) { enum { MADR_WNR_BIT = 31 }; dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */ if (mask[0] != 0) dimcb_io_write(&g.dim2->MDAT0, value[0]); if (mask[1] != 0) dimcb_io_write(&g.dim2->MDAT1, value[1]); if (mask[2] != 0) dimcb_io_write(&g.dim2->MDAT2, value[2]); if (mask[3] != 0) dimcb_io_write(&g.dim2->MDAT3, value[3]); dimcb_io_write(&g.dim2->MDWE0, mask[0]); dimcb_io_write(&g.dim2->MDWE1, mask[1]); dimcb_io_write(&g.dim2->MDWE2, mask[2]); dimcb_io_write(&g.dim2->MDWE3, mask[3]); dim2_transfer_madr(bit_mask(MADR_WNR_BIT) | ctr_addr); } static inline void dim2_write_ctr(u32 ctr_addr, const u32 *value) { u32 const mask[4] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; dim2_write_ctr_mask(ctr_addr, mask, value); } static inline void dim2_clear_ctr(u32 ctr_addr) { u32 const value[4] = { 0, 0, 0, 0 }; dim2_write_ctr(ctr_addr, value); } static void dim2_configure_cat(u8 cat_base, u8 ch_addr, u8 ch_type, bool read_not_write, bool sync_mfe) { u16 const cat = (read_not_write << CAT_RNW_BIT) | (ch_type << CAT_CT_SHIFT) | (ch_addr << CAT_CL_SHIFT) | (sync_mfe << CAT_MFE_BIT) | (false << CAT_MT_BIT) | (true << CAT_CE_BIT); u8 const ctr_addr = cat_base + ch_addr / 8; u8 const idx = (ch_addr % 8) / 2; u8 const shift = (ch_addr % 2) * 16; u32 mask[4] = { 0, 0, 0, 0 }; u32 value[4] = { 0, 0, 0, 0 }; mask[idx] = (u32)0xFFFF << shift; value[idx] = cat << shift; dim2_write_ctr_mask(ctr_addr, mask, value); } static void dim2_clear_cat(u8 cat_base, u8 ch_addr) { u8 const ctr_addr = cat_base + ch_addr / 8; u8 const idx = (ch_addr % 8) / 2; u8 const shift = (ch_addr % 2) * 16; u32 mask[4] = { 0, 0, 0, 0 }; u32 value[4] = { 0, 0, 0, 0 }; mask[idx] = (u32)0xFFFF << shift; dim2_write_ctr_mask(ctr_addr, mask, value); } static void dim2_configure_cdt(u8 ch_addr, u16 dbr_address, u16 hw_buffer_size, u16 packet_length) { u32 cdt[4] = { 0, 0, 0, 0 }; if (packet_length) cdt[1] = ((packet_length - 1) << CDT1_BS_ISOC_SHIFT); cdt[3] = ((hw_buffer_size - 1) << CDT3_BD_SHIFT) | (dbr_address << CDT3_BA_SHIFT); dim2_write_ctr(CDT + ch_addr, cdt); } static void dim2_clear_cdt(u8 ch_addr) { u32 cdt[4] = { 0, 0, 0, 0 }; dim2_write_ctr(CDT + ch_addr, cdt); } static void dim2_configure_adt(u8 ch_addr) { u32 adt[4] = { 0, 0, 0, 0 }; adt[0] = (true << ADT0_CE_BIT) | (true << ADT0_LE_BIT) | (0 << ADT0_PG_BIT); dim2_write_ctr(ADT + ch_addr, adt); } static void dim2_clear_adt(u8 ch_addr) { u32 adt[4] = { 0, 0, 0, 0 }; dim2_write_ctr(ADT + ch_addr, adt); } static void dim2_start_ctrl_async(u8 ch_addr, u8 idx, u32 buf_addr, u16 buffer_size) { u8 const shift = idx * 16; u32 mask[4] = { 0, 0, 0, 0 }; u32 adt[4] = { 0, 0, 0, 0 }; mask[1] = bit_mask(ADT1_PS_BIT + shift) | bit_mask(ADT1_RDY_BIT + shift) | (ADT1_CTRL_ASYNC_BD_MASK << (ADT1_BD_SHIFT + shift)); adt[1] = (true << (ADT1_PS_BIT + shift)) | (true << (ADT1_RDY_BIT + shift)) | ((buffer_size - 1) << (ADT1_BD_SHIFT + shift)); mask[idx + 2] = 0xFFFFFFFF; adt[idx + 2] = buf_addr; dim2_write_ctr_mask(ADT + ch_addr, mask, adt); } static void dim2_start_isoc_sync(u8 ch_addr, u8 idx, u32 buf_addr, u16 buffer_size) { u8 const shift = idx * 16; u32 mask[4] = { 0, 0, 0, 0 }; u32 adt[4] = { 0, 0, 0, 0 }; mask[1] = bit_mask(ADT1_RDY_BIT + shift) | (ADT1_ISOC_SYNC_BD_MASK << (ADT1_BD_SHIFT + shift)); adt[1] = (true << (ADT1_RDY_BIT + shift)) | ((buffer_size - 1) << (ADT1_BD_SHIFT + shift)); mask[idx + 2] = 0xFFFFFFFF; adt[idx + 2] = buf_addr; dim2_write_ctr_mask(ADT + ch_addr, mask, adt); } static void dim2_clear_ctram(void) { u32 ctr_addr; for (ctr_addr = 0; ctr_addr < 0x90; ctr_addr++) dim2_clear_ctr(ctr_addr); } static void dim2_configure_channel( u8 ch_addr, u8 type, u8 is_tx, u16 dbr_address, u16 hw_buffer_size, u16 packet_length, bool sync_mfe) { dim2_configure_cdt(ch_addr, dbr_address, hw_buffer_size, packet_length); dim2_configure_cat(MLB_CAT, ch_addr, type, is_tx ? 1 : 0, sync_mfe); dim2_configure_adt(ch_addr); dim2_configure_cat(AHB_CAT, ch_addr, type, is_tx ? 0 : 1, sync_mfe); /* unmask interrupt for used channel, enable mlb_sys_int[0] interrupt */ dimcb_io_write(&g.dim2->ACMR0, dimcb_io_read(&g.dim2->ACMR0) | bit_mask(ch_addr)); } static void dim2_clear_channel(u8 ch_addr) { /* mask interrupt for used channel, disable mlb_sys_int[0] interrupt */ dimcb_io_write(&g.dim2->ACMR0, dimcb_io_read(&g.dim2->ACMR0) & ~bit_mask(ch_addr)); dim2_clear_cat(AHB_CAT, ch_addr); dim2_clear_adt(ch_addr); dim2_clear_cat(MLB_CAT, ch_addr); dim2_clear_cdt(ch_addr); /* clear channel status bit */ dimcb_io_write(&g.dim2->ACSR0, bit_mask(ch_addr)); } /* -------------------------------------------------------------------------- */ /* channel state helpers */ static void state_init(struct int_ch_state *state) { state->request_counter = 0; state->service_counter = 0; state->idx1 = 0; state->idx2 = 0; state->level = 0; } /* -------------------------------------------------------------------------- */ /* macro helper functions */ static inline bool check_channel_address(u32 ch_address) { return ch_address > 0 && (ch_address % 2) == 0 && (ch_address / 2) <= (u32)CAT_CL_MASK; } static inline bool check_packet_length(u32 packet_length) { u16 const max_size = ((u16)CDT3_BD_ISOC_MASK + 1u) / ISOC_DBR_FACTOR; if (packet_length <= 0) return false; /* too small */ if (packet_length > max_size) return false; /* too big */ if (packet_length - 1u > (u32)CDT1_BS_ISOC_MASK) return false; /* too big */ return true; } static inline bool check_bytes_per_frame(u32 bytes_per_frame) { u16 const bd_factor = g.fcnt + 2; u16 const max_size = ((u16)CDT3_BD_MASK + 1u) >> bd_factor; if (bytes_per_frame <= 0) return false; /* too small */ if (bytes_per_frame > max_size) return false; /* too big */ return true; } static inline u16 norm_ctrl_async_buffer_size(u16 buf_size) { u16 const max_size = (u16)ADT1_CTRL_ASYNC_BD_MASK + 1u; if (buf_size > max_size) return max_size; return buf_size; } static inline u16 norm_isoc_buffer_size(u16 buf_size, u16 packet_length) { u16 n; u16 const max_size = (u16)ADT1_ISOC_SYNC_BD_MASK + 1u; if (buf_size > max_size) buf_size = max_size; n = buf_size / packet_length; if (n < 2u) return 0; /* too small buffer for given packet_length */ return packet_length * n; } static inline u16 norm_sync_buffer_size(u16 buf_size, u16 bytes_per_frame) { u16 n; u16 const max_size = (u16)ADT1_ISOC_SYNC_BD_MASK + 1u; u32 const unit = bytes_per_frame << g.fcnt; if (buf_size > max_size) buf_size = max_size; n = buf_size / unit; if (n < 1u) return 0; /* too small buffer for given bytes_per_frame */ return unit * n; } static void dim2_cleanup(void) { /* disable MediaLB */ dimcb_io_write(&g.dim2->MLBC0, false << MLBC0_MLBEN_BIT); dim2_clear_ctram(); /* disable mlb_int interrupt */ dimcb_io_write(&g.dim2->MIEN, 0); /* clear status for all dma channels */ dimcb_io_write(&g.dim2->ACSR0, 0xFFFFFFFF); dimcb_io_write(&g.dim2->ACSR1, 0xFFFFFFFF); /* mask interrupts for all channels */ dimcb_io_write(&g.dim2->ACMR0, 0); dimcb_io_write(&g.dim2->ACMR1, 0); } static void dim2_initialize(bool enable_6pin, u8 mlb_clock) { dim2_cleanup(); /* configure and enable MediaLB */ dimcb_io_write(&g.dim2->MLBC0, enable_6pin << MLBC0_MLBPEN_BIT | mlb_clock << MLBC0_MLBCLK_SHIFT | g.fcnt << MLBC0_FCNT_SHIFT | true << MLBC0_MLBEN_BIT); /* activate all HBI channels */ dimcb_io_write(&g.dim2->HCMR0, 0xFFFFFFFF); dimcb_io_write(&g.dim2->HCMR1, 0xFFFFFFFF); /* enable HBI */ dimcb_io_write(&g.dim2->HCTL, bit_mask(HCTL_EN_BIT)); /* configure DMA */ dimcb_io_write(&g.dim2->ACTL, ACTL_DMA_MODE_VAL_DMA_MODE_1 << ACTL_DMA_MODE_BIT | true << ACTL_SCE_BIT); } static bool dim2_is_mlb_locked(void) { u32 const mask0 = bit_mask(MLBC0_MLBLK_BIT); u32 const mask1 = bit_mask(MLBC1_CLKMERR_BIT) | bit_mask(MLBC1_LOCKERR_BIT); u32 const c1 = dimcb_io_read(&g.dim2->MLBC1); u32 const nda_mask = (u32)MLBC1_NDA_MASK << MLBC1_NDA_SHIFT; dimcb_io_write(&g.dim2->MLBC1, c1 & nda_mask); return (dimcb_io_read(&g.dim2->MLBC1) & mask1) == 0 && (dimcb_io_read(&g.dim2->MLBC0) & mask0) != 0; } /* -------------------------------------------------------------------------- */ /* channel help routines */ static inline bool service_channel(u8 ch_addr, u8 idx) { u8 const shift = idx * 16; u32 const adt1 = dim2_read_ctr(ADT + ch_addr, 1); if (((adt1 >> (ADT1_DNE_BIT + shift)) & 1) == 0) return false; { u32 mask[4] = { 0, 0, 0, 0 }; u32 adt_w[4] = { 0, 0, 0, 0 }; mask[1] = bit_mask(ADT1_DNE_BIT + shift) | bit_mask(ADT1_ERR_BIT + shift) | bit_mask(ADT1_RDY_BIT + shift); dim2_write_ctr_mask(ADT + ch_addr, mask, adt_w); } /* clear channel status bit */ dimcb_io_write(&g.dim2->ACSR0, bit_mask(ch_addr)); return true; } /* -------------------------------------------------------------------------- */ /* channel init routines */ static void isoc_init(struct dim_channel *ch, u8 ch_addr, u16 packet_length) { state_init(&ch->state); ch->addr = ch_addr; ch->packet_length = packet_length; ch->bytes_per_frame = 0; ch->done_sw_buffers_number = 0; } static void sync_init(struct dim_channel *ch, u8 ch_addr, u16 bytes_per_frame) { state_init(&ch->state); ch->addr = ch_addr; ch->packet_length = 0; ch->bytes_per_frame = bytes_per_frame; ch->done_sw_buffers_number = 0; } static void channel_init(struct dim_channel *ch, u8 ch_addr) { state_init(&ch->state); ch->addr = ch_addr; ch->packet_length = 0; ch->bytes_per_frame = 0; ch->done_sw_buffers_number = 0; } /* returns true if channel interrupt state is cleared */ static bool channel_service_interrupt(struct dim_channel *ch) { struct int_ch_state *const state = &ch->state; if (!service_channel(ch->addr, state->idx2)) return false; state->idx2 ^= 1; state->request_counter++; return true; } static bool channel_start(struct dim_channel *ch, u32 buf_addr, u16 buf_size) { struct int_ch_state *const state = &ch->state; if (buf_size <= 0) return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE, "Bad buffer size"); if (ch->packet_length == 0 && ch->bytes_per_frame == 0 && buf_size != norm_ctrl_async_buffer_size(buf_size)) return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE, "Bad control/async buffer size"); if (ch->packet_length && buf_size != norm_isoc_buffer_size(buf_size, ch->packet_length)) return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE, "Bad isochronous buffer size"); if (ch->bytes_per_frame && buf_size != norm_sync_buffer_size(buf_size, ch->bytes_per_frame)) return dim_on_error(DIM_ERR_BAD_BUFFER_SIZE, "Bad synchronous buffer size"); if (state->level >= 2u) return dim_on_error(DIM_ERR_OVERFLOW, "Channel overflow"); ++state->level; if (ch->packet_length || ch->bytes_per_frame) dim2_start_isoc_sync(ch->addr, state->idx1, buf_addr, buf_size); else dim2_start_ctrl_async(ch->addr, state->idx1, buf_addr, buf_size); state->idx1 ^= 1; return true; } static u8 channel_service(struct dim_channel *ch) { struct int_ch_state *const state = &ch->state; if (state->service_counter != state->request_counter) { state->service_counter++; if (state->level == 0) return DIM_ERR_UNDERFLOW; --state->level; ch->done_sw_buffers_number++; } return DIM_NO_ERROR; } static bool channel_detach_buffers(struct dim_channel *ch, u16 buffers_number) { if (buffers_number > ch->done_sw_buffers_number) return dim_on_error(DIM_ERR_UNDERFLOW, "Channel underflow"); ch->done_sw_buffers_number -= buffers_number; return true; } /* -------------------------------------------------------------------------- */ /* API */ u8 dim_startup(struct dim2_regs __iomem *dim_base_address, u32 mlb_clock, u32 fcnt) { g.dim_is_initialized = false; if (!dim_base_address) return DIM_INIT_ERR_DIM_ADDR; /* MediaLB clock: 0 - 256 fs, 1 - 512 fs, 2 - 1024 fs, 3 - 2048 fs */ /* MediaLB clock: 4 - 3072 fs, 5 - 4096 fs, 6 - 6144 fs, 7 - 8192 fs */ if (mlb_clock >= 8) return DIM_INIT_ERR_MLB_CLOCK; if (fcnt > MLBC0_FCNT_MAX_VAL) return DIM_INIT_ERR_MLB_CLOCK; g.dim2 = dim_base_address; g.fcnt = fcnt; g.dbr_map[0] = 0; g.dbr_map[1] = 0; dim2_initialize(mlb_clock >= 3, mlb_clock); g.dim_is_initialized = true; return DIM_NO_ERROR; } void dim_shutdown(void) { g.dim_is_initialized = false; dim2_cleanup(); } bool dim_get_lock_state(void) { return dim2_is_mlb_locked(); } static u8 init_ctrl_async(struct dim_channel *ch, u8 type, u8 is_tx, u16 ch_address, u16 hw_buffer_size) { if (!g.dim_is_initialized || !ch) return DIM_ERR_DRIVER_NOT_INITIALIZED; if (!check_channel_address(ch_address)) return DIM_INIT_ERR_CHANNEL_ADDRESS; ch->dbr_size = hw_buffer_size; ch->dbr_addr = alloc_dbr(ch->dbr_size); if (ch->dbr_addr >= DBR_SIZE) return DIM_INIT_ERR_OUT_OF_MEMORY; channel_init(ch, ch_address / 2); dim2_configure_channel(ch->addr, type, is_tx, ch->dbr_addr, ch->dbr_size, 0, false); return DIM_NO_ERROR; } u16 dim_norm_ctrl_async_buffer_size(u16 buf_size) { return norm_ctrl_async_buffer_size(buf_size); } /** * Retrieves maximal possible correct buffer size for isochronous data type * conform to given packet length and not bigger than given buffer size. * * Returns non-zero correct buffer size or zero by error. */ u16 dim_norm_isoc_buffer_size(u16 buf_size, u16 packet_length) { if (!check_packet_length(packet_length)) return 0; return norm_isoc_buffer_size(buf_size, packet_length); } /** * Retrieves maximal possible correct buffer size for synchronous data type * conform to given bytes per frame and not bigger than given buffer size. * * Returns non-zero correct buffer size or zero by error. */ u16 dim_norm_sync_buffer_size(u16 buf_size, u16 bytes_per_frame) { if (!check_bytes_per_frame(bytes_per_frame)) return 0; return norm_sync_buffer_size(buf_size, bytes_per_frame); } u8 dim_init_control(struct dim_channel *ch, u8 is_tx, u16 ch_address, u16 max_buffer_size) { return init_ctrl_async(ch, CAT_CT_VAL_CONTROL, is_tx, ch_address, max_buffer_size); } u8 dim_init_async(struct dim_channel *ch, u8 is_tx, u16 ch_address, u16 max_buffer_size) { return init_ctrl_async(ch, CAT_CT_VAL_ASYNC, is_tx, ch_address, max_buffer_size); } u8 dim_init_isoc(struct dim_channel *ch, u8 is_tx, u16 ch_address, u16 packet_length) { if (!g.dim_is_initialized || !ch) return DIM_ERR_DRIVER_NOT_INITIALIZED; if (!check_channel_address(ch_address)) return DIM_INIT_ERR_CHANNEL_ADDRESS; if (!check_packet_length(packet_length)) return DIM_ERR_BAD_CONFIG; ch->dbr_size = packet_length * ISOC_DBR_FACTOR; ch->dbr_addr = alloc_dbr(ch->dbr_size); if (ch->dbr_addr >= DBR_SIZE) return DIM_INIT_ERR_OUT_OF_MEMORY; isoc_init(ch, ch_address / 2, packet_length); dim2_configure_channel(ch->addr, CAT_CT_VAL_ISOC, is_tx, ch->dbr_addr, ch->dbr_size, packet_length, false); return DIM_NO_ERROR; } u8 dim_init_sync(struct dim_channel *ch, u8 is_tx, u16 ch_address, u16 bytes_per_frame) { u16 bd_factor = g.fcnt + 2; if (!g.dim_is_initialized || !ch) return DIM_ERR_DRIVER_NOT_INITIALIZED; if (!check_channel_address(ch_address)) return DIM_INIT_ERR_CHANNEL_ADDRESS; if (!check_bytes_per_frame(bytes_per_frame)) return DIM_ERR_BAD_CONFIG; ch->dbr_size = bytes_per_frame << bd_factor; ch->dbr_addr = alloc_dbr(ch->dbr_size); if (ch->dbr_addr >= DBR_SIZE) return DIM_INIT_ERR_OUT_OF_MEMORY; sync_init(ch, ch_address / 2, bytes_per_frame); dim2_clear_dbr(ch->dbr_addr, ch->dbr_size); dim2_configure_channel(ch->addr, CAT_CT_VAL_SYNC, is_tx, ch->dbr_addr, ch->dbr_size, 0, true); return DIM_NO_ERROR; } u8 dim_destroy_channel(struct dim_channel *ch) { if (!g.dim_is_initialized || !ch) return DIM_ERR_DRIVER_NOT_INITIALIZED; dim2_clear_channel(ch->addr); if (ch->dbr_addr < DBR_SIZE) free_dbr(ch->dbr_addr, ch->dbr_size); ch->dbr_addr = DBR_SIZE; return DIM_NO_ERROR; } void dim_service_irq(struct dim_channel *const *channels) { bool state_changed; if (!g.dim_is_initialized) { dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED, "DIM is not initialized"); return; } if (!channels) { dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED, "Bad channels"); return; } /* * Use while-loop and a flag to make sure the age is changed back at * least once, otherwise the interrupt may never come if CPU generates * interrupt on changing age. * This cycle runs not more than number of channels, because * channel_service_interrupt() routine doesn't start the channel again. */ do { struct dim_channel *const *ch = channels; state_changed = false; while (*ch) { state_changed |= channel_service_interrupt(*ch); ++ch; } } while (state_changed); /* clear pending Interrupts */ dimcb_io_write(&g.dim2->MS0, 0); dimcb_io_write(&g.dim2->MS1, 0); } u8 dim_service_channel(struct dim_channel *ch) { if (!g.dim_is_initialized || !ch) return DIM_ERR_DRIVER_NOT_INITIALIZED; return channel_service(ch); } struct dim_ch_state_t *dim_get_channel_state(struct dim_channel *ch, struct dim_ch_state_t *state_ptr) { if (!ch || !state_ptr) return NULL; state_ptr->ready = ch->state.level < 2; state_ptr->done_buffers = ch->done_sw_buffers_number; return state_ptr; } bool dim_enqueue_buffer(struct dim_channel *ch, u32 buffer_addr, u16 buffer_size) { if (!ch) return dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED, "Bad channel"); return channel_start(ch, buffer_addr, buffer_size); } bool dim_detach_buffers(struct dim_channel *ch, u16 buffers_number) { if (!ch) return dim_on_error(DIM_ERR_DRIVER_NOT_INITIALIZED, "Bad channel"); return channel_detach_buffers(ch, buffers_number); }