+++ /dev/null
-/*
- * 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 <andrey.shvetsov@k2l.de> */
-
-#include "dim2_hal.h"
-#include "dim2_errors.h"
-#include "dim2_reg.h"
-#include <linux/stddef.h>
-
-/*
- * The number of frames per sub-buffer for synchronous channels.
- * Allowed values: 1, 2, 4, 8, 16, 32, 64.
- */
-#define FRAMES_PER_SUBBUFF 16
-
-/*
- * Size factor for synchronous DBR buffer.
- * Minimal value is 4*FRAMES_PER_SUBBUFF.
- */
-#define SYNC_DBR_FACTOR (4u * (u16)FRAMES_PER_SUBBUFF)
-
-/*
- * 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 */
-
-#define MLBC0_FCNT_VAL_MACRO(n) MLBC0_FCNT_VAL_ ## n ## FPSB
-#define MLBC0_FCNT_VAL(fpsb) MLBC0_FCNT_VAL_MACRO(fpsb)
-
-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 *dim2; /* DIM2 core base address */
- 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 u32 dim2_read_ctr(u32 ctr_addr, u16 mdat_idx)
-{
- dimcb_io_write(&g.dim2->MADR, ctr_addr);
-
- /* wait till transfer is completed */
- while ((dimcb_io_read(&g.dim2->MCTL) & 1) != 1)
- continue;
-
- dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */
-
- 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]);
-
- dimcb_io_write(&g.dim2->MADR, bit_mask(MADR_WNR_BIT) | ctr_addr);
-
- /* wait till transfer is completed */
- while ((dimcb_io_read(&g.dim2->MCTL) & 1) != 1)
- continue;
-
- dimcb_io_write(&g.dim2->MCTL, 0); /* clear transfer complete */
-}
-
-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);
-}
-
-/* -------------------------------------------------------------------------- */
-/* 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 max_size = ((u16)CDT3_BD_MASK + 1u) / SYNC_DBR_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 * (u16)FRAMES_PER_SUBBUFF;
-
- 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 |
- MLBC0_FCNT_VAL(FRAMES_PER_SUBBUFF) << 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(void *dim_base_address, u32 mlb_clock)
-{
- 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;
-
- g.dim2 = dim_base_address;
- 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)
-{
- 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 * SYNC_DBR_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_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);
-}
Code Review / AGL / meta-agl-demo.git / blobdiff