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esp-idf/components/soc/src/esp32/sdio_slave_hal.c

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// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// The HAL layer for SDIO slave (common part)
#include <soc/slc_struct.h>
#include <soc/hinf_struct.h>
#include <hal/sdio_slave_types.h>
#include <soc/host_struct.h>
#include <string.h>
#include "hal/sdio_slave_hal.h"
#include "hal/hal_defs.h"
#include "esp_attr.h"
#define SDIO_SLAVE_CHECK(res, str, ret_val) do { if(!(res)){\
HAL_LOGE(TAG, "%s", str);\
return ret_val;\
} }while (0)
static const char TAG[] = "SDIO_HAL";
static esp_err_t init_send_queue(sdio_slave_context_t *hal);
/**************** Ring buffer for SDIO sending use *****************/
typedef enum {
RINGBUF_GET_ONE = 0,
RINGBUF_GET_ALL = 1,
} ringbuf_get_all_t;
typedef enum {
RINGBUF_WRITE_PTR,
RINGBUF_READ_PTR,
RINGBUF_FREE_PTR,
} sdio_ringbuf_pointer_t;
static esp_err_t sdio_ringbuf_send(sdio_ringbuf_t *buf, esp_err_t (*copy_callback)(uint8_t *, void *), void *arg);
static inline esp_err_t sdio_ringbuf_recv(sdio_ringbuf_t *buf, uint8_t **start, uint8_t **end, ringbuf_get_all_t get_all);
static inline int sdio_ringbuf_return(sdio_ringbuf_t* buf, uint8_t *ptr);
#define _SEND_DESC_NEXT(x) STAILQ_NEXT(&((sdio_slave_hal_send_desc_t*)x)->dma_desc, qe)
#define SEND_DESC_NEXT(x) (sdio_slave_hal_send_desc_t*)_SEND_DESC_NEXT(x)
#define SEND_DESC_NEXT_SET(x, target) do { \
_SEND_DESC_NEXT(x)=(lldesc_t*)target; \
}while(0)
static esp_err_t link_desc_to_last(uint8_t* desc, void* arg)
{
SEND_DESC_NEXT_SET(arg, desc);
return ESP_OK;
}
//calculate a pointer with offset to a original pointer of the specific ringbuffer
static inline uint8_t* sdio_ringbuf_offset_ptr(sdio_ringbuf_t *buf, sdio_ringbuf_pointer_t ptr, uint32_t offset)
{
uint8_t *buf_ptr;
switch (ptr) {
case RINGBUF_WRITE_PTR:
buf_ptr = buf->write_ptr;
break;
case RINGBUF_READ_PTR:
buf_ptr = buf->read_ptr;
break;
case RINGBUF_FREE_PTR:
buf_ptr = buf->free_ptr;
break;
default:
abort();
}
uint8_t *offset_ptr=buf_ptr+offset;
if (offset_ptr >= buf->data + buf->size) {
offset_ptr -= buf->size;
}
return offset_ptr;
}
static esp_err_t sdio_ringbuf_send(sdio_ringbuf_t *buf, esp_err_t (*copy_callback)(uint8_t *, void *), void *arg)
{
uint8_t* get_ptr = sdio_ringbuf_offset_ptr(buf, RINGBUF_WRITE_PTR, SDIO_SLAVE_SEND_DESC_SIZE);
esp_err_t err = ESP_OK;
if (copy_callback) {
(*copy_callback)(get_ptr, arg);
}
if (err != ESP_OK) return err;
buf->write_ptr = get_ptr;
return ESP_OK;
}
// this ringbuf is a return-before-recv-again strategy
// since this is designed to be called in the ISR, no parallel logic
static inline esp_err_t sdio_ringbuf_recv(sdio_ringbuf_t *buf, uint8_t **start, uint8_t **end, ringbuf_get_all_t get_all)
{
assert(buf->free_ptr == buf->read_ptr); //must return before recv again
if (start == NULL && end == NULL) return ESP_ERR_INVALID_ARG; // must have a output
if (buf->read_ptr == buf->write_ptr) return ESP_ERR_NOT_FOUND; // no data
uint8_t *get_start = sdio_ringbuf_offset_ptr(buf, RINGBUF_READ_PTR, SDIO_SLAVE_SEND_DESC_SIZE);
if (get_all != RINGBUF_GET_ONE) {
buf->read_ptr = buf->write_ptr;
} else {
buf->read_ptr = get_start;
}
if (start != NULL) {
*start = get_start;
}
if (end != NULL) {
*end = buf->read_ptr;
}
return ESP_OK;
}
static inline int sdio_ringbuf_return(sdio_ringbuf_t* buf, uint8_t *ptr)
{
assert(sdio_ringbuf_offset_ptr(buf, RINGBUF_FREE_PTR, SDIO_SLAVE_SEND_DESC_SIZE) == ptr);
int size = (buf->read_ptr + buf->size - buf->free_ptr) % buf->size;
int count = size / SDIO_SLAVE_SEND_DESC_SIZE;
assert(count * SDIO_SLAVE_SEND_DESC_SIZE==size);
buf->free_ptr = buf->read_ptr;
return count;
}
static inline uint8_t* sdio_ringbuf_peek_front(sdio_ringbuf_t* buf)
{
if (buf->read_ptr != buf->write_ptr) {
return sdio_ringbuf_offset_ptr(buf, RINGBUF_READ_PTR, SDIO_SLAVE_SEND_DESC_SIZE);
} else {
return NULL;
}
}
static inline uint8_t* sdio_ringbuf_peek_rear(sdio_ringbuf_t *buf)
{
return buf->write_ptr;
}
static inline bool sdio_ringbuf_empty(sdio_ringbuf_t* buf)
{
return (buf->read_ptr == buf->write_ptr);
}
/**************** End of Ring buffer *****************/
void sdio_slave_hal_init(sdio_slave_context_t *hal)
{
hal->host = sdio_slave_ll_get_host(0);
hal->slc = sdio_slave_ll_get_slc(0);
hal->hinf = sdio_slave_ll_get_hinf(0);
hal->send_state = STATE_IDLE;
hal->recv_link_list = (sdio_slave_hal_recv_stailq_t)STAILQ_HEAD_INITIALIZER(hal->recv_link_list);
init_send_queue(hal);
}
void sdio_slave_hal_hw_init(sdio_slave_context_t *hal)
{
sdio_slave_ll_init(hal->slc);
sdio_slave_ll_enable_hs(hal->hinf, true);
sdio_slave_ll_set_timing(hal->host, hal->timing);
sdio_slave_ll_slvint_t intr_ena = 0xff;
sdio_slave_ll_slvint_set_ena(hal->slc, &intr_ena);
}
static esp_err_t init_send_queue(sdio_slave_context_t *hal)
{
esp_err_t ret;
esp_err_t rcv_res;
sdio_ringbuf_t *buf = &(hal->send_desc_queue);
//initialize pointers
buf->write_ptr = buf->data;
buf->read_ptr = buf->data;
buf->free_ptr = buf->data;
sdio_slave_hal_send_desc_t *first = NULL, *last = NULL;
//no copy for the first descriptor
ret = sdio_ringbuf_send(buf, NULL, NULL);
if (ret != ESP_OK) return ret;
//loop in the ringbuf to link all the desc one after another as a ring
for (int i = 0; i < hal->send_queue_size + 1; i++) {
rcv_res = sdio_ringbuf_recv(buf, (uint8_t **) &last, NULL, RINGBUF_GET_ONE);
assert (rcv_res == ESP_OK);
ret = sdio_ringbuf_send(buf, link_desc_to_last, last);
if (ret != ESP_OK) return ret;
sdio_ringbuf_return(buf, (uint8_t *) last);
}
first = NULL;
last = NULL;
//clear the queue
rcv_res = sdio_ringbuf_recv(buf, (uint8_t **) &first, (uint8_t **) &last, RINGBUF_GET_ALL);
assert (rcv_res == ESP_OK);
assert(first == last); //there should be only one desc remain
sdio_ringbuf_return(buf, (uint8_t *) first);
return ESP_OK;
}
void sdio_slave_hal_set_ioready(sdio_slave_context_t *hal, bool ready)
{
sdio_slave_ll_set_ioready(hal->hinf, ready); //set IO ready to 1 to allow host to use
}
/*---------------------------------------------------------------------------
* Send
*
* The hardware has a cache, so that once a descriptor is loaded onto the linked-list, it cannot be modified
* until returned (used) by the hardware. This forbids us from loading descriptors onto the linked list during
* the transfer (or the time waiting for host to start a transfer). However, we use a "ringbuffer" (different from
* the one in ``freertos/`` folder) holding descriptors to solve this:
* 1. The driver allocates continuous memory for several buffer descriptors (the maximum buffer number) during
* initialization. Then the driver points the STAILQ_NEXT pointer of all the descriptors except the last one
* to the next descriptor of each of them. Then the pointer of the last descriptor points back to the first one:
* now the descriptor is in a ring.
* 2. The "ringbuffer" has a write pointer points to where app can write new descriptor. The app writes the new descriptor
* indicated by the write pointer without touching the STAILQ_NEXT pointer so that the descriptors are always in a
* ring-like linked-list. The app never touches the part of linked-list being used by the hardware.
* 3. When the hardware needs some data to send, it automatically pick a part of linked descriptors. According to the mode:
* - Buffer mode: only pick the next one to the last one sent;
* - Stream mode: pick the whole unsent linked list, starting from the one above, to the latest linked one.
* The driver removes the STAILQ_NEXT pointer of the last descriptor and put the head of the part to the DMA controller so
* that it looks like just a linear linked-list rather than a ring to the hardware.
* 4. The counter of sending FIFO can increase when app load new buffers (in STREAM_MODE) or when new transfer should
* start (in PACKET_MODE).
* 5. When the sending transfer is finished, the driver goes through the descriptors just send in the ISR and push all
* the ``arg`` member of descriptors to the queue back to the app, so that the app can handle finished buffers. The
* driver also fix the STAILQ_NEXT pointer of the last descriptor so that the descriptors are now in a ring again.
----------------------------------------------------------------------------*/
static inline void send_set_state(sdio_slave_context_t *hal, send_state_t state)
{
hal->send_state = state;
}
static inline send_state_t send_get_state(sdio_slave_context_t* hal)
{
return hal->send_state;
}
DMA_ATTR static const lldesc_t start_desc = {
.owner = 1,
.buf = (void*)0x3ffbbbbb, //assign a dma-capable pointer other than NULL, which will not be used
.size = 1,
.length = 1,
.eof = 1,
};
//force trigger rx_done interrupt. the interrupt is abused to invoke ISR from the app by the enable bit and never cleared.
static void send_isr_invoker_enable(const sdio_slave_context_t *hal)
{
sdio_slave_ll_send_reset(hal->slc);
sdio_slave_ll_send_start(hal->slc, &start_desc);
//wait for rx_done
while(!sdio_slave_ll_send_invoker_ready(hal->slc));
sdio_slave_ll_send_stop(hal->slc);
sdio_slave_ll_send_hostint_clr(hal->host);
}
static void send_isr_invoker_disable(sdio_slave_context_t *hal)
{
sdio_slave_ll_send_part_done_clear(hal->slc);
}
void sdio_slave_hal_send_handle_isr_invoke(sdio_slave_context_t *hal)
{
sdio_slave_ll_send_part_done_intr_ena(hal->slc, false);
}
//start hw operation with existing data (if exist)
esp_err_t sdio_slave_hal_send_start(sdio_slave_context_t *hal)
{
SDIO_SLAVE_CHECK(send_get_state(hal) == STATE_IDLE,
"already started", ESP_ERR_INVALID_STATE);
send_set_state(hal, STATE_WAIT_FOR_START);
send_isr_invoker_enable(hal);
sdio_slave_ll_send_intr_clr(hal->slc);
sdio_slave_ll_send_intr_ena(hal->slc, true);
return ESP_OK;
}
//only stop hw operations, no touch to data as well as counter
void sdio_slave_hal_send_stop(sdio_slave_context_t *hal)
{
sdio_slave_ll_send_stop(hal->slc);
send_isr_invoker_disable(hal);
sdio_slave_ll_send_intr_ena(hal->slc, false);
send_set_state(hal, STATE_IDLE);
}
static void send_new_packet(sdio_slave_context_t *hal)
{
// since eof is changed, we have to stop and reset the link list,
// and restart new link list operation
sdio_slave_hal_send_desc_t *const start_desc = hal->in_flight_head;
sdio_slave_hal_send_desc_t *const end_desc = hal->in_flight_end;
assert(start_desc != NULL && end_desc != NULL);
sdio_slave_ll_send_stop(hal->slc);
sdio_slave_ll_send_reset(hal->slc);
sdio_slave_ll_send_start(hal->slc, (lldesc_t*)start_desc);
// update pkt_len register to allow host reading.
sdio_slave_ll_send_write_len(hal->slc, end_desc->pkt_len);
ESP_EARLY_LOGV(TAG, "send_length_write: %d, last_len: %08X", end_desc->pkt_len, sdio_slave_ll_send_read_len(hal->host));
send_set_state(hal, STATE_SENDING);
ESP_EARLY_LOGD(TAG, "restart new send: %p->%p, pkt_len: %d", start_desc, end_desc, end_desc->pkt_len);
}
static esp_err_t send_check_new_packet(sdio_slave_context_t *hal)
{
esp_err_t ret;
sdio_slave_hal_send_desc_t *start = NULL;
sdio_slave_hal_send_desc_t *end = NULL;
if (hal->sending_mode == SDIO_SLAVE_SEND_PACKET) {
ret = sdio_ringbuf_recv(&(hal->send_desc_queue), (uint8_t **) &start, (uint8_t **) &end, RINGBUF_GET_ONE);
} else { //stream mode
ret = sdio_ringbuf_recv(&(hal->send_desc_queue), (uint8_t **) &start, (uint8_t **) &end, RINGBUF_GET_ALL);
}
if (ret == ESP_OK) {
hal->in_flight_head = start;
hal->in_flight_end = end;
end->dma_desc.eof = 1;
//temporarily break the link ring here, the ring will be re-connected in ``send_isr_eof()``.
hal->in_flight_next = SEND_DESC_NEXT(end);
SEND_DESC_NEXT_SET(end, NULL);
}
return ESP_OK;
}
bool sdio_slave_hal_send_eof_happened(sdio_slave_context_t* hal)
{
// Goto idle state (cur_start=NULL) if transmission done,
// also update sequence and recycle descs.
if (sdio_slave_ll_send_done(hal->slc)) {
//check current state
assert(send_get_state(hal) == STATE_SENDING);
sdio_slave_ll_send_intr_clr(hal->slc);
return true;
} else {
return false;
}
}
//clear counter but keep data
esp_err_t sdio_slave_hal_send_reset_counter(sdio_slave_context_t* hal)
{
SDIO_SLAVE_CHECK(send_get_state(hal) == STATE_IDLE,
"reset counter when transmission started", ESP_ERR_INVALID_STATE);
sdio_slave_ll_send_write_len(hal->slc, 0);
ESP_EARLY_LOGV(TAG, "last_len: %08X", sdio_slave_ll_send_read_len(hal->host));
hal->tail_pkt_len = 0;
sdio_slave_hal_send_desc_t *desc = hal->in_flight_head;
while(desc != NULL) {
hal->tail_pkt_len += desc->dma_desc.length;
desc->pkt_len = hal->tail_pkt_len;
desc = SEND_DESC_NEXT(desc);
}
// in theory the desc should be the one right next to the last of in_flight_head,
// but the link of last is NULL, so get the desc from the ringbuf directly.
desc = (sdio_slave_hal_send_desc_t*)sdio_ringbuf_peek_front(&(hal->send_desc_queue));
while(desc != NULL) {
hal->tail_pkt_len += desc->dma_desc.length;
desc->pkt_len = hal->tail_pkt_len;
desc = SEND_DESC_NEXT(desc);
}
return ESP_OK;
}
static esp_err_t send_get_inflight_desc(sdio_slave_context_t *hal, void **out_arg, uint32_t *out_returned_cnt,
bool init)
{
esp_err_t ret;
if (init) {
assert(hal->returned_desc == NULL);
hal->returned_desc = hal->in_flight_head;
send_set_state(hal, STATE_GETTING_RESULT);
}
if (hal->returned_desc != NULL) {
*out_arg = hal->returned_desc->arg;
hal->returned_desc = SEND_DESC_NEXT(hal->returned_desc);
ret = ESP_OK;
} else {
if (hal->in_flight_head != NULL) {
// fix the link broken of last desc when being sent
assert(hal->in_flight_end != NULL);
SEND_DESC_NEXT_SET(hal->in_flight_end, hal->in_flight_next);
*out_returned_cnt = sdio_ringbuf_return(&(hal->send_desc_queue), (uint8_t*)hal->in_flight_head);
}
hal->in_flight_head = NULL;
hal->in_flight_end = NULL;
ret = ESP_ERR_NOT_FOUND;
}
return ret;
}
static esp_err_t send_get_unsent_desc(sdio_slave_context_t *hal, void **out_arg, uint32_t *out_return_cnt)
{
esp_err_t ret;
sdio_slave_hal_send_desc_t *head, *tail;
ret = sdio_ringbuf_recv(&(hal->send_desc_queue), (uint8_t **) &head, (uint8_t **) &tail, RINGBUF_GET_ONE);
if (ret == ESP_OK) {
//currently each packet takes only one desc.
assert(head == tail);
(*out_arg) = head->arg;
(*out_return_cnt) = sdio_ringbuf_return(&(hal->send_desc_queue), (uint8_t*) head);
} else if (ret == ESP_ERR_NOT_FOUND) {
// if in wait to send state, set the sequence number of tail to the value last sent, just as if the packet wait to
// send never queued.
// Go to idle state (cur_end!=NULL and cur_start=NULL)
send_set_state(hal, STATE_IDLE);
hal->tail_pkt_len = sdio_slave_ll_send_read_len(hal->host);
}
return ret;
}
esp_err_t sdio_slave_hal_send_get_next_finished_arg(sdio_slave_context_t *hal, void **out_arg, uint32_t* out_returned_cnt)
{
bool init = (send_get_state(hal) == STATE_SENDING);
if (init) {
assert(hal->in_flight_head != NULL);
} else {
assert(send_get_state(hal) == STATE_GETTING_RESULT);
}
*out_returned_cnt = 0;
esp_err_t ret = send_get_inflight_desc(hal, out_arg, out_returned_cnt, init);
if (ret == ESP_ERR_NOT_FOUND) {
// Go to wait for packet state
send_set_state(hal, STATE_WAIT_FOR_START);
}
return ret;
}
esp_err_t sdio_slave_hal_send_flush_next_buffer(sdio_slave_context_t *hal, void **out_arg, uint32_t *out_return_cnt)
{
esp_err_t ret = ESP_OK;
*out_return_cnt = 0;
bool init = (send_get_state(hal) == STATE_IDLE);
if (!init) {
if (send_get_state(hal) != STATE_GETTING_RESULT && send_get_state(hal) != STATE_GETTING_UNSENT_DESC) {
return ESP_ERR_INVALID_STATE;
}
}
if (init || send_get_state(hal) == STATE_GETTING_RESULT) {
ret = send_get_inflight_desc(hal, out_arg, out_return_cnt, init);
if (ret == ESP_ERR_NOT_FOUND) {
send_set_state(hal, STATE_GETTING_UNSENT_DESC);
}
}
if (send_get_state(hal) == STATE_GETTING_UNSENT_DESC) {
ret = send_get_unsent_desc(hal, out_arg, out_return_cnt);
if (ret == ESP_ERR_NOT_FOUND) {
send_set_state(hal, STATE_IDLE);
}
}
return ret;
}
esp_err_t sdio_slave_hal_send_new_packet_if_exist(sdio_slave_context_t *hal)
{
esp_err_t ret;
// Go to wait sending state (cur_start!=NULL && cur_end==NULL) if not sending and new packet ready.
// Note we may also enter this state by stopping sending in the app.
if (send_get_state(hal) == STATE_WAIT_FOR_START) {
if (hal->in_flight_head == NULL) {
send_check_new_packet(hal);
}
// Go to sending state (cur_start and cur_end != NULL) if has packet to send.
if (hal->in_flight_head) {
send_new_packet(hal);
ret = ESP_OK;
} else {
ret = ESP_ERR_NOT_FOUND;
}
} else {
ret = ESP_ERR_INVALID_STATE;
}
return ret;
}
static esp_err_t send_write_desc(uint8_t* desc, void* arg)
{
sdio_slave_hal_send_desc_t* next_desc = SEND_DESC_NEXT(desc);
memcpy(desc, arg, sizeof(sdio_slave_hal_send_desc_t));
SEND_DESC_NEXT_SET(desc, next_desc);
return ESP_OK;
}
static void send_isr_invoke(sdio_slave_context_t *hal)
{
sdio_slave_ll_send_part_done_intr_ena(hal->slc, true);
}
esp_err_t sdio_slave_hal_send_queue(sdio_slave_context_t* hal, uint8_t *addr, size_t len, void *arg)
{
hal->tail_pkt_len += len;
sdio_slave_hal_send_desc_t new_desc = {
.dma_desc = {
.size = len,
.length = len,
.buf = addr,
.owner = 1,
// in stream mode, the eof is only appended (in ISR) when new packet is ready to be sent
.eof = (hal->sending_mode == SDIO_SLAVE_SEND_PACKET),
},
.arg = arg,
.pkt_len = hal->tail_pkt_len,
};
esp_err_t ret = sdio_ringbuf_send(&(hal->send_desc_queue), send_write_desc, &new_desc);
send_isr_invoke(hal);
return ret;
}
/*---------------------------------------------------------------------------
* Receive
*--------------------------------------------------------------------------*/
static lldesc_t* recv_get_first_empty_buf(sdio_slave_context_t* hal)
{
sdio_slave_hal_recv_stailq_t *const queue = &(hal->recv_link_list);
lldesc_t *desc = STAILQ_FIRST(queue);
while(desc && desc->owner == 0) {
desc = STAILQ_NEXT(desc, qe);
}
return desc;
}
void sdio_slave_hal_recv_stop(sdio_slave_context_t* hal)
{
sdio_slave_ll_set_ioready(hal->hinf, false); //set IO ready to 0 to stop host from using
sdio_slave_ll_send_stop(hal->slc);
sdio_slave_ll_recv_stop(hal->slc);
sdio_slave_ll_recv_intr_ena(hal->slc, false);
}
//touching linked list, should be protected by spinlock
bool sdio_slave_hal_recv_has_next_item(sdio_slave_context_t* hal)
{
if (hal->recv_cur_ret == NULL || hal->recv_cur_ret->owner != 0) return false;
// This may cause the ``cur_ret`` pointer to be NULL, indicating the list is empty,
// in this case the ``tx_done`` should happen no longer until new desc is appended.
// The app is responsible to place the pointer to the right place again when appending new desc.
hal->recv_cur_ret = STAILQ_NEXT(hal->recv_cur_ret, qe);
return true;
}
bool sdio_slave_hal_recv_done(sdio_slave_context_t *hal)
{
bool ret = sdio_slave_ll_recv_done(hal->slc);
if (ret) {
sdio_slave_ll_recv_done_clear(hal->slc);
}
return ret;
}
lldesc_t *sdio_slave_hal_recv_unload_desc(sdio_slave_context_t *hal)
{
sdio_slave_hal_recv_stailq_t *const queue = &hal->recv_link_list;
lldesc_t *desc = STAILQ_FIRST(queue);
if (desc) {
STAILQ_REMOVE_HEAD(queue, qe);
}
return desc;
}
void sdio_slave_hal_recv_init_desc(sdio_slave_context_t* hal, lldesc_t *desc, uint8_t *start)
{
*desc = (lldesc_t) {
.size = hal->recv_buffer_size,
.buf = start,
};
}
void sdio_slave_hal_recv_start(sdio_slave_context_t *hal)
{
sdio_slave_ll_recv_reset(hal->slc);
lldesc_t *desc = recv_get_first_empty_buf(hal);
if (!desc) {
HAL_LOGD(TAG, "recv: restart without desc");
} else {
//the counter is handled when add/flush/reset
sdio_slave_ll_recv_start(hal->slc, desc);
sdio_slave_ll_recv_intr_ena(hal->slc, true);
}
}
void sdio_slave_hal_recv_reset_counter(sdio_slave_context_t *hal)
{
sdio_slave_ll_recv_size_reset(hal->slc);
lldesc_t *desc = recv_get_first_empty_buf(hal);
while (desc != NULL) {
sdio_slave_ll_recv_size_inc(hal->slc);
desc = STAILQ_NEXT(desc, qe);
}
}
void sdio_slave_hal_recv_flush_one_buffer(sdio_slave_context_t *hal)
{
sdio_slave_hal_recv_stailq_t *const queue = &hal->recv_link_list;
lldesc_t *desc = STAILQ_FIRST(queue);
assert (desc != NULL && desc->owner == 0);
STAILQ_REMOVE_HEAD(queue, qe);
desc->owner = 1;
STAILQ_INSERT_TAIL(queue, desc, qe);
sdio_slave_ll_recv_size_inc(hal->slc);
//we only add it to the tail here, without start the DMA nor increase buffer num.
}
void sdio_slave_hal_load_buf(sdio_slave_context_t *hal, lldesc_t *desc)
{
sdio_slave_hal_recv_stailq_t *const queue = &(hal->recv_link_list);
desc->owner = 1;
lldesc_t *const tail = STAILQ_LAST(queue, lldesc_s, qe);
STAILQ_INSERT_TAIL(queue, desc, qe);
if (hal->recv_cur_ret == NULL) {
hal->recv_cur_ret = desc;
}
if (tail == NULL) {
//no one in the ll, start new ll operation.
sdio_slave_ll_recv_start(hal->slc, desc);
sdio_slave_ll_recv_intr_ena(hal->slc, true);
HAL_LOGV(TAG, "recv_load_buf: start new");
} else {
//restart former ll operation
sdio_slave_ll_recv_restart(hal->slc);
HAL_LOGV(TAG, "recv_load_buf: restart");
}
sdio_slave_ll_recv_size_inc(hal->slc);
}
static inline void show_queue_item(lldesc_t *item)
{
ESP_EARLY_LOGI(TAG, "=> %p: size: %d(%d), eof: %d, owner: %d", item, item->size, item->length, item->eof, item->owner);
ESP_EARLY_LOGI(TAG, " buf: %p, stqe_next: %p", item->buf, item->qe.stqe_next);
}
static void __attribute((unused)) dump_queue(sdio_slave_hal_recv_stailq_t *queue)
{
int cnt = 0;
lldesc_t *item = NULL;
ESP_EARLY_LOGI(TAG, ">>>>> first: %p, last: %p <<<<<", queue->stqh_first, queue->stqh_last);
STAILQ_FOREACH(item, queue, qe) {
cnt++;
show_queue_item(item);
}
ESP_EARLY_LOGI(TAG, "total: %d", cnt);
}
/*---------------------------------------------------------------------------
* Host
*--------------------------------------------------------------------------*/
void sdio_slave_hal_hostint_get_ena(sdio_slave_context_t *hal, sdio_slave_hostint_t *out_int_mask)
{
*out_int_mask = sdio_slave_ll_host_get_intena(hal->host);
}
void sdio_slave_hal_hostint_clear(sdio_slave_context_t *hal, const sdio_slave_hostint_t *mask)
{
sdio_slave_ll_host_intr_clear(hal->host, mask);//clear all interrupts
}
void sdio_slave_hal_hostint_set_ena(sdio_slave_context_t *hal, const sdio_slave_hostint_t *mask)
{
sdio_slave_ll_host_set_intena(hal->host, mask);
}
void sdio_slave_hal_hostint_send(sdio_slave_context_t *hal, const sdio_slave_hostint_t *mask)
{
sdio_slave_ll_host_send_int(hal->slc, mask);
}
uint8_t sdio_slave_hal_host_get_reg(sdio_slave_context_t *hal, int pos)
{
return sdio_slave_ll_host_get_reg(hal->host, pos);
}
void sdio_slave_hal_host_set_reg(sdio_slave_context_t *hal, int pos, uint8_t reg)
{
sdio_slave_ll_host_set_reg(hal->host, pos, reg);
}
void sdio_slave_hal_slvint_fetch_clear(sdio_slave_context_t *hal, sdio_slave_ll_slvint_t *out_int_mask)
{
sdio_slave_ll_slvint_fetch_clear(hal->slc, out_int_mask);
}
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