1 // Copyright 2020 Espressif Systems (Shanghai) PTE LTD
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "freertos/FreeRTOS.h"
16 #include "soc/periph_defs.h"
17 #include "soc/soc_memory_layout.h"
18 #include "soc/soc_caps.h"
19 #include "hal/gdma_ll.h"
20 #include "hal/gdma_hal.h"
21 #include "driver/periph_ctrl.h"
22 #include "esp_log.h"
23 #include "esp_attr.h"
24 #include "esp_err.h"
25 #include "esp_async_memcpy_impl.h"
26
async_memcpy_impl_rx_eof_callback(gdma_channel_handle_t dma_chan,gdma_event_data_t * event_data,void * user_data)27 IRAM_ATTR static bool async_memcpy_impl_rx_eof_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
28 {
29 async_memcpy_impl_t *mcp_impl = (async_memcpy_impl_t *)user_data;
30 mcp_impl->rx_eof_addr = event_data->rx_eof_desc_addr;
31
32 async_memcpy_isr_on_rx_done_event(mcp_impl);
33 return mcp_impl->isr_need_yield;
34 }
35
async_memcpy_impl_init(async_memcpy_impl_t * impl)36 esp_err_t async_memcpy_impl_init(async_memcpy_impl_t *impl)
37 {
38 esp_err_t ret = ESP_OK;
39 // create TX channel and reserve sibling channel for future use
40 gdma_channel_alloc_config_t tx_alloc_config = {
41 .flags.reserve_sibling = 1,
42 .direction = GDMA_CHANNEL_DIRECTION_TX,
43 };
44 ret = gdma_new_channel(&tx_alloc_config, &impl->tx_channel);
45 if (ret != ESP_OK) {
46 goto err;
47 }
48
49 // create RX channel and specify it should be reside in the same pair as TX
50 gdma_channel_alloc_config_t rx_alloc_config = {
51 .direction = GDMA_CHANNEL_DIRECTION_RX,
52 .sibling_chan = impl->tx_channel,
53 };
54 ret = gdma_new_channel(&rx_alloc_config, &impl->rx_channel);
55 if (ret != ESP_OK) {
56 goto err;
57 }
58
59 gdma_connect(impl->rx_channel, GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_M2M, 0));
60 gdma_connect(impl->tx_channel, GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_M2M, 0));
61
62 gdma_strategy_config_t strategy_config = {
63 .auto_update_desc = true,
64 .owner_check = true
65 };
66
67 gdma_apply_strategy(impl->tx_channel, &strategy_config);
68 gdma_apply_strategy(impl->rx_channel, &strategy_config);
69
70 gdma_rx_event_callbacks_t cbs = {
71 .on_recv_eof = async_memcpy_impl_rx_eof_callback
72 };
73 ret = gdma_register_rx_event_callbacks(impl->rx_channel, &cbs, impl);
74
75 err:
76 return ret;
77 }
78
async_memcpy_impl_deinit(async_memcpy_impl_t * impl)79 esp_err_t async_memcpy_impl_deinit(async_memcpy_impl_t *impl)
80 {
81 gdma_disconnect(impl->rx_channel);
82 gdma_disconnect(impl->tx_channel);
83 gdma_del_channel(impl->rx_channel);
84 gdma_del_channel(impl->tx_channel);
85 return ESP_OK;
86 }
87
async_memcpy_impl_start(async_memcpy_impl_t * impl,intptr_t outlink_base,intptr_t inlink_base)88 esp_err_t async_memcpy_impl_start(async_memcpy_impl_t *impl, intptr_t outlink_base, intptr_t inlink_base)
89 {
90 gdma_start(impl->rx_channel, inlink_base);
91 gdma_start(impl->tx_channel, outlink_base);
92 return ESP_OK;
93 }
94
async_memcpy_impl_stop(async_memcpy_impl_t * impl)95 esp_err_t async_memcpy_impl_stop(async_memcpy_impl_t *impl)
96 {
97 gdma_stop(impl->rx_channel);
98 gdma_stop(impl->tx_channel);
99 return ESP_OK;
100 }
101
async_memcpy_impl_restart(async_memcpy_impl_t * impl)102 esp_err_t async_memcpy_impl_restart(async_memcpy_impl_t *impl)
103 {
104 gdma_append(impl->rx_channel);
105 gdma_append(impl->tx_channel);
106 return ESP_OK;
107 }
108
async_memcpy_impl_is_buffer_address_valid(async_memcpy_impl_t * impl,void * src,void * dst)109 bool async_memcpy_impl_is_buffer_address_valid(async_memcpy_impl_t *impl, void *src, void *dst)
110 {
111 return true;
112 }
113
