1 /**
2 * @file i2s.c
3 * @brief Inter-Integrated Sound (I2S) driver implementation.
4 */
5
6 /******************************************************************************
7 *
8 * Copyright (C) 2022-2023 Maxim Integrated Products, Inc. (now owned by
9 * Analog Devices, Inc.),
10 * Copyright (C) 2023-2024 Analog Devices, Inc.
11 *
12 * Licensed under the Apache License, Version 2.0 (the "License");
13 * you may not use this file except in compliance with the License.
14 * You may obtain a copy of the License at
15 *
16 * http://www.apache.org/licenses/LICENSE-2.0
17 *
18 * Unless required by applicable law or agreed to in writing, software
19 * distributed under the License is distributed on an "AS IS" BASIS,
20 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
21 * See the License for the specific language governing permissions and
22 * limitations under the License.
23 *
24 ******************************************************************************/
25
26 #include <stddef.h>
27 #include <stdint.h>
28 #include "mxc_device.h"
29 #include "mxc_assert.h"
30 #include "mxc_lock.h"
31 #include "mxc_sys.h"
32 #include "mxc_pins.h"
33 #include "dma.h"
34 #include "i2s.h"
35 #include "i2s_reva.h"
36 #include "spimss.h"
37 #include "spimss_regs.h"
38
39 #define I2S_CHANNELS 2
40 #define I2S_WIDTH 16
41
42 int dma_channel = -1;
43
MXC_I2S_Init(const mxc_i2s_config_t * config,void (* dma_ctz_cb)(int,int))44 int MXC_I2S_Init(const mxc_i2s_config_t *config, void (*dma_ctz_cb)(int, int))
45 {
46 #ifndef MSDK_NO_GPIO_CLK_INIT
47 if (config->map == I2S_MAP_A) {
48 MXC_GPIO_Config(&gpio_cfg_spi1a); // SPIMSS: I2S and SPI share pins
49 } else if (config->map == I2S_MAP_B) {
50 MXC_GPIO_Config(&gpio_cfg_spi1b);
51 } else {
52 return E_BAD_PARAM;
53 }
54
55 MXC_SYS_ClockEnable(MXC_SYS_PERIPH_CLOCK_SPI1); // SPI1 clock used for SPIMSS
56 #endif
57
58 return MXC_I2S_RevA_Init((mxc_spimss_reva_regs_t *)MXC_SPIMSS, config, dma_ctz_cb);
59 }
60
MXC_I2S_Shutdown(void)61 int MXC_I2S_Shutdown(void)
62 {
63 MXC_SYS_ClockDisable(MXC_SYS_PERIPH_CLOCK_SPI1); // SPI1 used for SPIMSS
64 return MXC_I2S_RevA_Shutdown((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
65 }
66
MXC_I2S_Mute(void)67 int MXC_I2S_Mute(void)
68 {
69 return MXC_I2S_RevA_Mute((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
70 }
71
MXC_I2S_Unmute(void)72 int MXC_I2S_Unmute(void)
73 {
74 return MXC_I2S_RevA_Unmute((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
75 }
76
MXC_I2S_Pause(void)77 int MXC_I2S_Pause(void)
78 {
79 return MXC_I2S_RevA_Pause((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
80 }
81
MXC_I2S_Unpause(void)82 int MXC_I2S_Unpause(void)
83 {
84 return MXC_I2S_RevA_Unpause((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
85 }
86
MXC_I2S_Stop(void)87 int MXC_I2S_Stop(void)
88 {
89 return MXC_I2S_RevA_Stop((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
90 }
91
MXC_I2S_Start(void)92 int MXC_I2S_Start(void)
93 {
94 return MXC_I2S_RevA_Start((mxc_spimss_reva_regs_t *)MXC_SPIMSS);
95 }
96
MXC_I2S_DMA_ClearFlags(void)97 int MXC_I2S_DMA_ClearFlags(void)
98 {
99 return MXC_I2S_RevA_DMA_ClearFlags();
100 }
101
MXC_I2S_DMA_SetAddrCnt(void * src_addr,void * dst_addr,unsigned int count)102 int MXC_I2S_DMA_SetAddrCnt(void *src_addr, void *dst_addr, unsigned int count)
103 {
104 return MXC_I2S_RevA_DMA_SetAddrCnt(src_addr, dst_addr, count);
105 }
106
MXC_I2S_DMA_SetReload(void * src_addr,void * dst_addr,unsigned int count)107 int MXC_I2S_DMA_SetReload(void *src_addr, void *dst_addr, unsigned int count)
108 {
109 return MXC_I2S_RevA_DMA_SetReload(src_addr, dst_addr, count);
110 }
111
