2 * Copyright (C) 2012 Samsung Electronics
3 * R. Chandrasekar <rcsekar@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
16 #include <asm/arch/sound.h>
21 #define SOUND_400_HZ 400
22 #define SOUND_BITS_IN_BYTE 8
24 static struct i2stx_info g_i2stx_pri
;
27 * get_sound_i2s_values gets values for i2s parameters
29 * @param i2stx_info i2s transmitter transfer param structure
30 * @param blob FDT blob if enabled else NULL
32 static int get_sound_i2s_values(struct i2stx_info
*i2s
, const void *blob
)
34 #ifdef CONFIG_OF_CONTROL
39 node
= fdtdec_next_compatible(blob
, 0,
40 COMPAT_SAMSUNG_EXYNOS5_SOUND
);
42 debug("EXYNOS_SOUND: No node for sound in device tree\n");
47 * Get the pre-defined sound specific values from FDT.
48 * All of these are expected to be correct otherwise
49 * wrong register values in i2s setup parameters
50 * may result in no sound play.
52 base
= fdtdec_get_addr(blob
, node
, "reg");
53 if (base
== FDT_ADDR_T_NONE
) {
54 debug("%s: Missing i2s base\n", __func__
);
57 i2s
->base_address
= base
;
59 i2s
->audio_pll_clk
= fdtdec_get_int(blob
,
60 node
, "samsung,i2s-epll-clock-frequency", -1);
61 error
|= i2s
->audio_pll_clk
;
62 debug("audio_pll_clk = %d\n", i2s
->audio_pll_clk
);
63 i2s
->samplingrate
= fdtdec_get_int(blob
,
64 node
, "samsung,i2s-sampling-rate", -1);
65 error
|= i2s
->samplingrate
;
66 debug("samplingrate = %d\n", i2s
->samplingrate
);
67 i2s
->bitspersample
= fdtdec_get_int(blob
,
68 node
, "samsung,i2s-bits-per-sample", -1);
69 error
|= i2s
->bitspersample
;
70 debug("bitspersample = %d\n", i2s
->bitspersample
);
71 i2s
->channels
= fdtdec_get_int(blob
,
72 node
, "samsung,i2s-channels", -1);
73 error
|= i2s
->channels
;
74 debug("channels = %d\n", i2s
->channels
);
75 i2s
->rfs
= fdtdec_get_int(blob
,
76 node
, "samsung,i2s-lr-clk-framesize", -1);
78 debug("rfs = %d\n", i2s
->rfs
);
79 i2s
->bfs
= fdtdec_get_int(blob
,
80 node
, "samsung,i2s-bit-clk-framesize", -1);
82 debug("bfs = %d\n", i2s
->bfs
);
84 debug("fail to get sound i2s node properties\n");
88 i2s
->base_address
= samsung_get_base_i2s();
89 i2s
->audio_pll_clk
= I2S_PLL_CLK
;
90 i2s
->samplingrate
= I2S_SAMPLING_RATE
;
91 i2s
->bitspersample
= I2S_BITS_PER_SAMPLE
;
92 i2s
->channels
= I2S_CHANNELS
;
102 * @param blob FDT blob
103 * @param pi2s_tx i2s parameters required by codec
104 * @return int value, 0 for success
106 static int codec_init(const void *blob
, struct i2stx_info
*pi2s_tx
)
109 const char *codectype
;
110 #ifdef CONFIG_OF_CONTROL
113 /* Get the node from FDT for sound */
114 node
= fdtdec_next_compatible(blob
, 0, COMPAT_SAMSUNG_EXYNOS5_SOUND
);
116 debug("EXYNOS_SOUND: No node for sound in device tree\n");
117 debug("node = %d\n", node
);
122 * Get the pre-defined sound codec specific values from FDT.
123 * All of these are expected to be correct otherwise sound
126 codectype
= fdt_getprop(blob
, node
, "samsung,codec-type", NULL
);
127 debug("device = %s\n", codectype
);
129 codectype
= AUDIO_CODEC
;
131 if (!strcmp(codectype
, "wm8994")) {
132 /* Check the codec type and initialise the same */
133 ret
= wm8994_init(blob
, WM8994_AIF2
,
134 pi2s_tx
->samplingrate
,
135 (pi2s_tx
->samplingrate
* (pi2s_tx
->rfs
)),
136 pi2s_tx
->bitspersample
, pi2s_tx
->channels
);
137 } else if (!strcmp(codectype
, "max98095")) {
138 ret
= max98095_init(blob
, pi2s_tx
->samplingrate
,
139 (pi2s_tx
->samplingrate
* (pi2s_tx
->rfs
)),
140 pi2s_tx
->bitspersample
);
142 debug("%s: Unknown codec type %s\n", __func__
, codectype
);
147 debug("%s: Codec init failed\n", __func__
);
154 int sound_init(const void *blob
)
157 struct i2stx_info
*pi2s_tx
= &g_i2stx_pri
;
159 /* Get the I2S Values */
160 if (get_sound_i2s_values(pi2s_tx
, blob
) < 0) {
161 debug(" FDT I2S values failed\n");
165 if (codec_init(blob
, pi2s_tx
) < 0) {
166 debug(" Codec init failed\n");
170 ret
= i2s_tx_init(pi2s_tx
);
172 debug("%s: Failed to init i2c transmit: ret=%d\n", __func__
,
182 * Generates square wave sound data for 1 second
184 * @param data data buffer pointer
185 * @param size size of the buffer
186 * @param freq frequency of the wave
188 static void sound_prepare_buffer(unsigned short *data
, int size
, uint32_t freq
)
190 const int sample
= 48000;
191 const unsigned short amplitude
= 16000; /* between 1 and 32767 */
192 const int period
= freq
? sample
/ freq
: 0;
193 const int half
= period
/ 2;
197 /* Make sure we don't overflow our buffer */
203 for (i
= 0; size
&& i
< half
; i
++) {
208 for (i
= 0; size
&& i
< period
- half
; i
++) {
210 *data
++ = -amplitude
;
211 *data
++ = -amplitude
;
216 int sound_play(uint32_t msec
, uint32_t frequency
)
219 unsigned long data_size
;
220 unsigned int ret
= 0;
222 /*Buffer length computation */
223 data_size
= g_i2stx_pri
.samplingrate
* g_i2stx_pri
.channels
;
224 data_size
*= (g_i2stx_pri
.bitspersample
/ SOUND_BITS_IN_BYTE
);
225 data
= malloc(data_size
);
228 debug("%s: malloc failed\n", __func__
);
232 sound_prepare_buffer((unsigned short *)data
,
233 data_size
/ sizeof(unsigned short), frequency
);
235 while (msec
>= 1000) {
236 ret
= i2s_transfer_tx_data(&g_i2stx_pri
, data
,
237 (data_size
/ sizeof(int)));
242 (data_size
* msec
) / (sizeof(int) * 1000);
244 ret
= i2s_transfer_tx_data(&g_i2stx_pri
, data
, size
);