1 /*
2 * Copyright (C) 2012 Samsung Electronics
3 * R. Chandrasekar <rcsekar@samsung.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8 #include <malloc.h>
9 #include <common.h>
10 #include <asm/io.h>
11 #include <linux/libfdt.h>
12 #include <fdtdec.h>
13 #include <i2c.h>
14 #include <i2s.h>
15 #include <sound.h>
16 #include <asm/arch/sound.h>
17 #include "wm8994.h"
18 #include "max98095.h"
19
20 /* defines */
21 #define SOUND_400_HZ 400
22 #define SOUND_BITS_IN_BYTE 8
23
24 static struct i2stx_info g_i2stx_pri;
25
26 /*
27 * get_sound_i2s_values gets values for i2s parameters
28 *
29 * @param i2stx_info i2s transmitter transfer param structure
30 * @param blob FDT blob if enabled else NULL
31 */
get_sound_i2s_values(struct i2stx_info * i2s,const void * blob)32 static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob)
33 {
34 int node;
35 int error = 0;
36 int base;
37
38 node = fdt_path_offset(blob, "i2s");
39 if (node <= 0) {
40 debug("EXYNOS_SOUND: No node for sound in device tree\n");
41 return -1;
42 }
43
44 /*
45 * Get the pre-defined sound specific values from FDT.
46 * All of these are expected to be correct otherwise
47 * wrong register values in i2s setup parameters
48 * may result in no sound play.
49 */
50 base = fdtdec_get_addr(blob, node, "reg");
51 if (base == FDT_ADDR_T_NONE) {
52 debug("%s: Missing i2s base\n", __func__);
53 return -1;
54 }
55 i2s->base_address = base;
56
57 i2s->audio_pll_clk = fdtdec_get_int(blob,
58 node, "samsung,i2s-epll-clock-frequency", -1);
59 error |= i2s->audio_pll_clk;
60 debug("audio_pll_clk = %d\n", i2s->audio_pll_clk);
61 i2s->samplingrate = fdtdec_get_int(blob,
62 node, "samsung,i2s-sampling-rate", -1);
63 error |= i2s->samplingrate;
64 debug("samplingrate = %d\n", i2s->samplingrate);
65 i2s->bitspersample = fdtdec_get_int(blob,
66 node, "samsung,i2s-bits-per-sample", -1);
67 error |= i2s->bitspersample;
68 debug("bitspersample = %d\n", i2s->bitspersample);
69 i2s->channels = fdtdec_get_int(blob,
70 node, "samsung,i2s-channels", -1);
71 error |= i2s->channels;
72 debug("channels = %d\n", i2s->channels);
73 i2s->rfs = fdtdec_get_int(blob,
74 node, "samsung,i2s-lr-clk-framesize", -1);
75 error |= i2s->rfs;
76 debug("rfs = %d\n", i2s->rfs);
77 i2s->bfs = fdtdec_get_int(blob,
78 node, "samsung,i2s-bit-clk-framesize", -1);
79 error |= i2s->bfs;
80 debug("bfs = %d\n", i2s->bfs);
81
82 i2s->id = fdtdec_get_int(blob, node, "samsung,i2s-id", -1);
83 error |= i2s->id;
84 debug("id = %d\n", i2s->id);
85
86 if (error == -1) {
87 debug("fail to get sound i2s node properties\n");
88 return -1;
89 }
90
91 return 0;
92 }
93
94 /*
95 * Init codec
96 *
97 * @param blob FDT blob
98 * @param pi2s_tx i2s parameters required by codec
99 * @return int value, 0 for success
100 */
codec_init(const void * blob,struct i2stx_info * pi2s_tx)101 static int codec_init(const void *blob, struct i2stx_info *pi2s_tx)
102 {
103 int ret;
104 const char *codectype;
105 int node;
106
107 /* Get the node from FDT for sound */
108 node = fdt_path_offset(blob, "i2s");
109 if (node <= 0) {
110 debug("EXYNOS_SOUND: No node for sound in device tree\n");
111 debug("node = %d\n", node);
112 return -1;
113 }
114
115 /*
116 * Get the pre-defined sound codec specific values from FDT.
117 * All of these are expected to be correct otherwise sound
118 * can not be played
119 */
120 codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL);
121 debug("device = %s\n", codectype);
122 if (!strcmp(codectype, "wm8994")) {
123 /* Check the codec type and initialise the same */
124 ret = wm8994_init(blob, pi2s_tx->id + 1,
125 pi2s_tx->samplingrate,
126 (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
127 pi2s_tx->bitspersample, pi2s_tx->channels);
128 } else if (!strcmp(codectype, "max98095")) {
129 ret = max98095_init(blob, pi2s_tx->id + 1,
130 pi2s_tx->samplingrate,
131 (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
132 pi2s_tx->bitspersample);
133 } else {
134 debug("%s: Unknown codec type %s\n", __func__, codectype);
135 return -1;
136 }
137
138 if (ret) {
139 debug("%s: Codec init failed\n", __func__);
140 return -1;
141 }
142
143 return 0;
144 }
145
sound_init(const void * blob)146 int sound_init(const void *blob)
147 {
148 int ret;
149 struct i2stx_info *pi2s_tx = &g_i2stx_pri;
150
151 /* Get the I2S Values */
152 if (get_sound_i2s_values(pi2s_tx, blob) < 0) {
153 debug(" FDT I2S values failed\n");
154 return -1;
155 }
156
157 if (codec_init(blob, pi2s_tx) < 0) {
158 debug(" Codec init failed\n");
159 return -1;
160 }
161
162 ret = i2s_tx_init(pi2s_tx);
163 if (ret) {
164 debug("%s: Failed to init i2c transmit: ret=%d\n", __func__,
165 ret);
166 return ret;
167 }
168
169
170 return ret;
171 }
172
sound_play(uint32_t msec,uint32_t frequency)173 int sound_play(uint32_t msec, uint32_t frequency)
174 {
175 unsigned int *data;
176 unsigned long data_size;
177 unsigned int ret = 0;
178
179 /*Buffer length computation */
180 data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels;
181 data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE);
182 data = malloc(data_size);
183
184 if (data == NULL) {
185 debug("%s: malloc failed\n", __func__);
186 return -1;
187 }
188
189 sound_create_square_wave((unsigned short *)data,
190 data_size / sizeof(unsigned short),
191 frequency);
192
193 while (msec >= 1000) {
194 ret = i2s_transfer_tx_data(&g_i2stx_pri, data,
195 (data_size / sizeof(int)));
196 msec -= 1000;
197 }
198 if (msec) {
199 unsigned long size =
200 (data_size * msec) / (sizeof(int) * 1000);
201
202 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size);
203 }
204
205 free(data);
206
207 return ret;
208 }
209