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Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +00001/*
2 * Copyright (C) 2012 Samsung Electronics
3 * R. Chandrasekar <rcsekar@samsung.com>
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +00006 */
7
8#include <malloc.h>
9#include <common.h>
10#include <asm/io.h>
Rajeshwari Shindef4823102012-12-26 20:03:17 +000011#include <libfdt.h>
12#include <fdtdec.h>
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000013#include <i2c.h>
14#include <i2s.h>
15#include <sound.h>
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000016#include <asm/arch/sound.h>
Rajeshwari Shindef4823102012-12-26 20:03:17 +000017#include "wm8994.h"
Rajeshwari Shinde14d2dfc2013-02-14 19:46:13 +000018#include "max98095.h"
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000019
20/* defines */
21#define SOUND_400_HZ 400
22#define SOUND_BITS_IN_BYTE 8
23
24static struct i2stx_info g_i2stx_pri;
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000025
26/*
Rajeshwari Shindef4823102012-12-26 20:03:17 +000027 * get_sound_i2s_values gets values for i2s parameters
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000028 *
29 * @param i2stx_info i2s transmitter transfer param structure
Rajeshwari Shindef4823102012-12-26 20:03:17 +000030 * @param blob FDT blob if enabled else NULL
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000031 */
Rajeshwari Shindef4823102012-12-26 20:03:17 +000032static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob)
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000033{
Rajeshwari Shindef4823102012-12-26 20:03:17 +000034#ifdef CONFIG_OF_CONTROL
35 int node;
36 int error = 0;
37 int base;
38
39 node = fdtdec_next_compatible(blob, 0,
40 COMPAT_SAMSUNG_EXYNOS5_SOUND);
41 if (node <= 0) {
42 debug("EXYNOS_SOUND: No node for sound in device tree\n");
43 return -1;
44 }
45
46 /*
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.
51 */
52 base = fdtdec_get_addr(blob, node, "reg");
53 if (base == FDT_ADDR_T_NONE) {
54 debug("%s: Missing i2s base\n", __func__);
55 return -1;
56 }
57 i2s->base_address = base;
58
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);
77 error |= i2s->rfs;
78 debug("rfs = %d\n", i2s->rfs);
79 i2s->bfs = fdtdec_get_int(blob,
80 node, "samsung,i2s-bit-clk-framesize", -1);
81 error |= i2s->bfs;
82 debug("bfs = %d\n", i2s->bfs);
83 if (error == -1) {
84 debug("fail to get sound i2s node properties\n");
85 return -1;
86 }
87#else
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000088 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;
93 i2s->rfs = I2S_RFS;
94 i2s->bfs = I2S_BFS;
Rajeshwari Shindef4823102012-12-26 20:03:17 +000095#endif
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +000096 return 0;
97}
98
99/*
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000100 * Init codec
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000101 *
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000102 * @param blob FDT blob
103 * @param pi2s_tx i2s parameters required by codec
104 * @return int value, 0 for success
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000105 */
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000106static int codec_init(const void *blob, struct i2stx_info *pi2s_tx)
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000107{
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000108 int ret;
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000109 const char *codectype;
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000110#ifdef CONFIG_OF_CONTROL
111 int node;
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000112
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000113 /* Get the node from FDT for sound */
114 node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS5_SOUND);
115 if (node <= 0) {
116 debug("EXYNOS_SOUND: No node for sound in device tree\n");
117 debug("node = %d\n", node);
118 return -1;
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000119 }
120
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000121 /*
122 * Get the pre-defined sound codec specific values from FDT.
123 * All of these are expected to be correct otherwise sound
124 * can not be played
125 */
126 codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL);
127 debug("device = %s\n", codectype);
128#else
129 codectype = AUDIO_CODEC;
130#endif
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);
Rajeshwari Shinde14d2dfc2013-02-14 19:46:13 +0000137 } else if (!strcmp(codectype, "max98095")) {
138 ret = max98095_init(blob, pi2s_tx->samplingrate,
139 (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
140 pi2s_tx->bitspersample);
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000141 } else {
Rajeshwari Shinde14d2dfc2013-02-14 19:46:13 +0000142 debug("%s: Unknown codec type %s\n", __func__, codectype);
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000143 return -1;
144 }
Rajeshwari Shinde14d2dfc2013-02-14 19:46:13 +0000145
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000146 if (ret) {
147 debug("%s: Codec init failed\n", __func__);
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000148 return -1;
149 }
150
151 return 0;
152}
153
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000154int sound_init(const void *blob)
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000155{
156 int ret;
157 struct i2stx_info *pi2s_tx = &g_i2stx_pri;
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000158
159 /* Get the I2S Values */
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000160 if (get_sound_i2s_values(pi2s_tx, blob) < 0) {
161 debug(" FDT I2S values failed\n");
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000162 return -1;
Rajeshwari Shindef4823102012-12-26 20:03:17 +0000163 }
164
165 if (codec_init(blob, pi2s_tx) < 0) {
166 debug(" Codec init failed\n");
167 return -1;
168 }
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000169
170 ret = i2s_tx_init(pi2s_tx);
171 if (ret) {
172 debug("%s: Failed to init i2c transmit: ret=%d\n", __func__,
173 ret);
174 return ret;
175 }
176
Rajeshwari Shinde511ed5f2012-10-25 19:49:22 +0000177
178 return ret;
179}
180
181/*
182 * Generates square wave sound data for 1 second
183 *
184 * @param data data buffer pointer
185 * @param size size of the buffer
186 * @param freq frequency of the wave
187 */
188static void sound_prepare_buffer(unsigned short *data, int size, uint32_t freq)
189{
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;
194
195 assert(freq);
196
197 /* Make sure we don't overflow our buffer */
198 if (size % 2)
199 size--;
200
201 while (size) {
202 int i;
203 for (i = 0; size && i < half; i++) {
204 size -= 2;
205 *data++ = amplitude;
206 *data++ = amplitude;
207 }
208 for (i = 0; size && i < period - half; i++) {
209 size -= 2;
210 *data++ = -amplitude;
211 *data++ = -amplitude;
212 }
213 }
214}
215
216int sound_play(uint32_t msec, uint32_t frequency)
217{
218 unsigned int *data;
219 unsigned long data_size;
220 unsigned int ret = 0;
221
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);
226
227 if (data == NULL) {
228 debug("%s: malloc failed\n", __func__);
229 return -1;
230 }
231
232 sound_prepare_buffer((unsigned short *)data,
233 data_size / sizeof(unsigned short), frequency);
234
235 while (msec >= 1000) {
236 ret = i2s_transfer_tx_data(&g_i2stx_pri, data,
237 (data_size / sizeof(int)));
238 msec -= 1000;
239 }
240 if (msec) {
241 unsigned long size =
242 (data_size * msec) / (sizeof(int) * 1000);
243
244 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size);
245 }
246
247 free(data);
248
249 return ret;
250}