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 <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 */ 32 static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob) 33 { 34 #ifdef CONFIG_OF_CONTROL 35 int node; 36 int error = 0; 37 int base; 38 39 node = fdt_path_offset(blob, "i2s"); 40 if (node <= 0) { 41 debug("EXYNOS_SOUND: No node for sound in device tree\n"); 42 return -1; 43 } 44 45 /* 46 * Get the pre-defined sound specific values from FDT. 47 * All of these are expected to be correct otherwise 48 * wrong register values in i2s setup parameters 49 * may result in no sound play. 50 */ 51 base = fdtdec_get_addr(blob, node, "reg"); 52 if (base == FDT_ADDR_T_NONE) { 53 debug("%s: Missing i2s base\n", __func__); 54 return -1; 55 } 56 i2s->base_address = base; 57 58 i2s->audio_pll_clk = fdtdec_get_int(blob, 59 node, "samsung,i2s-epll-clock-frequency", -1); 60 error |= i2s->audio_pll_clk; 61 debug("audio_pll_clk = %d\n", i2s->audio_pll_clk); 62 i2s->samplingrate = fdtdec_get_int(blob, 63 node, "samsung,i2s-sampling-rate", -1); 64 error |= i2s->samplingrate; 65 debug("samplingrate = %d\n", i2s->samplingrate); 66 i2s->bitspersample = fdtdec_get_int(blob, 67 node, "samsung,i2s-bits-per-sample", -1); 68 error |= i2s->bitspersample; 69 debug("bitspersample = %d\n", i2s->bitspersample); 70 i2s->channels = fdtdec_get_int(blob, 71 node, "samsung,i2s-channels", -1); 72 error |= i2s->channels; 73 debug("channels = %d\n", i2s->channels); 74 i2s->rfs = fdtdec_get_int(blob, 75 node, "samsung,i2s-lr-clk-framesize", -1); 76 error |= i2s->rfs; 77 debug("rfs = %d\n", i2s->rfs); 78 i2s->bfs = fdtdec_get_int(blob, 79 node, "samsung,i2s-bit-clk-framesize", -1); 80 error |= i2s->bfs; 81 debug("bfs = %d\n", i2s->bfs); 82 83 i2s->id = fdtdec_get_int(blob, node, "samsung,i2s-id", -1); 84 error |= i2s->id; 85 debug("id = %d\n", i2s->id); 86 87 if (error == -1) { 88 debug("fail to get sound i2s node properties\n"); 89 return -1; 90 } 91 #else 92 i2s->base_address = samsung_get_base_i2s(); 93 i2s->audio_pll_clk = I2S_PLL_CLK; 94 i2s->samplingrate = I2S_SAMPLING_RATE; 95 i2s->bitspersample = I2S_BITS_PER_SAMPLE; 96 i2s->channels = I2S_CHANNELS; 97 i2s->rfs = I2S_RFS; 98 i2s->bfs = I2S_BFS; 99 i2s->id = 0; 100 #endif 101 return 0; 102 } 103 104 /* 105 * Init codec 106 * 107 * @param blob FDT blob 108 * @param pi2s_tx i2s parameters required by codec 109 * @return int value, 0 for success 110 */ 111 static int codec_init(const void *blob, struct i2stx_info *pi2s_tx) 112 { 113 int ret; 114 const char *codectype; 115 #ifdef CONFIG_OF_CONTROL 116 int node; 117 118 /* Get the node from FDT for sound */ 119 node = fdt_path_offset(blob, "i2s"); 120 if (node <= 0) { 121 debug("EXYNOS_SOUND: No node for sound in device tree\n"); 122 debug("node = %d\n", node); 123 return -1; 124 } 125 126 /* 127 * Get the pre-defined sound codec specific values from FDT. 128 * All of these are expected to be correct otherwise sound 129 * can not be played 130 */ 131 codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL); 132 debug("device = %s\n", codectype); 133 #else 134 codectype = AUDIO_CODEC; 135 #endif 136 if (!strcmp(codectype, "wm8994")) { 137 /* Check the codec type and initialise the same */ 138 ret = wm8994_init(blob, pi2s_tx->id + 1, 139 pi2s_tx->samplingrate, 140 (pi2s_tx->samplingrate * (pi2s_tx->rfs)), 141 pi2s_tx->bitspersample, pi2s_tx->channels); 142 } else if (!strcmp(codectype, "max98095")) { 143 ret = max98095_init(blob, pi2s_tx->id + 1, 144 pi2s_tx->samplingrate, 145 (pi2s_tx->samplingrate * (pi2s_tx->rfs)), 146 pi2s_tx->bitspersample); 147 } else { 148 debug("%s: Unknown codec type %s\n", __func__, codectype); 149 return -1; 150 } 151 152 if (ret) { 153 debug("%s: Codec init failed\n", __func__); 154 return -1; 155 } 156 157 return 0; 158 } 159 160 int sound_init(const void *blob) 161 { 162 int ret; 163 struct i2stx_info *pi2s_tx = &g_i2stx_pri; 164 165 /* Get the I2S Values */ 166 if (get_sound_i2s_values(pi2s_tx, blob) < 0) { 167 debug(" FDT I2S values failed\n"); 168 return -1; 169 } 170 171 if (codec_init(blob, pi2s_tx) < 0) { 172 debug(" Codec init failed\n"); 173 return -1; 174 } 175 176 ret = i2s_tx_init(pi2s_tx); 177 if (ret) { 178 debug("%s: Failed to init i2c transmit: ret=%d\n", __func__, 179 ret); 180 return ret; 181 } 182 183 184 return ret; 185 } 186 187 /* 188 * Generates square wave sound data for 1 second 189 * 190 * @param data data buffer pointer 191 * @param size size of the buffer 192 * @param freq frequency of the wave 193 */ 194 static void sound_prepare_buffer(unsigned short *data, int size, uint32_t freq) 195 { 196 const int sample = 48000; 197 const unsigned short amplitude = 16000; /* between 1 and 32767 */ 198 const int period = freq ? sample / freq : 0; 199 const int half = period / 2; 200 201 assert(freq); 202 203 /* Make sure we don't overflow our buffer */ 204 if (size % 2) 205 size--; 206 207 while (size) { 208 int i; 209 for (i = 0; size && i < half; i++) { 210 size -= 2; 211 *data++ = amplitude; 212 *data++ = amplitude; 213 } 214 for (i = 0; size && i < period - half; i++) { 215 size -= 2; 216 *data++ = -amplitude; 217 *data++ = -amplitude; 218 } 219 } 220 } 221 222 int sound_play(uint32_t msec, uint32_t frequency) 223 { 224 unsigned int *data; 225 unsigned long data_size; 226 unsigned int ret = 0; 227 228 /*Buffer length computation */ 229 data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels; 230 data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE); 231 data = malloc(data_size); 232 233 if (data == NULL) { 234 debug("%s: malloc failed\n", __func__); 235 return -1; 236 } 237 238 sound_prepare_buffer((unsigned short *)data, 239 data_size / sizeof(unsigned short), frequency); 240 241 while (msec >= 1000) { 242 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, 243 (data_size / sizeof(int))); 244 msec -= 1000; 245 } 246 if (msec) { 247 unsigned long size = 248 (data_size * msec) / (sizeof(int) * 1000); 249 250 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size); 251 } 252 253 free(data); 254 255 return ret; 256 } 257