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 = 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 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; 93 i2s->rfs = I2S_RFS; 94 i2s->bfs = I2S_BFS; 95 #endif 96 return 0; 97 } 98 99 /* 100 * Init codec 101 * 102 * @param blob FDT blob 103 * @param pi2s_tx i2s parameters required by codec 104 * @return int value, 0 for success 105 */ 106 static int codec_init(const void *blob, struct i2stx_info *pi2s_tx) 107 { 108 int ret; 109 const char *codectype; 110 #ifdef CONFIG_OF_CONTROL 111 int node; 112 113 /* 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; 119 } 120 121 /* 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); 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); 141 } else { 142 debug("%s: Unknown codec type %s\n", __func__, codectype); 143 return -1; 144 } 145 146 if (ret) { 147 debug("%s: Codec init failed\n", __func__); 148 return -1; 149 } 150 151 return 0; 152 } 153 154 int sound_init(const void *blob) 155 { 156 int ret; 157 struct i2stx_info *pi2s_tx = &g_i2stx_pri; 158 159 /* Get the I2S Values */ 160 if (get_sound_i2s_values(pi2s_tx, blob) < 0) { 161 debug(" FDT I2S values failed\n"); 162 return -1; 163 } 164 165 if (codec_init(blob, pi2s_tx) < 0) { 166 debug(" Codec init failed\n"); 167 return -1; 168 } 169 170 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 } 176 177 178 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 */ 188 static 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 } 215 216 int 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 } 251