1 /* 2 * Copyright (C) 2012 Samsung Electronics 3 * R. Chandrasekar <rcsekar@samsung.com> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <malloc.h> 25 #include <common.h> 26 #include <asm/io.h> 27 #include <libfdt.h> 28 #include <fdtdec.h> 29 #include <i2c.h> 30 #include <i2s.h> 31 #include <sound.h> 32 #include <asm/arch/sound.h> 33 #include "wm8994.h" 34 #include "max98095.h" 35 36 /* defines */ 37 #define SOUND_400_HZ 400 38 #define SOUND_BITS_IN_BYTE 8 39 40 static struct i2stx_info g_i2stx_pri; 41 42 /* 43 * get_sound_i2s_values gets values for i2s parameters 44 * 45 * @param i2stx_info i2s transmitter transfer param structure 46 * @param blob FDT blob if enabled else NULL 47 */ 48 static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob) 49 { 50 #ifdef CONFIG_OF_CONTROL 51 int node; 52 int error = 0; 53 int base; 54 55 node = fdtdec_next_compatible(blob, 0, 56 COMPAT_SAMSUNG_EXYNOS5_SOUND); 57 if (node <= 0) { 58 debug("EXYNOS_SOUND: No node for sound in device tree\n"); 59 return -1; 60 } 61 62 /* 63 * Get the pre-defined sound specific values from FDT. 64 * All of these are expected to be correct otherwise 65 * wrong register values in i2s setup parameters 66 * may result in no sound play. 67 */ 68 base = fdtdec_get_addr(blob, node, "reg"); 69 if (base == FDT_ADDR_T_NONE) { 70 debug("%s: Missing i2s base\n", __func__); 71 return -1; 72 } 73 i2s->base_address = base; 74 75 i2s->audio_pll_clk = fdtdec_get_int(blob, 76 node, "samsung,i2s-epll-clock-frequency", -1); 77 error |= i2s->audio_pll_clk; 78 debug("audio_pll_clk = %d\n", i2s->audio_pll_clk); 79 i2s->samplingrate = fdtdec_get_int(blob, 80 node, "samsung,i2s-sampling-rate", -1); 81 error |= i2s->samplingrate; 82 debug("samplingrate = %d\n", i2s->samplingrate); 83 i2s->bitspersample = fdtdec_get_int(blob, 84 node, "samsung,i2s-bits-per-sample", -1); 85 error |= i2s->bitspersample; 86 debug("bitspersample = %d\n", i2s->bitspersample); 87 i2s->channels = fdtdec_get_int(blob, 88 node, "samsung,i2s-channels", -1); 89 error |= i2s->channels; 90 debug("channels = %d\n", i2s->channels); 91 i2s->rfs = fdtdec_get_int(blob, 92 node, "samsung,i2s-lr-clk-framesize", -1); 93 error |= i2s->rfs; 94 debug("rfs = %d\n", i2s->rfs); 95 i2s->bfs = fdtdec_get_int(blob, 96 node, "samsung,i2s-bit-clk-framesize", -1); 97 error |= i2s->bfs; 98 debug("bfs = %d\n", i2s->bfs); 99 if (error == -1) { 100 debug("fail to get sound i2s node properties\n"); 101 return -1; 102 } 103 #else 104 i2s->base_address = samsung_get_base_i2s(); 105 i2s->audio_pll_clk = I2S_PLL_CLK; 106 i2s->samplingrate = I2S_SAMPLING_RATE; 107 i2s->bitspersample = I2S_BITS_PER_SAMPLE; 108 i2s->channels = I2S_CHANNELS; 109 i2s->rfs = I2S_RFS; 110 i2s->bfs = I2S_BFS; 111 #endif 112 return 0; 113 } 114 115 /* 116 * Init codec 117 * 118 * @param blob FDT blob 119 * @param pi2s_tx i2s parameters required by codec 120 * @return int value, 0 for success 121 */ 122 static int codec_init(const void *blob, struct i2stx_info *pi2s_tx) 123 { 124 int ret; 125 const char *codectype; 126 #ifdef CONFIG_OF_CONTROL 127 int node; 128 129 /* Get the node from FDT for sound */ 130 node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS5_SOUND); 131 if (node <= 0) { 132 debug("EXYNOS_SOUND: No node for sound in device tree\n"); 133 debug("node = %d\n", node); 134 return -1; 135 } 136 137 /* 138 * Get the pre-defined sound codec specific values from FDT. 139 * All of these are expected to be correct otherwise sound 140 * can not be played 141 */ 142 codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL); 143 debug("device = %s\n", codectype); 144 #else 145 codectype = AUDIO_CODEC; 146 #endif 147 if (!strcmp(codectype, "wm8994")) { 148 /* Check the codec type and initialise the same */ 149 ret = wm8994_init(blob, WM8994_AIF2, 150 pi2s_tx->samplingrate, 151 (pi2s_tx->samplingrate * (pi2s_tx->rfs)), 152 pi2s_tx->bitspersample, pi2s_tx->channels); 153 } else if (!strcmp(codectype, "max98095")) { 154 ret = max98095_init(blob, pi2s_tx->samplingrate, 155 (pi2s_tx->samplingrate * (pi2s_tx->rfs)), 156 pi2s_tx->bitspersample); 157 } else { 158 debug("%s: Unknown codec type %s\n", __func__, codectype); 159 return -1; 160 } 161 162 if (ret) { 163 debug("%s: Codec init failed\n", __func__); 164 return -1; 165 } 166 167 return 0; 168 } 169 170 int sound_init(const void *blob) 171 { 172 int ret; 173 struct i2stx_info *pi2s_tx = &g_i2stx_pri; 174 175 /* Get the I2S Values */ 176 if (get_sound_i2s_values(pi2s_tx, blob) < 0) { 177 debug(" FDT I2S values failed\n"); 178 return -1; 179 } 180 181 if (codec_init(blob, pi2s_tx) < 0) { 182 debug(" Codec init failed\n"); 183 return -1; 184 } 185 186 ret = i2s_tx_init(pi2s_tx); 187 if (ret) { 188 debug("%s: Failed to init i2c transmit: ret=%d\n", __func__, 189 ret); 190 return ret; 191 } 192 193 194 return ret; 195 } 196 197 /* 198 * Generates square wave sound data for 1 second 199 * 200 * @param data data buffer pointer 201 * @param size size of the buffer 202 * @param freq frequency of the wave 203 */ 204 static void sound_prepare_buffer(unsigned short *data, int size, uint32_t freq) 205 { 206 const int sample = 48000; 207 const unsigned short amplitude = 16000; /* between 1 and 32767 */ 208 const int period = freq ? sample / freq : 0; 209 const int half = period / 2; 210 211 assert(freq); 212 213 /* Make sure we don't overflow our buffer */ 214 if (size % 2) 215 size--; 216 217 while (size) { 218 int i; 219 for (i = 0; size && i < half; i++) { 220 size -= 2; 221 *data++ = amplitude; 222 *data++ = amplitude; 223 } 224 for (i = 0; size && i < period - half; i++) { 225 size -= 2; 226 *data++ = -amplitude; 227 *data++ = -amplitude; 228 } 229 } 230 } 231 232 int sound_play(uint32_t msec, uint32_t frequency) 233 { 234 unsigned int *data; 235 unsigned long data_size; 236 unsigned int ret = 0; 237 238 /*Buffer length computation */ 239 data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels; 240 data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE); 241 data = malloc(data_size); 242 243 if (data == NULL) { 244 debug("%s: malloc failed\n", __func__); 245 return -1; 246 } 247 248 sound_prepare_buffer((unsigned short *)data, 249 data_size / sizeof(unsigned short), frequency); 250 251 while (msec >= 1000) { 252 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, 253 (data_size / sizeof(int))); 254 msec -= 1000; 255 } 256 if (msec) { 257 unsigned long size = 258 (data_size * msec) / (sizeof(int) * 1000); 259 260 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size); 261 } 262 263 free(data); 264 265 return ret; 266 } 267