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 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 */ 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 } 145 146 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 } 172 173 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