1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2012 Samsung Electronics 4 * R. Chandrasekar <rcsekar (at) samsung.com> 5 */ 6 7 #include <malloc.h> 8 #include <common.h> 9 #include <asm/io.h> 10 #include <linux/libfdt.h> 11 #include <fdtdec.h> 12 #include <i2c.h> 13 #include <i2s.h> 14 #include <sound.h> 15 #include <asm/arch/sound.h> 16 #include "wm8994.h" 17 #include "max98095.h" 18 19 /* defines */ 20 #define SOUND_400_HZ 400 21 #define SOUND_BITS_IN_BYTE 8 22 23 static struct i2stx_info g_i2stx_pri; 24 25 /* 26 * get_sound_i2s_values gets values for i2s parameters 27 * 28 * @param i2stx_info i2s transmitter transfer param structure 29 * @param blob FDT blob if enabled else NULL 30 */ 31 static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob) 32 { 33 int node; 34 int error = 0; 35 int base; 36 37 node = fdt_path_offset(blob, "i2s"); 38 if (node <= 0) { 39 debug("EXYNOS_SOUND: No node for sound in device tree\n"); 40 return -1; 41 } 42 43 /* 44 * Get the pre-defined sound specific values from FDT. 45 * All of these are expected to be correct otherwise 46 * wrong register values in i2s setup parameters 47 * may result in no sound play. 48 */ 49 base = fdtdec_get_addr(blob, node, "reg"); 50 if (base == FDT_ADDR_T_NONE) { 51 debug("%s: Missing i2s base\n", __func__); 52 return -1; 53 } 54 i2s->base_address = base; 55 56 i2s->audio_pll_clk = fdtdec_get_int(blob, 57 node, "samsung,i2s-epll-clock-frequency", -1); 58 error |= i2s->audio_pll_clk; 59 debug("audio_pll_clk = %d\n", i2s->audio_pll_clk); 60 i2s->samplingrate = fdtdec_get_int(blob, 61 node, "samsung,i2s-sampling-rate", -1); 62 error |= i2s->samplingrate; 63 debug("samplingrate = %d\n", i2s->samplingrate); 64 i2s->bitspersample = fdtdec_get_int(blob, 65 node, "samsung,i2s-bits-per-sample", -1); 66 error |= i2s->bitspersample; 67 debug("bitspersample = %d\n", i2s->bitspersample); 68 i2s->channels = fdtdec_get_int(blob, 69 node, "samsung,i2s-channels", -1); 70 error |= i2s->channels; 71 debug("channels = %d\n", i2s->channels); 72 i2s->rfs = fdtdec_get_int(blob, 73 node, "samsung,i2s-lr-clk-framesize", -1); 74 error |= i2s->rfs; 75 debug("rfs = %d\n", i2s->rfs); 76 i2s->bfs = fdtdec_get_int(blob, 77 node, "samsung,i2s-bit-clk-framesize", -1); 78 error |= i2s->bfs; 79 debug("bfs = %d\n", i2s->bfs); 80 81 i2s->id = fdtdec_get_int(blob, node, "samsung,i2s-id", -1); 82 error |= i2s->id; 83 debug("id = %d\n", i2s->id); 84 85 if (error == -1) { 86 debug("fail to get sound i2s node properties\n"); 87 return -1; 88 } 89 90 return 0; 91 } 92 93 /* 94 * Init codec 95 * 96 * @param blob FDT blob 97 * @param pi2s_tx i2s parameters required by codec 98 * @return int value, 0 for success 99 */ 100 static int codec_init(const void *blob, struct i2stx_info *pi2s_tx) 101 { 102 int ret; 103 const char *codectype; 104 int node; 105 106 /* Get the node from FDT for sound */ 107 node = fdt_path_offset(blob, "i2s"); 108 if (node <= 0) { 109 debug("EXYNOS_SOUND: No node for sound in device tree\n"); 110 debug("node = %d\n", node); 111 return -1; 112 } 113 114 /* 115 * Get the pre-defined sound codec specific values from FDT. 116 * All of these are expected to be correct otherwise sound 117 * can not be played 118 */ 119 codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL); 120 debug("device = %s\n", codectype); 121 if (!strcmp(codectype, "wm8994")) { 122 /* Check the codec type and initialise the same */ 123 ret = wm8994_init(blob, pi2s_tx->id + 1, 124 pi2s_tx->samplingrate, 125 (pi2s_tx->samplingrate * (pi2s_tx->rfs)), 126 pi2s_tx->bitspersample, pi2s_tx->channels); 127 } else if (!strcmp(codectype, "max98095")) { 128 ret = max98095_init(blob, pi2s_tx->id + 1, 129 pi2s_tx->samplingrate, 130 (pi2s_tx->samplingrate * (pi2s_tx->rfs)), 131 pi2s_tx->bitspersample); 132 } else { 133 debug("%s: Unknown codec type %s\n", __func__, codectype); 134 return -1; 135 } 136 137 if (ret) { 138 debug("%s: Codec init failed\n", __func__); 139 return -1; 140 } 141 142 return 0; 143 } 144 145 int sound_init(const void *blob) 146 { 147 int ret; 148 struct i2stx_info *pi2s_tx = &g_i2stx_pri; 149 150 /* Get the I2S Values */ 151 if (get_sound_i2s_values(pi2s_tx, blob) < 0) { 152 debug(" FDT I2S values failed\n"); 153 return -1; 154 } 155 156 if (codec_init(blob, pi2s_tx) < 0) { 157 debug(" Codec init failed\n"); 158 return -1; 159 } 160 161 ret = i2s_tx_init(pi2s_tx); 162 if (ret) { 163 debug("%s: Failed to init i2c transmit: ret=%d\n", __func__, 164 ret); 165 return ret; 166 } 167 168 169 return ret; 170 } 171 172 int sound_play(uint32_t msec, uint32_t frequency) 173 { 174 unsigned int *data; 175 unsigned long data_size; 176 unsigned int ret = 0; 177 178 /*Buffer length computation */ 179 data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels; 180 data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE); 181 data = malloc(data_size); 182 183 if (data == NULL) { 184 debug("%s: malloc failed\n", __func__); 185 return -1; 186 } 187 188 sound_create_square_wave((unsigned short *)data, 189 data_size / sizeof(unsigned short), 190 frequency); 191 192 while (msec >= 1000) { 193 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, 194 (data_size / sizeof(int))); 195 msec -= 1000; 196 } 197 if (msec) { 198 unsigned long size = 199 (data_size * msec) / (sizeof(int) * 1000); 200 201 ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size); 202 } 203 204 free(data); 205 206 return ret; 207 } 208
