/* * Copyright (C) 2012 Samsung Electronics * R. Chandrasekar * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include #include #include #include #include #include #include #include "wm8994.h" #include "max98095.h" /* defines */ #define SOUND_400_HZ 400 #define SOUND_BITS_IN_BYTE 8 static struct i2stx_info g_i2stx_pri; /* * get_sound_i2s_values gets values for i2s parameters * * @param i2stx_info i2s transmitter transfer param structure * @param blob FDT blob if enabled else NULL */ static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob) { #ifdef CONFIG_OF_CONTROL int node; int error = 0; int base; node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS5_SOUND); if (node <= 0) { debug("EXYNOS_SOUND: No node for sound in device tree\n"); return -1; } /* * Get the pre-defined sound specific values from FDT. * All of these are expected to be correct otherwise * wrong register values in i2s setup parameters * may result in no sound play. */ base = fdtdec_get_addr(blob, node, "reg"); if (base == FDT_ADDR_T_NONE) { debug("%s: Missing i2s base\n", __func__); return -1; } i2s->base_address = base; i2s->audio_pll_clk = fdtdec_get_int(blob, node, "samsung,i2s-epll-clock-frequency", -1); error |= i2s->audio_pll_clk; debug("audio_pll_clk = %d\n", i2s->audio_pll_clk); i2s->samplingrate = fdtdec_get_int(blob, node, "samsung,i2s-sampling-rate", -1); error |= i2s->samplingrate; debug("samplingrate = %d\n", i2s->samplingrate); i2s->bitspersample = fdtdec_get_int(blob, node, "samsung,i2s-bits-per-sample", -1); error |= i2s->bitspersample; debug("bitspersample = %d\n", i2s->bitspersample); i2s->channels = fdtdec_get_int(blob, node, "samsung,i2s-channels", -1); error |= i2s->channels; debug("channels = %d\n", i2s->channels); i2s->rfs = fdtdec_get_int(blob, node, "samsung,i2s-lr-clk-framesize", -1); error |= i2s->rfs; debug("rfs = %d\n", i2s->rfs); i2s->bfs = fdtdec_get_int(blob, node, "samsung,i2s-bit-clk-framesize", -1); error |= i2s->bfs; debug("bfs = %d\n", i2s->bfs); if (error == -1) { debug("fail to get sound i2s node properties\n"); return -1; } #else i2s->base_address = samsung_get_base_i2s(); i2s->audio_pll_clk = I2S_PLL_CLK; i2s->samplingrate = I2S_SAMPLING_RATE; i2s->bitspersample = I2S_BITS_PER_SAMPLE; i2s->channels = I2S_CHANNELS; i2s->rfs = I2S_RFS; i2s->bfs = I2S_BFS; #endif return 0; } /* * Init codec * * @param blob FDT blob * @param pi2s_tx i2s parameters required by codec * @return int value, 0 for success */ static int codec_init(const void *blob, struct i2stx_info *pi2s_tx) { int ret; const char *codectype; #ifdef CONFIG_OF_CONTROL int node; /* Get the node from FDT for sound */ node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS5_SOUND); if (node <= 0) { debug("EXYNOS_SOUND: No node for sound in device tree\n"); debug("node = %d\n", node); return -1; } /* * Get the pre-defined sound codec specific values from FDT. * All of these are expected to be correct otherwise sound * can not be played */ codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL); debug("device = %s\n", codectype); #else codectype = AUDIO_CODEC; #endif if (!strcmp(codectype, "wm8994")) { /* Check the codec type and initialise the same */ ret = wm8994_init(blob, WM8994_AIF2, pi2s_tx->samplingrate, (pi2s_tx->samplingrate * (pi2s_tx->rfs)), pi2s_tx->bitspersample, pi2s_tx->channels); } else if (!strcmp(codectype, "max98095")) { ret = max98095_init(blob, pi2s_tx->samplingrate, (pi2s_tx->samplingrate * (pi2s_tx->rfs)), pi2s_tx->bitspersample); } else { debug("%s: Unknown codec type %s\n", __func__, codectype); return -1; } if (ret) { debug("%s: Codec init failed\n", __func__); return -1; } return 0; } int sound_init(const void *blob) { int ret; struct i2stx_info *pi2s_tx = &g_i2stx_pri; /* Get the I2S Values */ if (get_sound_i2s_values(pi2s_tx, blob) < 0) { debug(" FDT I2S values failed\n"); return -1; } if (codec_init(blob, pi2s_tx) < 0) { debug(" Codec init failed\n"); return -1; } ret = i2s_tx_init(pi2s_tx); if (ret) { debug("%s: Failed to init i2c transmit: ret=%d\n", __func__, ret); return ret; } return ret; } /* * Generates square wave sound data for 1 second * * @param data data buffer pointer * @param size size of the buffer * @param freq frequency of the wave */ static void sound_prepare_buffer(unsigned short *data, int size, uint32_t freq) { const int sample = 48000; const unsigned short amplitude = 16000; /* between 1 and 32767 */ const int period = freq ? sample / freq : 0; const int half = period / 2; assert(freq); /* Make sure we don't overflow our buffer */ if (size % 2) size--; while (size) { int i; for (i = 0; size && i < half; i++) { size -= 2; *data++ = amplitude; *data++ = amplitude; } for (i = 0; size && i < period - half; i++) { size -= 2; *data++ = -amplitude; *data++ = -amplitude; } } } int sound_play(uint32_t msec, uint32_t frequency) { unsigned int *data; unsigned long data_size; unsigned int ret = 0; /*Buffer length computation */ data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels; data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE); data = malloc(data_size); if (data == NULL) { debug("%s: malloc failed\n", __func__); return -1; } sound_prepare_buffer((unsigned short *)data, data_size / sizeof(unsigned short), frequency); while (msec >= 1000) { ret = i2s_transfer_tx_data(&g_i2stx_pri, data, (data_size / sizeof(int))); msec -= 1000; } if (msec) { unsigned long size = (data_size * msec) / (sizeof(int) * 1000); ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size); } free(data); return ret; }