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f482310c6d
This patch adds FDT support to the sound driver. Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
261 lines
6.5 KiB
C
261 lines
6.5 KiB
C
/*
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* Copyright (C) 2012 Samsung Electronics
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* R. Chandrasekar <rcsekar@samsung.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <malloc.h>
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#include <common.h>
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#include <asm/io.h>
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#include <libfdt.h>
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#include <fdtdec.h>
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#include <i2c.h>
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#include <i2s.h>
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#include <sound.h>
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#include <asm/arch/sound.h>
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#include "wm8994.h"
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/* defines */
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#define SOUND_400_HZ 400
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#define SOUND_BITS_IN_BYTE 8
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static struct i2stx_info g_i2stx_pri;
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/*
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* get_sound_i2s_values gets values for i2s parameters
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*
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* @param i2stx_info i2s transmitter transfer param structure
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* @param blob FDT blob if enabled else NULL
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*/
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static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob)
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{
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#ifdef CONFIG_OF_CONTROL
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int node;
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int error = 0;
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int base;
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node = fdtdec_next_compatible(blob, 0,
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COMPAT_SAMSUNG_EXYNOS5_SOUND);
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if (node <= 0) {
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debug("EXYNOS_SOUND: No node for sound in device tree\n");
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return -1;
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}
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/*
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* Get the pre-defined sound specific values from FDT.
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* All of these are expected to be correct otherwise
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* wrong register values in i2s setup parameters
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* may result in no sound play.
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*/
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base = fdtdec_get_addr(blob, node, "reg");
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if (base == FDT_ADDR_T_NONE) {
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debug("%s: Missing i2s base\n", __func__);
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return -1;
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}
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i2s->base_address = base;
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i2s->audio_pll_clk = fdtdec_get_int(blob,
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node, "samsung,i2s-epll-clock-frequency", -1);
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error |= i2s->audio_pll_clk;
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debug("audio_pll_clk = %d\n", i2s->audio_pll_clk);
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i2s->samplingrate = fdtdec_get_int(blob,
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node, "samsung,i2s-sampling-rate", -1);
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error |= i2s->samplingrate;
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debug("samplingrate = %d\n", i2s->samplingrate);
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i2s->bitspersample = fdtdec_get_int(blob,
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node, "samsung,i2s-bits-per-sample", -1);
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error |= i2s->bitspersample;
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debug("bitspersample = %d\n", i2s->bitspersample);
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i2s->channels = fdtdec_get_int(blob,
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node, "samsung,i2s-channels", -1);
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error |= i2s->channels;
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debug("channels = %d\n", i2s->channels);
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i2s->rfs = fdtdec_get_int(blob,
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node, "samsung,i2s-lr-clk-framesize", -1);
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error |= i2s->rfs;
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debug("rfs = %d\n", i2s->rfs);
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i2s->bfs = fdtdec_get_int(blob,
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node, "samsung,i2s-bit-clk-framesize", -1);
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error |= i2s->bfs;
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debug("bfs = %d\n", i2s->bfs);
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if (error == -1) {
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debug("fail to get sound i2s node properties\n");
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return -1;
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}
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#else
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i2s->base_address = samsung_get_base_i2s();
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i2s->audio_pll_clk = I2S_PLL_CLK;
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i2s->samplingrate = I2S_SAMPLING_RATE;
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i2s->bitspersample = I2S_BITS_PER_SAMPLE;
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i2s->channels = I2S_CHANNELS;
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i2s->rfs = I2S_RFS;
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i2s->bfs = I2S_BFS;
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#endif
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return 0;
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}
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/*
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* Init codec
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*
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* @param blob FDT blob
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* @param pi2s_tx i2s parameters required by codec
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* @return int value, 0 for success
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*/
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static int codec_init(const void *blob, struct i2stx_info *pi2s_tx)
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{
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int ret;
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const char *codectype;
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#ifdef CONFIG_OF_CONTROL
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int node;
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/* Get the node from FDT for sound */
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node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS5_SOUND);
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if (node <= 0) {
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debug("EXYNOS_SOUND: No node for sound in device tree\n");
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debug("node = %d\n", node);
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return -1;
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}
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/*
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* Get the pre-defined sound codec specific values from FDT.
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* All of these are expected to be correct otherwise sound
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* can not be played
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*/
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codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL);
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debug("device = %s\n", codectype);
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#else
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codectype = AUDIO_CODEC;
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#endif
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if (!strcmp(codectype, "wm8994")) {
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/* Check the codec type and initialise the same */
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ret = wm8994_init(blob, WM8994_AIF2,
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pi2s_tx->samplingrate,
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(pi2s_tx->samplingrate * (pi2s_tx->rfs)),
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pi2s_tx->bitspersample, pi2s_tx->channels);
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} else {
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debug("%s: Unknown code type %s\n", __func__,
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codectype);
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return -1;
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}
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if (ret) {
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debug("%s: Codec init failed\n", __func__);
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return -1;
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}
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return 0;
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}
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int sound_init(const void *blob)
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{
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int ret;
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struct i2stx_info *pi2s_tx = &g_i2stx_pri;
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/* Get the I2S Values */
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if (get_sound_i2s_values(pi2s_tx, blob) < 0) {
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debug(" FDT I2S values failed\n");
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return -1;
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}
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if (codec_init(blob, pi2s_tx) < 0) {
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debug(" Codec init failed\n");
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return -1;
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}
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ret = i2s_tx_init(pi2s_tx);
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if (ret) {
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debug("%s: Failed to init i2c transmit: ret=%d\n", __func__,
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ret);
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return ret;
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}
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return ret;
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}
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/*
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* Generates square wave sound data for 1 second
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*
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* @param data data buffer pointer
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* @param size size of the buffer
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* @param freq frequency of the wave
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*/
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static void sound_prepare_buffer(unsigned short *data, int size, uint32_t freq)
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{
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const int sample = 48000;
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const unsigned short amplitude = 16000; /* between 1 and 32767 */
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const int period = freq ? sample / freq : 0;
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const int half = period / 2;
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assert(freq);
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/* Make sure we don't overflow our buffer */
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if (size % 2)
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size--;
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while (size) {
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int i;
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for (i = 0; size && i < half; i++) {
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size -= 2;
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*data++ = amplitude;
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*data++ = amplitude;
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}
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for (i = 0; size && i < period - half; i++) {
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size -= 2;
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*data++ = -amplitude;
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*data++ = -amplitude;
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}
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}
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}
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int sound_play(uint32_t msec, uint32_t frequency)
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{
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unsigned int *data;
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unsigned long data_size;
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unsigned int ret = 0;
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/*Buffer length computation */
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data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels;
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data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE);
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data = malloc(data_size);
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if (data == NULL) {
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debug("%s: malloc failed\n", __func__);
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return -1;
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}
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sound_prepare_buffer((unsigned short *)data,
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data_size / sizeof(unsigned short), frequency);
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while (msec >= 1000) {
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ret = i2s_transfer_tx_data(&g_i2stx_pri, data,
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(data_size / sizeof(int)));
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msec -= 1000;
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}
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if (msec) {
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unsigned long size =
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(data_size * msec) / (sizeof(int) * 1000);
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ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size);
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}
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free(data);
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return ret;
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}
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