diff options
Diffstat (limited to 'drivers/sound/sound-i2s.c')
| -rw-r--r-- | drivers/sound/sound-i2s.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/sound/sound-i2s.c b/drivers/sound/sound-i2s.c new file mode 100644 index 0000000..749bbbd --- /dev/null +++ b/drivers/sound/sound-i2s.c @@ -0,0 +1,208 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * R. Chandrasekar <rcsekar@samsung.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <malloc.h> +#include <common.h> +#include <asm/io.h> +#include <libfdt.h> +#include <fdtdec.h> +#include <i2c.h> +#include <i2s.h> +#include <sound.h> +#include <asm/arch/sound.h> +#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) +{ + int node; + int error = 0; + int base; + + node = fdt_path_offset(blob, "i2s"); + 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); + + i2s->id = fdtdec_get_int(blob, node, "samsung,i2s-id", -1); + error |= i2s->id; + debug("id = %d\n", i2s->id); + + if (error == -1) { + debug("fail to get sound i2s node properties\n"); + return -1; + } + + 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; + int node; + + /* Get the node from FDT for sound */ + node = fdt_path_offset(blob, "i2s"); + 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); + if (!strcmp(codectype, "wm8994")) { + /* Check the codec type and initialise the same */ + ret = wm8994_init(blob, pi2s_tx->id + 1, + 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->id + 1, + 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; +} + +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_create_square_wave((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; +} |