diff options
Diffstat (limited to 'drivers/sound')
| -rw-r--r-- | drivers/sound/Makefile | 47 | ||||
| -rw-r--r-- | drivers/sound/samsung-i2s.c | 358 | ||||
| -rw-r--r-- | drivers/sound/sound.c | 228 |
3 files changed, 633 insertions, 0 deletions
diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile new file mode 100644 index 000000000..18ad2c9a7 --- /dev/null +++ b/drivers/sound/Makefile @@ -0,0 +1,47 @@ +# +# Copyright (C) 2012 Samsung Electronics +# R. Chandrasekar <rcsekar@samsung.com> +# +# 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 $(TOPDIR)/config.mk + +LIB := $(obj)libsound.o + +COBJS-$(CONFIG_SOUND) += sound.o +COBJS-$(CONFIG_I2S) += samsung-i2s.o + +COBJS := $(COBJS-y) +SRCS := $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS)) + +all: $(LIB) + +$(LIB): $(obj).depend $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +# diff --git a/drivers/sound/samsung-i2s.c b/drivers/sound/samsung-i2s.c new file mode 100644 index 000000000..9f3117dd9 --- /dev/null +++ b/drivers/sound/samsung-i2s.c @@ -0,0 +1,358 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * R. Chandrasekar <rcsekar@samsung.com> + * + * 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 <asm/arch/clk.h> +#include <asm/arch/pinmux.h> +#include <asm/arch/i2s-regs.h> +#include <asm/io.h> +#include <common.h> +#include <sound.h> +#include <i2s.h> + +#define FIC_TX2COUNT(x) (((x) >> 24) & 0xf) +#define FIC_TX1COUNT(x) (((x) >> 16) & 0xf) +#define FIC_TXCOUNT(x) (((x) >> 8) & 0xf) +#define FIC_RXCOUNT(x) (((x) >> 0) & 0xf) +#define FICS_TXCOUNT(x) (((x) >> 8) & 0x7f) + +#define TIMEOUT_I2S_TX 100 /* i2s transfer timeout */ + +/* + * Sets the frame size for I2S LR clock + * + * @param i2s_reg i2s regiter address + * @param rfs Frame Size + */ +static void i2s_set_lr_framesize(struct i2s_reg *i2s_reg, unsigned int rfs) +{ + unsigned int mod = readl(&i2s_reg->mod); + + mod &= ~MOD_RCLK_MASK; + + switch (rfs) { + case 768: + mod |= MOD_RCLK_768FS; + break; + case 512: + mod |= MOD_RCLK_512FS; + break; + case 384: + mod |= MOD_RCLK_384FS; + break; + default: + mod |= MOD_RCLK_256FS; + break; + } + + writel(mod, &i2s_reg->mod); +} + +/* + * Sets the i2s transfer control + * + * @param i2s_reg i2s regiter address + * @param on 1 enable tx , 0 disable tx transfer + */ +static void i2s_txctrl(struct i2s_reg *i2s_reg, int on) +{ + unsigned int con = readl(&i2s_reg->con); + unsigned int mod = readl(&i2s_reg->mod) & ~MOD_MASK; + + if (on) { + con |= CON_ACTIVE; + con &= ~CON_TXCH_PAUSE; + + } else { + + con |= CON_TXCH_PAUSE; + con &= ~CON_ACTIVE; + } + + writel(mod, &i2s_reg->mod); + writel(con, &i2s_reg->con); +} + +/* + * set the bit clock frame size (in multiples of LRCLK) + * + * @param i2s_reg i2s regiter address + * @param bfs bit Frame Size + */ +static void i2s_set_bitclk_framesize(struct i2s_reg *i2s_reg, unsigned bfs) +{ + unsigned int mod = readl(&i2s_reg->mod); + + mod &= ~MOD_BCLK_MASK; + + switch (bfs) { + case 48: + mod |= MOD_BCLK_48FS; + break; + case 32: + mod |= MOD_BCLK_32FS; + break; + case 24: + mod |= MOD_BCLK_24FS; + break; + case 16: + mod |= MOD_BCLK_16FS; + break; + default: + return; + } + writel(mod, &i2s_reg->mod); +} + +/* + * flushes the i2stx fifo + * + * @param i2s_reg i2s regiter address + * @param flush Tx fifo flush command (0x00 - do not flush + * 0x80 - flush tx fifo) + */ +void i2s_fifo(struct i2s_reg *i2s_reg, unsigned int flush) +{ + /* Flush the FIFO */ + setbits_le32(&i2s_reg->fic, flush); + clrbits_le32(&i2s_reg->fic, flush); +} + +/* + * Set System Clock direction + * + * @param i2s_reg i2s regiter address + * @param dir Clock direction + * + * @return int value 0 for success, -1 in case of error + */ +int i2s_set_sysclk_dir(struct i2s_reg *i2s_reg, int dir) +{ + unsigned int mod = readl(&i2s_reg->mod); + + if (dir == SND_SOC_CLOCK_IN) + mod |= MOD_CDCLKCON; + else + mod &= ~MOD_CDCLKCON; + + writel(mod, &i2s_reg->mod); + + return 0; +} + +/* + * Sets I2S Clcok format + * + * @param fmt i2s clock properties + * @param i2s_reg i2s regiter address + * + * @return int value 0 for success, -1 in case of error + */ +int i2s_set_fmt(struct i2s_reg *i2s_reg, unsigned int fmt) +{ + unsigned int mod = readl(&i2s_reg->mod); + unsigned int tmp = 0; + unsigned int ret = 0; + + /* Format is priority */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + tmp |= MOD_LR_RLOW; + tmp |= MOD_SDF_MSB; + break; + case SND_SOC_DAIFMT_LEFT_J: + tmp |= MOD_LR_RLOW; + tmp |= MOD_SDF_LSB; + break; + case SND_SOC_DAIFMT_I2S: + tmp |= MOD_SDF_IIS; + break; + default: + debug("%s: Invalid format priority [0x%x]\n", __func__, + (fmt & SND_SOC_DAIFMT_FORMAT_MASK)); + return -1; + } + + /* + * INV flag is relative to the FORMAT flag - if set it simply + * flips the polarity specified by the Standard + */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_NB_IF: + if (tmp & MOD_LR_RLOW) + tmp &= ~MOD_LR_RLOW; + else + tmp |= MOD_LR_RLOW; + break; + default: + debug("%s: Invalid clock ploarity input [0x%x]\n", __func__, + (fmt & SND_SOC_DAIFMT_INV_MASK)); + return -1; + } + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBS_CFS: + tmp |= MOD_SLAVE; + break; + case SND_SOC_DAIFMT_CBM_CFM: + /* Set default source clock in Master mode */ + ret = i2s_set_sysclk_dir(i2s_reg, SND_SOC_CLOCK_OUT); + if (ret != 0) { + debug("%s:set i2s clock direction failed\n", __func__); + return -1; + } + break; + default: + debug("%s: Invalid master selection [0x%x]\n", __func__, + (fmt & SND_SOC_DAIFMT_MASTER_MASK)); + return -1; + } + + mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE); + mod |= tmp; + writel(mod, &i2s_reg->mod); + + return 0; +} + +/* + * Sets the sample width in bits + * + * @param blc samplewidth (size of sample in bits) + * @param i2s_reg i2s regiter address + * + * @return int value 0 for success, -1 in case of error + */ +int i2s_set_samplesize(struct i2s_reg *i2s_reg, unsigned int blc) +{ + unsigned int mod = readl(&i2s_reg->mod); + + mod &= ~MOD_BLCP_MASK; + mod &= ~MOD_BLC_MASK; + + switch (blc) { + case 8: + mod |= MOD_BLCP_8BIT; + mod |= MOD_BLC_8BIT; + break; + case 16: + mod |= MOD_BLCP_16BIT; + mod |= MOD_BLC_16BIT; + break; + case 24: + mod |= MOD_BLCP_24BIT; + mod |= MOD_BLC_24BIT; + break; + default: + debug("%s: Invalid sample size input [0x%x]\n", + __func__, blc); + return -1; + } + writel(mod, &i2s_reg->mod); + + return 0; +} + +int i2s_transfer_tx_data(struct i2stx_info *pi2s_tx, unsigned int *data, + unsigned long data_size) +{ + int i; + int start; + struct i2s_reg *i2s_reg = + (struct i2s_reg *)pi2s_tx->base_address; + + if (data_size < FIFO_LENGTH) { + debug("%s : Invalid data size\n", __func__); + return -1; /* invalid pcm data size */ + } + + /* fill the tx buffer before stating the tx transmit */ + for (i = 0; i < FIFO_LENGTH; i++) + writel(*data++, &i2s_reg->txd); + + data_size -= FIFO_LENGTH; + i2s_txctrl(i2s_reg, I2S_TX_ON); + + while (data_size > 0) { + start = get_timer(0); + if (!(CON_TXFIFO_FULL & (readl(&i2s_reg->con)))) { + writel(*data++, &i2s_reg->txd); + data_size--; + } else { + if (get_timer(start) > TIMEOUT_I2S_TX) { + i2s_txctrl(i2s_reg, I2S_TX_OFF); + debug("%s: I2S Transfer Timeout\n", __func__); + return -1; + } + } + } + i2s_txctrl(i2s_reg, I2S_TX_OFF); + + return 0; +} + +int i2s_tx_init(struct i2stx_info *pi2s_tx) +{ + int ret; + struct i2s_reg *i2s_reg = + (struct i2s_reg *)pi2s_tx->base_address; + + /* Initialize GPIO for I2s */ + exynos_pinmux_config(PERIPH_ID_I2S1, 0); + + /* Set EPLL Clock */ + ret = set_epll_clk(pi2s_tx->audio_pll_clk); + if (ret != 0) { + debug("%s: epll clock set rate falied\n", __func__); + return -1; + } + + /* Select Clk Source for Audio1 */ + set_i2s_clk_source(); + + /* Set Prescaler to get MCLK */ + set_i2s_clk_prescaler(pi2s_tx->audio_pll_clk, + (pi2s_tx->samplingrate * (pi2s_tx->rfs))); + + /* Configure I2s format */ + ret = i2s_set_fmt(i2s_reg, (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM)); + if (ret == 0) { + i2s_set_lr_framesize(i2s_reg, pi2s_tx->rfs); + ret = i2s_set_samplesize(i2s_reg, pi2s_tx->bitspersample); + if (ret != 0) { + debug("%s:set sample rate failed\n", __func__); + return -1; + } + + i2s_set_bitclk_framesize(i2s_reg, pi2s_tx->bfs); + /* disable i2s transfer flag and flush the fifo */ + i2s_txctrl(i2s_reg, I2S_TX_OFF); + i2s_fifo(i2s_reg, FIC_TXFLUSH); + } else { + debug("%s: failed\n", __func__); + } + + return ret; +} diff --git a/drivers/sound/sound.c b/drivers/sound/sound.c new file mode 100644 index 000000000..4c74534c9 --- /dev/null +++ b/drivers/sound/sound.c @@ -0,0 +1,228 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * R. Chandrasekar <rcsekar@samsung.com> + * + * 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 <malloc.h> +#include <common.h> +#include <asm/io.h> +#include <i2c.h> +#include <i2s.h> +#include <sound.h> +#include "wm8994.h" +#include <asm/arch/sound.h> + +/* defines */ +#define SOUND_400_HZ 400 +#define SOUND_BITS_IN_BYTE 8 + +static struct i2stx_info g_i2stx_pri; +static struct sound_codec_info g_codec_info; + +/* + * get_sound_fdt_values gets fdt values for i2s parameters + * + * @param i2stx_info i2s transmitter transfer param structure + * @param blob FDT blob + */ +static void get_sound_i2s_values(struct i2stx_info *i2s) +{ + 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; +} + +/* + * Gets fdt values for wm8994 config parameters + * + * @param pcodec_info codec information structure + * @param blob FDT blob + * @return int value, 0 for success + */ +static int get_sound_wm8994_values(struct sound_codec_info *pcodec_info) +{ + int error = 0; + + switch (AUDIO_COMPAT) { + case AUDIO_COMPAT_SPI: + debug("%s: Support not added for SPI interface\n", __func__); + return -1; + break; + case AUDIO_COMPAT_I2C: + pcodec_info->i2c_bus = AUDIO_I2C_BUS; + pcodec_info->i2c_dev_addr = AUDIO_I2C_REG; + debug("i2c dev addr = %d\n", pcodec_info->i2c_dev_addr); + break; + default: + debug("%s: Unknown compat id %d\n", __func__, AUDIO_COMPAT); + return -1; + } + + if (error == -1) { + debug("fail to get wm8994 codec node properties\n"); + return -1; + } + + return 0; +} + +/* + * Gets fdt values for codec config parameters + * + * @param pcodec_info codec information structure + * @param blob FDT blob + * @return int value, 0 for success + */ +static int get_sound_codec_values(struct sound_codec_info *pcodec_info) +{ + int error = 0; + const char *codectype; + + codectype = AUDIO_CODEC; + + if (!strcmp(codectype, "wm8994")) { + pcodec_info->codec_type = CODEC_WM_8994; + error = get_sound_wm8994_values(pcodec_info); + } else { + error = -1; + } + + if (error == -1) { + debug("fail to get sound codec node properties\n"); + return -1; + } + + return 0; +} + +int sound_init(void) +{ + int ret; + struct i2stx_info *pi2s_tx = &g_i2stx_pri; + struct sound_codec_info *pcodec_info = &g_codec_info; + + /* Get the I2S Values */ + get_sound_i2s_values(pi2s_tx); + + /* Get the codec Values */ + if (get_sound_codec_values(pcodec_info) < 0) + return -1; + + ret = i2s_tx_init(pi2s_tx); + if (ret) { + debug("%s: Failed to init i2c transmit: ret=%d\n", __func__, + ret); + return ret; + } + + /* Check the codec type and initialise the same */ + if (pcodec_info->codec_type == CODEC_WM_8994) { + ret = wm8994_init(pcodec_info, WM8994_AIF2, + pi2s_tx->samplingrate, + (pi2s_tx->samplingrate * (pi2s_tx->rfs)), + pi2s_tx->bitspersample, pi2s_tx->channels); + } else { + debug("%s: Unknown code type %d\n", __func__, + pcodec_info->codec_type); + return -1; + } + if (ret) { + debug("%s: Codec init failed\n", __func__); + return -1; + } + + 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; +} |