/* * omap-mcbsp.c -- OMAP ALSA SoC DAI driver using McBSP port * * Copyright (C) 2008 Nokia Corporation * * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com> * Peter Ujfalusi <peter.ujfalusi@ti.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * 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., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * */ #include <linux/init.h> #include <linux/module.h> #include <linux/device.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/initval.h> #include <sound/soc.h> #include <plat/dma.h> #include <plat/mcbsp.h> #include "omap-mcbsp.h" #include "omap-pcm.h" #define OMAP_MCBSP_RATES (SNDRV_PCM_RATE_8000_96000) #define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \ xhandler_get, xhandler_put) \ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \ .info = omap_mcbsp_st_info_volsw, \ .get = xhandler_get, .put = xhandler_put, \ .private_value = (unsigned long) &(struct soc_mixer_control) \ {.min = xmin, .max = xmax} } struct omap_mcbsp_data { unsigned int bus_id; struct omap_mcbsp_reg_cfg regs; unsigned int fmt; /* * Flags indicating is the bus already activated and configured by * another substream */ int active; int configured; unsigned int in_freq; int clk_div; int wlen; }; static struct omap_mcbsp_data mcbsp_data[NUM_LINKS]; /* * Stream DMA parameters. DMA request line and port address are set runtime * since they are different between OMAP1 and later OMAPs */ static struct omap_pcm_dma_data omap_mcbsp_dai_dma_params[NUM_LINKS][2]; static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); struct omap_pcm_dma_data *dma_data; int dma_op_mode = omap_mcbsp_get_dma_op_mode(mcbsp_data->bus_id); int words; dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */ if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) /* * Configure McBSP threshold based on either: * packet_size, when the sDMA is in packet mode, or * based on the period size. */ if (dma_data->packet_size) words = dma_data->packet_size; else words = snd_pcm_lib_period_bytes(substream) / (mcbsp_data->wlen / 8); else words = 1; /* Configure McBSP internal buffer usage */ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) omap_mcbsp_set_tx_threshold(mcbsp_data->bus_id, words); else omap_mcbsp_set_rx_threshold(mcbsp_data->bus_id, words); } static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_interval *buffer_size = hw_param_interval(params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE); struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); struct omap_mcbsp_data *mcbsp_data = rule->private; struct snd_interval frames; int size; snd_interval_any(&frames); size = omap_mcbsp_get_fifo_size(mcbsp_data->bus_id); frames.min = size / channels->min; frames.integer = 1; return snd_interval_refine(buffer_size, &frames); } static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); int bus_id = mcbsp_data->bus_id; int err = 0; if (!cpu_dai->active) err = omap_mcbsp_request(bus_id); /* * OMAP3 McBSP FIFO is word structured. * McBSP2 has 1024 + 256 = 1280 word long buffer, * McBSP1,3,4,5 has 128 word long buffer * This means that the size of the FIFO depends on the sample format. * For example on McBSP3: * 16bit samples: size is 128 * 2 = 256 bytes * 32bit samples: size is 128 * 4 = 512 bytes * It is simpler to place constraint for buffer and period based on * channels. * McBSP3 as example again (16 or 32 bit samples): * 1 channel (mono): size is 128 frames (128 words) * 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words) * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words) */ if (cpu_is_omap34xx() || cpu_is_omap44xx()) { /* * Rule for the buffer size. We should not allow * smaller buffer than the FIFO size to avoid underruns */ snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, omap_mcbsp_hwrule_min_buffersize, mcbsp_data, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); /* Make sure, that the period size is always even */ snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2); } return err; } static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); if (!cpu_dai->active) { omap_mcbsp_free(mcbsp_data->bus_id); mcbsp_data->configured = 0; } } static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *cpu_dai) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); int err = 0, play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: mcbsp_data->active++; omap_mcbsp_start(mcbsp_data->bus_id, play, !play); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: omap_mcbsp_stop(mcbsp_data->bus_id, play, !play); mcbsp_data->active--; break; default: err = -EINVAL; } return err; } static snd_pcm_sframes_t omap_mcbsp_dai_delay( struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); u16 fifo_use; snd_pcm_sframes_t delay; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) fifo_use = omap_mcbsp_get_tx_delay(mcbsp_data->bus_id); else fifo_use = omap_mcbsp_get_rx_delay(mcbsp_data->bus_id); /* * Divide the used locations with the channel count to get the * FIFO usage in samples (don't care about partial samples in the * buffer). */ delay = fifo_use / substream->runtime->channels; return delay; } static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *cpu_dai) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs; struct omap_pcm_dma_data *dma_data; int dma, bus_id = mcbsp_data->bus_id; int wlen, channels, wpf, sync_mode = OMAP_DMA_SYNC_ELEMENT; int pkt_size = 0; unsigned long port; unsigned int format, div, framesize, master; dma_data = &omap_mcbsp_dai_dma_params[cpu_dai->id][substream->stream]; dma = omap_mcbsp_dma_ch_params(bus_id, substream->stream); port = omap_mcbsp_dma_reg_params(bus_id, substream->stream); switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: dma_data->data_type = OMAP_DMA_DATA_TYPE_S16; wlen = 16; break; case SNDRV_PCM_FORMAT_S32_LE: dma_data->data_type = OMAP_DMA_DATA_TYPE_S32; wlen = 32; break; default: return -EINVAL; } if (cpu_is_omap34xx() || cpu_is_omap44xx()) { dma_data->set_threshold = omap_mcbsp_set_threshold; /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */ if (omap_mcbsp_get_dma_op_mode(bus_id) == MCBSP_DMA_MODE_THRESHOLD) { int period_words, max_thrsh; period_words = params_period_bytes(params) / (wlen / 8); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) max_thrsh = omap_mcbsp_get_max_tx_threshold( mcbsp_data->bus_id); else max_thrsh = omap_mcbsp_get_max_rx_threshold( mcbsp_data->bus_id); /* * If the period contains less or equal number of words, * we are using the original threshold mode setup: * McBSP threshold = sDMA frame size = period_size * Otherwise we switch to sDMA packet mode: * McBSP threshold = sDMA packet size * sDMA frame size = period size */ if (period_words > max_thrsh) { int divider = 0; /* * Look for the biggest threshold value, which * divides the period size evenly. */ divider = period_words / max_thrsh; if (period_words % max_thrsh) divider++; while (period_words % divider && divider < period_words) divider++; if (divider == period_words) return -EINVAL; pkt_size = period_words / divider; sync_mode = OMAP_DMA_SYNC_PACKET; } else { sync_mode = OMAP_DMA_SYNC_FRAME; } } } dma_data->name = substream->stream ? "Audio Capture" : "Audio Playback"; dma_data->dma_req = dma; dma_data->port_addr = port; dma_data->sync_mode = sync_mode; dma_data->packet_size = pkt_size; snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); if (mcbsp_data->configured) { /* McBSP already configured by another stream */ return 0; } regs->rcr2 &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7)); regs->xcr2 &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7)); regs->rcr1 &= ~(RFRLEN1(0x7f) | RWDLEN1(7)); regs->xcr1 &= ~(XFRLEN1(0x7f) | XWDLEN1(7)); format = mcbsp_data->fmt & SND_SOC_DAIFMT_FORMAT_MASK; wpf = channels = params_channels(params); if (channels == 2 && (format == SND_SOC_DAIFMT_I2S || format == SND_SOC_DAIFMT_LEFT_J)) { /* Use dual-phase frames */ regs->rcr2 |= RPHASE; regs->xcr2 |= XPHASE; /* Set 1 word per (McBSP) frame for phase1 and phase2 */ wpf--; regs->rcr2 |= RFRLEN2(wpf - 1); regs->xcr2 |= XFRLEN2(wpf - 1); } regs->rcr1 |= RFRLEN1(wpf - 1); regs->xcr1 |= XFRLEN1(wpf - 1); switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: /* Set word lengths */ regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_16); regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_16); regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_16); regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_16); break; case SNDRV_PCM_FORMAT_S32_LE: /* Set word lengths */ regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_32); regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_32); regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_32); regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_32); break; default: /* Unsupported PCM format */ return -EINVAL; } /* In McBSP master modes, FRAME (i.e. sample rate) is generated * by _counting_ BCLKs. Calculate frame size in BCLKs */ master = mcbsp_data->fmt & SND_SOC_DAIFMT_MASTER_MASK; if (master == SND_SOC_DAIFMT_CBS_CFS) { div = mcbsp_data->clk_div ? mcbsp_data->clk_div : 1; framesize = (mcbsp_data->in_freq / div) / params_rate(params); if (framesize < wlen * channels) { printk(KERN_ERR "%s: not enough bandwidth for desired rate and " "channels\n", __func__); return -EINVAL; } } else framesize = wlen * channels; /* Set FS period and length in terms of bit clock periods */ regs->srgr2 &= ~FPER(0xfff); regs->srgr1 &= ~FWID(0xff); switch (format) { case SND_SOC_DAIFMT_I2S: case SND_SOC_DAIFMT_LEFT_J: regs->srgr2 |= FPER(framesize - 1); regs->srgr1 |= FWID((framesize >> 1) - 1); break; case SND_SOC_DAIFMT_DSP_A: case SND_SOC_DAIFMT_DSP_B: regs->srgr2 |= FPER(framesize - 1); regs->srgr1 |= FWID(0); break; } omap_mcbsp_config(bus_id, &mcbsp_data->regs); mcbsp_data->wlen = wlen; mcbsp_data->configured = 1; return 0; } /* * This must be called before _set_clkdiv and _set_sysclk since McBSP register * cache is initialized here */ static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs; bool inv_fs = false; if (mcbsp_data->configured) return 0; mcbsp_data->fmt = fmt; memset(regs, 0, sizeof(*regs)); /* Generic McBSP register settings */ regs->spcr2 |= XINTM(3) | FREE; regs->spcr1 |= RINTM(3); /* RFIG and XFIG are not defined in 34xx */ if (!cpu_is_omap34xx() && !cpu_is_omap44xx()) { regs->rcr2 |= RFIG; regs->xcr2 |= XFIG; } if (cpu_is_omap2430() || cpu_is_omap34xx() || cpu_is_omap44xx()) { regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE; regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: /* 1-bit data delay */ regs->rcr2 |= RDATDLY(1); regs->xcr2 |= XDATDLY(1); break; case SND_SOC_DAIFMT_LEFT_J: /* 0-bit data delay */ regs->rcr2 |= RDATDLY(0); regs->xcr2 |= XDATDLY(0); regs->spcr1 |= RJUST(2); /* Invert FS polarity configuration */ inv_fs = true; break; case SND_SOC_DAIFMT_DSP_A: /* 1-bit data delay */ regs->rcr2 |= RDATDLY(1); regs->xcr2 |= XDATDLY(1); /* Invert FS polarity configuration */ inv_fs = true; break; case SND_SOC_DAIFMT_DSP_B: /* 0-bit data delay */ regs->rcr2 |= RDATDLY(0); regs->xcr2 |= XDATDLY(0); /* Invert FS polarity configuration */ inv_fs = true; break; default: /* Unsupported data format */ return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: /* McBSP master. Set FS and bit clocks as outputs */ regs->pcr0 |= FSXM | FSRM | CLKXM | CLKRM; /* Sample rate generator drives the FS */ regs->srgr2 |= FSGM; break; case SND_SOC_DAIFMT_CBM_CFM: /* McBSP slave */ break; default: /* Unsupported master/slave configuration */ return -EINVAL; } /* Set bit clock (CLKX/CLKR) and FS polarities */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: /* * Normal BCLK + FS. * FS active low. TX data driven on falling edge of bit clock * and RX data sampled on rising edge of bit clock. */ regs->pcr0 |= FSXP | FSRP | CLKXP | CLKRP; break; case SND_SOC_DAIFMT_NB_IF: regs->pcr0 |= CLKXP | CLKRP; break; case SND_SOC_DAIFMT_IB_NF: regs->pcr0 |= FSXP | FSRP; break; case SND_SOC_DAIFMT_IB_IF: break; default: return -EINVAL; } if (inv_fs == true) regs->pcr0 ^= FSXP | FSRP; return 0; } static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai, int div_id, int div) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs; if (div_id != OMAP_MCBSP_CLKGDV) return -ENODEV; mcbsp_data->clk_div = div; regs->srgr1 &= ~CLKGDV(0xff); regs->srgr1 |= CLKGDV(div - 1); return 0; } static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai); struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs; int err = 0; if (mcbsp_data->active) { if (freq == mcbsp_data->in_freq) return 0; else return -EBUSY; } /* The McBSP signal muxing functions are only available on McBSP1 */ if (clk_id == OMAP_MCBSP_CLKR_SRC_CLKR || clk_id == OMAP_MCBSP_CLKR_SRC_CLKX || clk_id == OMAP_MCBSP_FSR_SRC_FSR || clk_id == OMAP_MCBSP_FSR_SRC_FSX) if (cpu_class_is_omap1() || mcbsp_data->bus_id != 0) return -EINVAL; mcbsp_data->in_freq = freq; regs->srgr2 &= ~CLKSM; regs->pcr0 &= ~SCLKME; switch (clk_id) { case OMAP_MCBSP_SYSCLK_CLK: regs->srgr2 |= CLKSM; break; case OMAP_MCBSP_SYSCLK_CLKS_FCLK: if (cpu_class_is_omap1()) { err = -EINVAL; break; } err = omap2_mcbsp_set_clks_src(mcbsp_data->bus_id, MCBSP_CLKS_PRCM_SRC); break; case OMAP_MCBSP_SYSCLK_CLKS_EXT: if (cpu_class_is_omap1()) { err = 0; break; } err = omap2_mcbsp_set_clks_src(mcbsp_data->bus_id, MCBSP_CLKS_PAD_SRC); break; case OMAP_MCBSP_SYSCLK_CLKX_EXT: regs->srgr2 |= CLKSM; case OMAP_MCBSP_SYSCLK_CLKR_EXT: regs->pcr0 |= SCLKME; break; case OMAP_MCBSP_CLKR_SRC_CLKR: if (cpu_class_is_omap1()) break; omap2_mcbsp1_mux_clkr_src(CLKR_SRC_CLKR); break; case OMAP_MCBSP_CLKR_SRC_CLKX: if (cpu_class_is_omap1()) break; omap2_mcbsp1_mux_clkr_src(CLKR_SRC_CLKX); break; case OMAP_MCBSP_FSR_SRC_FSR: if (cpu_class_is_omap1()) break; omap2_mcbsp1_mux_fsr_src(FSR_SRC_FSR); break; case OMAP_MCBSP_FSR_SRC_FSX: if (cpu_class_is_omap1()) break; omap2_mcbsp1_mux_fsr_src(FSR_SRC_FSX); break; default: err = -ENODEV; } return err; } static const struct snd_soc_dai_ops mcbsp_dai_ops = { .startup = omap_mcbsp_dai_startup, .shutdown = omap_mcbsp_dai_shutdown, .trigger = omap_mcbsp_dai_trigger, .delay = omap_mcbsp_dai_delay, .hw_params = omap_mcbsp_dai_hw_params, .set_fmt = omap_mcbsp_dai_set_dai_fmt, .set_clkdiv = omap_mcbsp_dai_set_clkdiv, .set_sysclk = omap_mcbsp_dai_set_dai_sysclk, }; static int mcbsp_dai_probe(struct snd_soc_dai *dai) { mcbsp_data[dai->id].bus_id = dai->id; snd_soc_dai_set_drvdata(dai, &mcbsp_data[dai->id].bus_id); return 0; } static struct snd_soc_dai_driver omap_mcbsp_dai = { .probe = mcbsp_dai_probe, .playback = { .channels_min = 1, .channels_max = 16, .rates = OMAP_MCBSP_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, }, .capture = { .channels_min = 1, .channels_max = 16, .rates = OMAP_MCBSP_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, }, .ops = &mcbsp_dai_ops, }; static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; int max = mc->max; int min = mc->min; uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 1; uinfo->value.integer.min = min; uinfo->value.integer.max = max; return 0; } #define OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(id, channel) \ static int \ omap_mcbsp##id##_set_st_ch##channel##_volume(struct snd_kcontrol *kc, \ struct snd_ctl_elem_value *uc) \ { \ struct soc_mixer_control *mc = \ (struct soc_mixer_control *)kc->private_value; \ int max = mc->max; \ int min = mc->min; \ int val = uc->value.integer.value[0]; \ \ if (val < min || val > max) \ return -EINVAL; \ \ /* OMAP McBSP implementation uses index values 0..4 */ \ return omap_st_set_chgain((id)-1, channel, val); \ } #define OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(id, channel) \ static int \ omap_mcbsp##id##_get_st_ch##channel##_volume(struct snd_kcontrol *kc, \ struct snd_ctl_elem_value *uc) \ { \ s16 chgain; \ \ if (omap_st_get_chgain((id)-1, channel, &chgain)) \ return -EAGAIN; \ \ uc->value.integer.value[0] = chgain; \ return 0; \ } OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 0) OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 1) OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 0) OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 1) OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 0) OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 1) OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 0) OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 1) static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; u8 value = ucontrol->value.integer.value[0]; if (value == omap_st_is_enabled(mc->reg)) return 0; if (value) omap_st_enable(mc->reg); else omap_st_disable(mc->reg); return 1; } static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; ucontrol->value.integer.value[0] = omap_st_is_enabled(mc->reg); return 0; } static const struct snd_kcontrol_new omap_mcbsp2_st_controls[] = { SOC_SINGLE_EXT("McBSP2 Sidetone Switch", 1, 0, 1, 0, omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode), OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 0 Volume", -32768, 32767, omap_mcbsp2_get_st_ch0_volume, omap_mcbsp2_set_st_ch0_volume), OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 1 Volume", -32768, 32767, omap_mcbsp2_get_st_ch1_volume, omap_mcbsp2_set_st_ch1_volume), }; static const struct snd_kcontrol_new omap_mcbsp3_st_controls[] = { SOC_SINGLE_EXT("McBSP3 Sidetone Switch", 2, 0, 1, 0, omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode), OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 0 Volume", -32768, 32767, omap_mcbsp3_get_st_ch0_volume, omap_mcbsp3_set_st_ch0_volume), OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 1 Volume", -32768, 32767, omap_mcbsp3_get_st_ch1_volume, omap_mcbsp3_set_st_ch1_volume), }; int omap_mcbsp_st_add_controls(struct snd_soc_codec *codec, int mcbsp_id) { if (!cpu_is_omap34xx()) return -ENODEV; switch (mcbsp_id) { case 1: /* McBSP 2 */ return snd_soc_add_controls(codec, omap_mcbsp2_st_controls, ARRAY_SIZE(omap_mcbsp2_st_controls)); case 2: /* McBSP 3 */ return snd_soc_add_controls(codec, omap_mcbsp3_st_controls, ARRAY_SIZE(omap_mcbsp3_st_controls)); default: break; } return -EINVAL; } EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls); static __devinit int asoc_mcbsp_probe(struct platform_device *pdev) { return snd_soc_register_dai(&pdev->dev, &omap_mcbsp_dai); } static int __devexit asoc_mcbsp_remove(struct platform_device *pdev) { snd_soc_unregister_dai(&pdev->dev); return 0; } static struct platform_driver asoc_mcbsp_driver = { .driver = { .name = "omap-mcbsp-dai", .owner = THIS_MODULE, }, .probe = asoc_mcbsp_probe, .remove = __devexit_p(asoc_mcbsp_remove), }; module_platform_driver(asoc_mcbsp_driver); MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>"); MODULE_DESCRIPTION("OMAP I2S SoC Interface"); MODULE_LICENSE("GPL");