diff options
Diffstat (limited to 'sound/soc/sti/uniperif_player.c')
| -rw-r--r-- | sound/soc/sti/uniperif_player.c | 1110 |
1 files changed, 1110 insertions, 0 deletions
diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c new file mode 100644 index 000000000000..f6eefe1b8f8f --- /dev/null +++ b/sound/soc/sti/uniperif_player.c @@ -0,0 +1,1110 @@ +/* + * Copyright (C) STMicroelectronics SA 2015 + * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com> + * for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> + +#include <sound/asoundef.h> +#include <sound/soc.h> + +#include "uniperif.h" + +/* + * Some hardware-related definitions + */ + +/* sys config registers definitions */ +#define SYS_CFG_AUDIO_GLUE 0xA4 +#define SYS_CFG_AUDI0_GLUE_PCM_CLKX 8 + +/* + * Driver specific types. + */ +#define UNIPERIF_PLAYER_TYPE_IS_HDMI(p) \ + ((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_HDMI) +#define UNIPERIF_PLAYER_TYPE_IS_PCM(p) \ + ((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_PCM) +#define UNIPERIF_PLAYER_TYPE_IS_SPDIF(p) \ + ((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF) +#define UNIPERIF_PLAYER_TYPE_IS_IEC958(p) \ + (UNIPERIF_PLAYER_TYPE_IS_HDMI(p) || \ + UNIPERIF_PLAYER_TYPE_IS_SPDIF(p)) + +#define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999 +#define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000 + +/* + * Note: snd_pcm_hardware is linked to DMA controller but is declared here to + * integrate DAI_CPU capability in term of rate and supported channels + */ +static const struct snd_pcm_hardware uni_player_pcm_hw = { + .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID, + .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE, + + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .rate_min = 8000, + .rate_max = 192000, + + .channels_min = 2, + .channels_max = 8, + + .periods_min = 2, + .periods_max = 48, + + .period_bytes_min = 128, + .period_bytes_max = 64 * PAGE_SIZE, + .buffer_bytes_max = 256 * PAGE_SIZE +}; + +static inline int reset_player(struct uniperif *player) +{ + int count = 10; + + if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) { + while (GET_UNIPERIF_SOFT_RST_SOFT_RST(player) && count) { + udelay(5); + count--; + } + } + + if (!count) { + dev_err(player->dev, "Failed to reset uniperif"); + return -EIO; + } + + return 0; +} + +/* + * uni_player_irq_handler + * In case of error audio stream is stopped; stop action is protected via PCM + * stream lock to avoid race condition with trigger callback. + */ +static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) +{ + irqreturn_t ret = IRQ_NONE; + struct uniperif *player = dev_id; + unsigned int status; + unsigned int tmp; + + if (player->state == UNIPERIF_STATE_STOPPED) { + /* Unexpected IRQ: do nothing */ + return IRQ_NONE; + } + + /* Get interrupt status & clear them immediately */ + status = GET_UNIPERIF_ITS(player); + SET_UNIPERIF_ITS_BCLR(player, status); + + /* Check for fifo error (underrun) */ + if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(player))) { + dev_err(player->dev, "FIFO underflow error detected"); + + /* Interrupt is just for information when underflow recovery */ + if (player->info->underflow_enabled) { + /* Update state to underflow */ + player->state = UNIPERIF_STATE_UNDERFLOW; + + } else { + /* Disable interrupt so doesn't continually fire */ + SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player); + + /* Stop the player */ + snd_pcm_stream_lock(player->substream); + snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN); + snd_pcm_stream_unlock(player->substream); + } + + ret = IRQ_HANDLED; + } + + /* Check for dma error (overrun) */ + if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) { + dev_err(player->dev, "DMA error detected"); + + /* Disable interrupt so doesn't continually fire */ + SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player); + + /* Stop the player */ + snd_pcm_stream_lock(player->substream); + snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN); + snd_pcm_stream_unlock(player->substream); + + ret = IRQ_HANDLED; + } + + /* Check for underflow recovery done */ + if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) { + if (!player->info->underflow_enabled) { + dev_err(player->dev, "unexpected Underflow recovering"); + return -EPERM; + } + /* Read the underflow recovery duration */ + tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player); + + /* Clear the underflow recovery duration */ + SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player); + + /* Update state to started */ + player->state = UNIPERIF_STATE_STARTED; + + ret = IRQ_HANDLED; + } + + /* Check if underflow recovery failed */ + if (unlikely(status & + UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player))) { + dev_err(player->dev, "Underflow recovery failed"); + + /* Stop the player */ + snd_pcm_stream_lock(player->substream); + snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN); + snd_pcm_stream_unlock(player->substream); + + ret = IRQ_HANDLED; + } + + return ret; +} + +static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate) +{ + int rate_adjusted, rate_achieved, delta, ret; + int adjustment = player->clk_adj; + + /* + * a + * F = f + --------- * f = f + d + * 1000000 + * + * a + * d = --------- * f + * 1000000 + * + * where: + * f - nominal rate + * a - adjustment in ppm (parts per milion) + * F - rate to be set in synthesizer + * d - delta (difference) between f and F + */ + if (adjustment < 0) { + /* div64_64 operates on unsigned values... */ + delta = -1; + adjustment = -adjustment; + } else { + delta = 1; + } + /* 500000 ppm is 0.5, which is used to round up values */ + delta *= (int)div64_u64((uint64_t)rate * + (uint64_t)adjustment + 500000, 1000000); + rate_adjusted = rate + delta; + + /* Adjusted rate should never be == 0 */ + if (!rate_adjusted) + return -EINVAL; + + ret = clk_set_rate(player->clk, rate_adjusted); + if (ret < 0) + return ret; + + rate_achieved = clk_get_rate(player->clk); + if (!rate_achieved) + /* If value is 0 means that clock or parent not valid */ + return -EINVAL; + + /* + * Using ALSA's adjustment control, we can modify the rate to be up + * to twice as much as requested, but no more + */ + delta = rate_achieved - rate; + if (delta < 0) { + /* div64_64 operates on unsigned values... */ + delta = -delta; + adjustment = -1; + } else { + adjustment = 1; + } + /* Frequency/2 is added to round up result */ + adjustment *= (int)div64_u64((uint64_t)delta * 1000000 + rate / 2, + rate); + player->clk_adj = adjustment; + return 0; +} + +static void uni_player_set_channel_status(struct uniperif *player, + struct snd_pcm_runtime *runtime) +{ + int n; + unsigned int status; + + /* + * Some AVRs and TVs require the channel status to contain a correct + * sampling frequency. If no sample rate is already specified, then + * set one. + */ + mutex_lock(&player->ctrl_lock); + if (runtime && (player->stream_settings.iec958.status[3] + == IEC958_AES3_CON_FS_NOTID)) { + switch (runtime->rate) { + case 22050: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_22050; + break; + case 44100: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_44100; + break; + case 88200: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_88200; + break; + case 176400: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_176400; + break; + case 24000: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_24000; + break; + case 48000: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_48000; + break; + case 96000: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_96000; + break; + case 192000: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_192000; + break; + case 32000: + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_32000; + break; + default: + /* Mark as sampling frequency not indicated */ + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_NOTID; + break; + } + } + + /* Audio mode: + * Use audio mode status to select PCM or encoded mode + */ + if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO) + player->stream_settings.encoding_mode = + UNIPERIF_IEC958_ENCODING_MODE_ENCODED; + else + player->stream_settings.encoding_mode = + UNIPERIF_IEC958_ENCODING_MODE_PCM; + + if (player->stream_settings.encoding_mode == + UNIPERIF_IEC958_ENCODING_MODE_PCM) + /* Clear user validity bits */ + SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0); + else + /* Set user validity bits */ + SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1); + + /* Program the new channel status */ + for (n = 0; n < 6; ++n) { + status = + player->stream_settings.iec958.status[0 + (n * 4)] & 0xf; + status |= + player->stream_settings.iec958.status[1 + (n * 4)] << 8; + status |= + player->stream_settings.iec958.status[2 + (n * 4)] << 16; + status |= + player->stream_settings.iec958.status[3 + (n * 4)] << 24; + SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status); + } + mutex_unlock(&player->ctrl_lock); + + /* Update the channel status */ + if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) + SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player); + else + SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player); +} + +static int uni_player_prepare_iec958(struct uniperif *player, + struct snd_pcm_runtime *runtime) +{ + int clk_div; + + clk_div = player->mclk / runtime->rate; + + /* Oversampling must be multiple of 128 as iec958 frame is 32-bits */ + if ((clk_div % 128) || (clk_div <= 0)) { + dev_err(player->dev, "%s: invalid clk_div %d", + __func__, clk_div); + return -EINVAL; + } + + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S16_LE: + /* 16/16 memory format */ + SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player); + /* 16-bits per sub-frame */ + SET_UNIPERIF_I2S_FMT_NBIT_32(player); + /* Set 16-bit sample precision */ + SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player); + break; + case SNDRV_PCM_FORMAT_S32_LE: + /* 16/0 memory format */ + SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player); + /* 32-bits per sub-frame */ + SET_UNIPERIF_I2S_FMT_NBIT_32(player); + /* Set 24-bit sample precision */ + SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player); + break; + default: + dev_err(player->dev, "format not supported"); + return -EINVAL; + } + + /* Set parity to be calculated by the hardware */ + SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player); + + /* Set channel status bits to be inserted by the hardware */ + SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player); + + /* Set user data bits to be inserted by the hardware */ + SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player); + + /* Set validity bits to be inserted by the hardware */ + SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player); + + /* Set full software control to disabled */ + SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player); + + SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player); + + /* Update the channel status */ + uni_player_set_channel_status(player, runtime); + + /* Clear the user validity user bits */ + SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0); + + /* Disable one-bit audio mode */ + SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player); + + /* Enable consecutive frames repetition of Z preamble (not for HBRA) */ + SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player); + + /* Change to SUF0_SUBF1 and left/right channels swap! */ + SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player); + + /* Set data output as MSB first */ + SET_UNIPERIF_I2S_FMT_ORDER_MSB(player); + + if (player->stream_settings.encoding_mode == + UNIPERIF_IEC958_ENCODING_MODE_ENCODED) + SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player); + else + SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player); + + SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2); + + /* Set rounding to off */ + SET_UNIPERIF_CTRL_ROUNDING_OFF(player); + + /* Set clock divisor */ + SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / 128); + + /* Set the spdif latency to not wait before starting player */ + SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); + + /* + * Ensure iec958 formatting is off. It will be enabled in function + * uni_player_start() at the same time as the operation + * mode is set to work around a silicon issue. + */ + if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) + SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player); + else + SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player); + + return 0; +} + +static int uni_player_prepare_pcm(struct uniperif *player, + struct snd_pcm_runtime *runtime) +{ + int output_frame_size, slot_width, clk_div; + + /* Force slot width to 32 in I2S mode (HW constraint) */ + if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == + SND_SOC_DAIFMT_I2S) { + slot_width = 32; + } else { + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S16_LE: + slot_width = 16; + break; + default: + slot_width = 32; + break; + } + } + output_frame_size = slot_width * runtime->channels; + + clk_div = player->mclk / runtime->rate; + /* + * For 32 bits subframe clk_div must be a multiple of 128, + * for 16 bits must be a multiple of 64 + */ + if ((slot_width == 32) && (clk_div % 128)) { + dev_err(player->dev, "%s: invalid clk_div", __func__); + return -EINVAL; + } + + if ((slot_width == 16) && (clk_div % 64)) { + dev_err(player->dev, "%s: invalid clk_div", __func__); + return -EINVAL; + } + + /* + * Number of bits per subframe (which is one channel sample) + * on output - Transfer 16 or 32 bits from FIFO + */ + switch (slot_width) { + case 32: + SET_UNIPERIF_I2S_FMT_NBIT_32(player); + SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player); + break; + case 16: + SET_UNIPERIF_I2S_FMT_NBIT_16(player); + SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player); + break; + default: + dev_err(player->dev, "subframe format not supported"); + return -EINVAL; + } + + /* Configure data memory format */ + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S16_LE: + /* One data word contains two samples */ + SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player); + break; + + case SNDRV_PCM_FORMAT_S32_LE: + /* + * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits + * on the left than zeros (if less than 32 bytes)"... ;-) + */ + SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player); + break; + + default: + dev_err(player->dev, "format not supported"); + return -EINVAL; + } + + /* Set rounding to off */ + SET_UNIPERIF_CTRL_ROUNDING_OFF(player); + + /* Set clock divisor */ + SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / (2 * output_frame_size)); + + /* Number of channelsmust be even*/ + if ((runtime->channels % 2) || (runtime->channels < 2) || + (runtime->channels > 10)) { + dev_err(player->dev, "%s: invalid nb of channels", __func__); + return -EINVAL; + } + + SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2); + + /* Set 1-bit audio format to disabled */ + SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player); + + SET_UNIPERIF_I2S_FMT_ORDER_MSB(player); + SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); + + /* No iec958 formatting as outputting to DAC */ + SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player); + + return 0; +} + +/* + * ALSA uniperipheral iec958 controls + */ +static int uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; + uinfo->count = 1; + + return 0; +} + +static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958; + + mutex_lock(&player->ctrl_lock); + ucontrol->value.iec958.status[0] = iec958->status[0]; + ucontrol->value.iec958.status[1] = iec958->status[1]; + ucontrol->value.iec958.status[2] = iec958->status[2]; + ucontrol->value.iec958.status[3] = iec958->status[3]; + mutex_unlock(&player->ctrl_lock); + return 0; +} + +static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958; + + mutex_lock(&player->ctrl_lock); + iec958->status[0] = ucontrol->value.iec958.status[0]; + iec958->status[1] = ucontrol->value.iec958.status[1]; + iec958->status[2] = ucontrol->value.iec958.status[2]; + iec958->status[3] = ucontrol->value.iec958.status[3]; + mutex_unlock(&player->ctrl_lock); + + uni_player_set_channel_status(player, NULL); + + return 0; +} + +static struct snd_kcontrol_new uni_player_iec958_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), + .info = uni_player_ctl_iec958_info, + .get = uni_player_ctl_iec958_get, + .put = uni_player_ctl_iec958_put, +}; + +/* + * uniperif rate adjustement control + */ +static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN; + uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX; + uinfo->value.integer.step = 1; + + return 0; +} + +static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + + mutex_lock(&player->ctrl_lock); + ucontrol->value.integer.value[0] = player->clk_adj; + mutex_unlock(&player->ctrl_lock); + + return 0; +} + +static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + int ret = 0; + + if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) || + (ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX)) + return -EINVAL; + + mutex_lock(&player->ctrl_lock); + player->clk_adj = ucontrol->value.integer.value[0]; + + if (player->mclk) + ret = uni_player_clk_set_rate(player, player->mclk); + mutex_unlock(&player->ctrl_lock); + + return ret; +} + +static struct snd_kcontrol_new uni_player_clk_adj_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "PCM Playback Oversampling Freq. Adjustment", + .info = snd_sti_clk_adjustment_info, + .get = snd_sti_clk_adjustment_get, + .put = snd_sti_clk_adjustment_put, +}; + +static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = { + &uni_player_clk_adj_ctl, +}; + +static struct snd_kcontrol_new *snd_sti_iec_ctl[] = { + &uni_player_iec958_ctl, + &uni_player_clk_adj_ctl, +}; + +static int uni_player_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + + player->clk_adj = 0; + + return 0; +} + +static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + int ret; + + if (dir == SND_SOC_CLOCK_IN) + return 0; + + if (clk_id != 0) + return -EINVAL; + + mutex_lock(&player->ctrl_lock); + ret = uni_player_clk_set_rate(player, freq); + if (!ret) + player->mclk = freq; + mutex_unlock(&player->ctrl_lock); + + return ret; +} + +static int uni_player_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + struct snd_pcm_runtime *runtime = substream->runtime; + int transfer_size, trigger_limit; + int ret; + + /* The player should be stopped */ + if (player->state != UNIPERIF_STATE_STOPPED) { + dev_err(player->dev, "%s: invalid player state %d", __func__, + player->state); + return -EINVAL; + } + + /* Calculate transfer size (in fifo cells and bytes) for frame count */ + transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES; + + /* Calculate number of empty cells available before asserting DREQ */ + if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) { + trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size; + } else { + /* + * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0 + * FDMA_TRIGGER_LIMIT also controls when the state switches + * from OFF or STANDBY to AUDIO DATA. + */ + trigger_limit = transfer_size; + } + + /* Trigger limit must be an even number */ + if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) || + (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) { + dev_err(player->dev, "invalid trigger limit %d", trigger_limit); + return -EINVAL; + } + + SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit); + + /* Uniperipheral setup depends on player type */ + switch (player->info->player_type) { + case SND_ST_UNIPERIF_PLAYER_TYPE_HDMI: + ret = uni_player_prepare_iec958(player, runtime); + break; + case SND_ST_UNIPERIF_PLAYER_TYPE_PCM: + ret = uni_player_prepare_pcm(player, runtime); + break; + case SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF: + ret = uni_player_prepare_iec958(player, runtime); + break; + default: + dev_err(player->dev, "invalid player type"); + return -EINVAL; + } + + if (ret) + return ret; + + switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player); + SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player); + break; + case SND_SOC_DAIFMT_NB_IF: + SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player); + SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player); + break; + case SND_SOC_DAIFMT_IB_NF: + SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player); + SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); + break; + case SND_SOC_DAIFMT_IB_IF: + SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player); + SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); + break; + } + + switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); + SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player); + break; + case SND_SOC_DAIFMT_LEFT_J: + SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); + SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player); + break; + case SND_SOC_DAIFMT_RIGHT_J: + SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player); + SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player); + break; + default: + dev_err(player->dev, "format not supported"); + return -EINVAL; + } + + SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0); + + /* Reset uniperipheral player */ + SET_UNIPERIF_SOFT_RST_SOFT_RST(player); + + return reset_player(player); +} + +static int uni_player_start(struct uniperif *player) +{ + int ret; + + /* The player should be stopped */ + if (player->state != UNIPERIF_STATE_STOPPED) { + dev_err(player->dev, "%s: invalid player state", __func__); + return -EINVAL; + } + + ret = clk_prepare_enable(player->clk); + if (ret) { + dev_err(player->dev, "%s: Failed to enable clock", __func__); + return ret; + } + + /* Clear any pending interrupts */ + SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player)); + + /* Set the interrupt mask */ + SET_UNIPERIF_ITM_BSET_DMA_ERROR(player); + SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player); + + /* Enable underflow recovery interrupts */ + if (player->info->underflow_enabled) { + SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player); + SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player); + } + + /* Reset uniperipheral player */ + SET_UNIPERIF_SOFT_RST_SOFT_RST(player); + + ret = reset_player(player); + if (ret < 0) + return ret; + + /* + * Does not use IEC61937 features of the uniperipheral hardware. + * Instead it performs IEC61937 in software and inserts it directly + * into the audio data stream. As such, when encoded mode is selected, + * linear pcm mode is still used, but with the differences of the + * channel status bits set for encoded mode and the validity bits set. + */ + SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player); + + /* + * If iec958 formatting is required for hdmi or spdif, then it must be + * enabled after the operation mode is set. If set prior to this, it + * will not take affect and hang the player. + */ + if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) + if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player)) + SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player); + + /* Force channel status update (no update if clk disable) */ + if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) + SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player); + else + SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player); + + /* Update state to started */ + player->state = UNIPERIF_STATE_STARTED; + + return 0; +} + +static int uni_player_stop(struct uniperif *player) +{ + int ret; + + /* The player should not be in stopped state */ + if (player->state == UNIPERIF_STATE_STOPPED) { + dev_err(player->dev, "%s: invalid player state", __func__); + return -EINVAL; + } + + /* Turn the player off */ + SET_UNIPERIF_CTRL_OPERATION_OFF(player); + + /* Soft reset the player */ + SET_UNIPERIF_SOFT_RST_SOFT_RST(player); + + ret = reset_player(player); + if (ret < 0) + return ret; + + /* Disable interrupts */ + SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player)); + + /* Disable clock */ + clk_disable_unprepare(player->clk); + + /* Update state to stopped and return */ + player->state = UNIPERIF_STATE_STOPPED; + + return 0; +} + +int uni_player_resume(struct uniperif *player) +{ + int ret; + + /* Select the frequency synthesizer clock */ + if (player->clk_sel) { + ret = regmap_field_write(player->clk_sel, 1); + if (ret) { + dev_err(player->dev, + "%s: Failed to select freq synth clock", + __func__); + return ret; + } + } + + SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); + SET_UNIPERIF_CTRL_ROUNDING_OFF(player); + SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); + SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player); + + return 0; +} +EXPORT_SYMBOL_GPL(uni_player_resume); + +static int uni_player_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + return uni_player_start(player); + case SNDRV_PCM_TRIGGER_STOP: + return uni_player_stop(player); + case SNDRV_PCM_TRIGGER_RESUME: + return uni_player_resume(player); + default: + return -EINVAL; + } +} + +static void uni_player_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); + struct uniperif *player = priv->dai_data.uni; + + if (player->state != UNIPERIF_STATE_STOPPED) + /* Stop the player */ + uni_player_stop(player); +} + +static int uni_player_parse_dt_clk_glue(struct platform_device *pdev, + struct uniperif *player) +{ + int bit_offset; + struct device_node *node = pdev->dev.of_node; + struct regmap *regmap; + + bit_offset = SYS_CFG_AUDI0_GLUE_PCM_CLKX + player->info->id; + + regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg"); + + if (regmap) { + struct reg_field regfield = + REG_FIELD(SYS_CFG_AUDIO_GLUE, bit_offset, bit_offset); + + player->clk_sel = regmap_field_alloc(regmap, regfield); + } else { + dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n"); + return -EINVAL; + } + + return 0; +} + +static int uni_player_parse_dt(struct platform_device *pdev, + struct uniperif *player) +{ + struct uniperif_info *info; + struct device *dev = &pdev->dev; + struct device_node *pnode = pdev->dev.of_node; + const char *mode; + + /* Allocate memory for the info structure */ + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + of_property_read_u32(pnode, "version", &player->ver); + if (player->ver == SND_ST_UNIPERIF_VERSION_UNKNOWN) { + dev_err(dev, "Unknown uniperipheral version "); + return -EINVAL; + } + /* Underflow recovery is only supported on later ip revisions */ + if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) + info->underflow_enabled = 1; + + of_property_read_u32(pnode, "uniperiph-id", &info->id); + + /* Read the device mode property */ + of_property_read_string(pnode, "mode", &mode); + + if (strcasecmp(mode, "hdmi") == 0) + info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_HDMI; + else if (strcasecmp(mode, "pcm") == 0) + info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_PCM; + else if (strcasecmp(mode, "spdif") == 0) + info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF; + else + info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_NONE; + + /* Save the info structure */ + player->info = info; + + /* Get the PCM_CLK_SEL bit from audio-glue-ctrl SoC register */ + if (uni_player_parse_dt_clk_glue(pdev, player)) + return -EINVAL; + + return 0; +} + +static const struct snd_soc_dai_ops uni_player_dai_ops = { + .startup = uni_player_startup, + .shutdown = uni_player_shutdown, + .prepare = uni_player_prepare, + .trigger = uni_player_trigger, + .hw_params = sti_uniperiph_dai_hw_params, + .set_fmt = sti_uniperiph_dai_set_fmt, + .set_sysclk = uni_player_set_sysclk +}; + +int uni_player_init(struct platform_device *pdev, + struct uniperif *player) +{ + int ret = 0; + + player->dev = &pdev->dev; + player->state = UNIPERIF_STATE_STOPPED; + player->hw = &uni_player_pcm_hw; + player->dai_ops = &uni_player_dai_ops; + + ret = uni_player_parse_dt(pdev, player); + + if (ret < 0) { + dev_err(player->dev, "Failed to parse DeviceTree"); + return ret; + } + + /* Get uniperif resource */ + player->clk = of_clk_get(pdev->dev.of_node, 0); + if (IS_ERR(player->clk)) + ret = PTR_ERR(player->clk); + + /* Select the frequency synthesizer clock */ + if (player->clk_sel) { + ret = regmap_field_write(player->clk_sel, 1); + if (ret) { + dev_err(player->dev, + "%s: Failed to select freq synth clock", + __func__); + return ret; + } + } + + ret = devm_request_irq(&pdev->dev, player->irq, + uni_player_irq_handler, IRQF_SHARED, + dev_name(&pdev->dev), player); + if (ret < 0) + return ret; + + mutex_init(&player->ctrl_lock); + + /* Ensure that disabled by default */ + SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); + SET_UNIPERIF_CTRL_ROUNDING_OFF(player); + SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); + SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player); + + if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player)) { + /* Set default iec958 status bits */ + + /* Consumer, PCM, copyright, 2ch, mode 0 */ + player->stream_settings.iec958.status[0] = 0x00; + /* Broadcast reception category */ + player->stream_settings.iec958.status[1] = + IEC958_AES1_CON_GENERAL; + /* Do not take into account source or channel number */ + player->stream_settings.iec958.status[2] = + IEC958_AES2_CON_SOURCE_UNSPEC; + /* Sampling frequency not indicated */ + player->stream_settings.iec958.status[3] = + IEC958_AES3_CON_FS_NOTID; + /* Max sample word 24-bit, sample word length not indicated */ + player->stream_settings.iec958.status[4] = + IEC958_AES4_CON_MAX_WORDLEN_24 | + IEC958_AES4_CON_WORDLEN_24_20; + + player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl); + player->snd_ctrls = snd_sti_iec_ctl[0]; + } else { + player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl); + player->snd_ctrls = snd_sti_pcm_ctl[0]; + } + + return 0; +} +EXPORT_SYMBOL_GPL(uni_player_init); |