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Diffstat (limited to 'sound/x86/intel_hdmi_audio.c')
| -rw-r--r-- | sound/x86/intel_hdmi_audio.c | 1870 |
1 files changed, 1870 insertions, 0 deletions
diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c new file mode 100644 index 000000000000..f30155446117 --- /dev/null +++ b/sound/x86/intel_hdmi_audio.c @@ -0,0 +1,1870 @@ +/* + * intel_hdmi_audio.c - Intel HDMI audio driver + * + * Copyright (C) 2016 Intel Corp + * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com> + * Ramesh Babu K V <ramesh.babu@intel.com> + * Vaibhav Agarwal <vaibhav.agarwal@intel.com> + * Jerome Anand <jerome.anand@intel.com> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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; version 2 of the License. + * + * 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. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * ALSA driver for Intel HDMI audio + */ + +#define pr_fmt(fmt) "had: " fmt + +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/acpi.h> +#include <asm/cacheflush.h> +#include <sound/pcm.h> +#include <sound/core.h> +#include <sound/pcm_params.h> +#include <sound/initval.h> +#include <sound/control.h> +#include <sound/initval.h> +#include "intel_hdmi_audio.h" + +static DEFINE_MUTEX(had_mutex); + +/*standard module options for ALSA. This module supports only one card*/ +static int hdmi_card_index = SNDRV_DEFAULT_IDX1; +static char *hdmi_card_id = SNDRV_DEFAULT_STR1; +static struct snd_intelhad *had_data; +static int underrun_count; + +module_param_named(index, hdmi_card_index, int, 0444); +MODULE_PARM_DESC(index, + "Index value for INTEL Intel HDMI Audio controller."); +module_param_named(id, hdmi_card_id, charp, 0444); +MODULE_PARM_DESC(id, + "ID string for INTEL Intel HDMI Audio controller."); + +/* + * ELD SA bits in the CEA Speaker Allocation data block + */ +static int eld_speaker_allocation_bits[] = { + [0] = FL | FR, + [1] = LFE, + [2] = FC, + [3] = RL | RR, + [4] = RC, + [5] = FLC | FRC, + [6] = RLC | RRC, + /* the following are not defined in ELD yet */ + [7] = 0, +}; + +/* + * This is an ordered list! + * + * The preceding ones have better chances to be selected by + * hdmi_channel_allocation(). + */ +static struct cea_channel_speaker_allocation channel_allocations[] = { +/* channel: 7 6 5 4 3 2 1 0 */ +{ .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } }, + /* 2.1 */ +{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } }, + /* Dolby Surround */ +{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } }, + /* surround40 */ +{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } }, + /* surround41 */ +{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } }, + /* surround50 */ +{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } }, + /* surround51 */ +{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } }, + /* 6.1 */ +{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } }, + /* surround71 */ +{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } }, + +{ .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } }, +{ .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } }, +{ .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } }, +{ .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } }, +{ .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } }, +{ .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } }, +{ .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } }, +{ .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } }, +{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } }, +{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } }, +{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } }, +{ .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } }, +{ .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } }, +{ .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } }, +{ .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } }, +{ .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } }, +{ .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } }, +{ .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } }, +{ .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } }, +{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } }, +{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } }, +{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } }, +{ .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } }, +}; + +static struct channel_map_table map_tables[] = { + { SNDRV_CHMAP_FL, 0x00, FL }, + { SNDRV_CHMAP_FR, 0x01, FR }, + { SNDRV_CHMAP_RL, 0x04, RL }, + { SNDRV_CHMAP_RR, 0x05, RR }, + { SNDRV_CHMAP_LFE, 0x02, LFE }, + { SNDRV_CHMAP_FC, 0x03, FC }, + { SNDRV_CHMAP_RLC, 0x06, RLC }, + { SNDRV_CHMAP_RRC, 0x07, RRC }, + {} /* terminator */ +}; + +/* hardware capability structure */ +static const struct snd_pcm_hardware snd_intel_hadstream = { + .info = (SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_DOUBLE | + SNDRV_PCM_INFO_MMAP| + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_BATCH), + .formats = (SNDRV_PCM_FMTBIT_S24 | + SNDRV_PCM_FMTBIT_U24), + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000 | + SNDRV_PCM_RATE_176400 | + SNDRV_PCM_RATE_192000, + .rate_min = HAD_MIN_RATE, + .rate_max = HAD_MAX_RATE, + .channels_min = HAD_MIN_CHANNEL, + .channels_max = HAD_MAX_CHANNEL, + .buffer_bytes_max = HAD_MAX_BUFFER, + .period_bytes_min = HAD_MIN_PERIOD_BYTES, + .period_bytes_max = HAD_MAX_PERIOD_BYTES, + .periods_min = HAD_MIN_PERIODS, + .periods_max = HAD_MAX_PERIODS, + .fifo_size = HAD_FIFO_SIZE, +}; + +/* Register access functions */ + +int had_get_hwstate(struct snd_intelhad *intelhaddata) +{ + /* Check for device presence -SW state */ + if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) { + pr_debug("%s:Device not connected:%d\n", __func__, + intelhaddata->drv_status); + return -ENODEV; + } + + return 0; +} + +int had_get_caps(enum had_caps_list query, void *caps) +{ + int retval; + struct snd_intelhad *intelhaddata = had_data; + + retval = had_get_hwstate(intelhaddata); + if (!retval) + retval = intelhaddata->query_ops.hdmi_audio_get_caps(query, + caps); + + return retval; +} + +int had_set_caps(enum had_caps_list set_element, void *caps) +{ + int retval; + struct snd_intelhad *intelhaddata = had_data; + + retval = had_get_hwstate(intelhaddata); + if (!retval) + retval = intelhaddata->query_ops.hdmi_audio_set_caps( + set_element, caps); + + return retval; +} + +int had_read_register(u32 offset, u32 *data) +{ + int retval; + struct snd_intelhad *intelhaddata = had_data; + + retval = had_get_hwstate(intelhaddata); + if (!retval) + retval = intelhaddata->reg_ops.hdmi_audio_read_register( + offset + intelhaddata->audio_cfg_offset, data); + + return retval; +} + +int had_write_register(u32 offset, u32 data) +{ + int retval; + struct snd_intelhad *intelhaddata = had_data; + + retval = had_get_hwstate(intelhaddata); + if (!retval) + retval = intelhaddata->reg_ops.hdmi_audio_write_register( + offset + intelhaddata->audio_cfg_offset, data); + + return retval; +} + +int had_read_modify(u32 offset, u32 data, u32 mask) +{ + int retval; + struct snd_intelhad *intelhaddata = had_data; + + retval = had_get_hwstate(intelhaddata); + if (!retval) + retval = intelhaddata->reg_ops.hdmi_audio_read_modify( + offset + intelhaddata->audio_cfg_offset, + data, mask); + + return retval; +} +/** + * function to read-modify + * AUD_CONFIG register on VLV2.The had_read_modify() function should not + * directly be used on VLV2 for updating AUD_CONFIG register. + * This is because: + * Bit6 of AUD_CONFIG register is writeonly due to a silicon bug on VLV2 + * HDMI IP. As a result a read-modify of AUD_CONFIG regiter will always + * clear bit6. AUD_CONFIG[6:4] represents the "channels" field of the + * register. This field should be 1xy binary for configuration with 6 or + * more channels. Read-modify of AUD_CONFIG (Eg. for enabling audio) + * causes the "channels" field to be updated as 0xy binary resulting in + * bad audio. The fix is to always write the AUD_CONFIG[6:4] with + * appropriate value when doing read-modify of AUD_CONFIG register. + * + * @substream: the current substream or NULL if no active substream + * @data : data to be written + * @mask : mask + * + */ +static int had_read_modify_aud_config_v2(struct snd_pcm_substream *substream, + u32 data, u32 mask) +{ + union aud_cfg cfg_val = {.cfg_regval = 0}; + u8 channels; + + /* + * If substream is NULL, there is no active stream. + * In this case just set channels to 2 + */ + if (substream) + channels = substream->runtime->channels; + else + channels = 2; + cfg_val.cfg_regx_v2.num_ch = channels - 2; + + data = data | cfg_val.cfg_regval; + mask = mask | AUD_CONFIG_CH_MASK_V2; + + pr_debug("%s : data = %x, mask =%x\n", __func__, data, mask); + + return had_read_modify(AUD_CONFIG, data, mask); +} + +static void snd_intelhad_enable_audio_v1(struct snd_pcm_substream *substream, + u8 enable) +{ + had_read_modify(AUD_CONFIG, enable, BIT(0)); +} + +static void snd_intelhad_enable_audio_v2(struct snd_pcm_substream *substream, + u8 enable) +{ + had_read_modify_aud_config_v2(substream, enable, BIT(0)); +} + +static void snd_intelhad_reset_audio_v1(u8 reset) +{ + had_write_register(AUD_HDMI_STATUS, reset); +} + +static void snd_intelhad_reset_audio_v2(u8 reset) +{ + had_write_register(AUD_HDMI_STATUS_v2, reset); +} + +/** + * initialize audio channel status registers + * This function is called in the prepare callback + */ +static int had_prog_status_reg(struct snd_pcm_substream *substream, + struct snd_intelhad *intelhaddata) +{ + union aud_cfg cfg_val = {.cfg_regval = 0}; + union aud_ch_status_0 ch_stat0 = {.status_0_regval = 0}; + union aud_ch_status_1 ch_stat1 = {.status_1_regval = 0}; + int format; + + pr_debug("Entry %s\n", __func__); + + ch_stat0.status_0_regx.lpcm_id = (intelhaddata->aes_bits & + IEC958_AES0_NONAUDIO)>>1; + ch_stat0.status_0_regx.clk_acc = (intelhaddata->aes_bits & + IEC958_AES3_CON_CLOCK)>>4; + cfg_val.cfg_regx.val_bit = ch_stat0.status_0_regx.lpcm_id; + + switch (substream->runtime->rate) { + case AUD_SAMPLE_RATE_32: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_32KHZ; + break; + + case AUD_SAMPLE_RATE_44_1: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_44KHZ; + break; + case AUD_SAMPLE_RATE_48: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_48KHZ; + break; + case AUD_SAMPLE_RATE_88_2: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_88KHZ; + break; + case AUD_SAMPLE_RATE_96: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_96KHZ; + break; + case AUD_SAMPLE_RATE_176_4: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_176KHZ; + break; + case AUD_SAMPLE_RATE_192: + ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_192KHZ; + break; + + default: + /* control should never come here */ + return -EINVAL; + break; + + } + had_write_register(AUD_CH_STATUS_0, ch_stat0.status_0_regval); + + format = substream->runtime->format; + + if (format == SNDRV_PCM_FORMAT_S16_LE) { + ch_stat1.status_1_regx.max_wrd_len = MAX_SMPL_WIDTH_20; + ch_stat1.status_1_regx.wrd_len = SMPL_WIDTH_16BITS; + } else if (format == SNDRV_PCM_FORMAT_S24_LE) { + ch_stat1.status_1_regx.max_wrd_len = MAX_SMPL_WIDTH_24; + ch_stat1.status_1_regx.wrd_len = SMPL_WIDTH_24BITS; + } else { + ch_stat1.status_1_regx.max_wrd_len = 0; + ch_stat1.status_1_regx.wrd_len = 0; + } + had_write_register(AUD_CH_STATUS_1, ch_stat1.status_1_regval); + return 0; +} + +/** + * function to initialize audio + * registers and buffer confgiuration registers + * This function is called in the prepare callback + */ +static int snd_intelhad_prog_audio_ctrl_v2(struct snd_pcm_substream *substream, + struct snd_intelhad *intelhaddata) +{ + union aud_cfg cfg_val = {.cfg_regval = 0}; + union aud_buf_config buf_cfg = {.buf_cfgval = 0}; + u8 channels; + + had_prog_status_reg(substream, intelhaddata); + + buf_cfg.buf_cfg_regx_v2.audio_fifo_watermark = FIFO_THRESHOLD; + buf_cfg.buf_cfg_regx_v2.dma_fifo_watermark = DMA_FIFO_THRESHOLD; + buf_cfg.buf_cfg_regx_v2.aud_delay = 0; + had_write_register(AUD_BUF_CONFIG, buf_cfg.buf_cfgval); + + channels = substream->runtime->channels; + cfg_val.cfg_regx_v2.num_ch = channels - 2; + if (channels <= 2) + cfg_val.cfg_regx_v2.layout = LAYOUT0; + else + cfg_val.cfg_regx_v2.layout = LAYOUT1; + + had_write_register(AUD_CONFIG, cfg_val.cfg_regval); + return 0; +} + +/** + * function to initialize audio + * registers and buffer confgiuration registers + * This function is called in the prepare callback + */ +static int snd_intelhad_prog_audio_ctrl_v1(struct snd_pcm_substream *substream, + struct snd_intelhad *intelhaddata) +{ + union aud_cfg cfg_val = {.cfg_regval = 0}; + union aud_buf_config buf_cfg = {.buf_cfgval = 0}; + u8 channels; + + had_prog_status_reg(substream, intelhaddata); + + buf_cfg.buf_cfg_regx.fifo_width = FIFO_THRESHOLD; + buf_cfg.buf_cfg_regx.aud_delay = 0; + had_write_register(AUD_BUF_CONFIG, buf_cfg.buf_cfgval); + + channels = substream->runtime->channels; + + switch (channels) { + case 1: + case 2: + cfg_val.cfg_regx.num_ch = CH_STEREO; + cfg_val.cfg_regx.layout = LAYOUT0; + break; + + case 3: + case 4: + cfg_val.cfg_regx.num_ch = CH_THREE_FOUR; + cfg_val.cfg_regx.layout = LAYOUT1; + break; + + case 5: + case 6: + cfg_val.cfg_regx.num_ch = CH_FIVE_SIX; + cfg_val.cfg_regx.layout = LAYOUT1; + break; + + case 7: + case 8: + cfg_val.cfg_regx.num_ch = CH_SEVEN_EIGHT; + cfg_val.cfg_regx.layout = LAYOUT1; + break; + + } + + had_write_register(AUD_CONFIG, cfg_val.cfg_regval); + return 0; +} + +/* + * Compute derived values in channel_allocations[]. + */ +static void init_channel_allocations(void) +{ + int i, j; + struct cea_channel_speaker_allocation *p; + + pr_debug("%s: Enter\n", __func__); + + for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { + p = channel_allocations + i; + p->channels = 0; + p->spk_mask = 0; + for (j = 0; j < ARRAY_SIZE(p->speakers); j++) + if (p->speakers[j]) { + p->channels++; + p->spk_mask |= p->speakers[j]; + } + } +} + +/* + * The transformation takes two steps: + * + * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask + * spk_mask => (channel_allocations[]) => ai->CA + * + * TODO: it could select the wrong CA from multiple candidates. + */ +static int snd_intelhad_channel_allocation(struct snd_intelhad *intelhaddata, + int channels) +{ + int i; + int ca = 0; + int spk_mask = 0; + + /* + * CA defaults to 0 for basic stereo audio + */ + if (channels <= 2) + return 0; + + /* + * expand ELD's speaker allocation mask + * + * ELD tells the speaker mask in a compact(paired) form, + * expand ELD's notions to match the ones used by Audio InfoFrame. + */ + + for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { + if (intelhaddata->eeld.speaker_allocation_block & (1 << i)) + spk_mask |= eld_speaker_allocation_bits[i]; + } + + /* search for the first working match in the CA table */ + for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { + if (channels == channel_allocations[i].channels && + (spk_mask & channel_allocations[i].spk_mask) == + channel_allocations[i].spk_mask) { + ca = channel_allocations[i].ca_index; + break; + } + } + + pr_debug("HDMI: select CA 0x%x for %d\n", ca, channels); + + return ca; +} + +/* from speaker bit mask to ALSA API channel position */ +static int spk_to_chmap(int spk) +{ + struct channel_map_table *t = map_tables; + + for (; t->map; t++) { + if (t->spk_mask == spk) + return t->map; + } + return 0; +} + +void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata) +{ + int i = 0, c = 0; + int spk_mask = 0; + struct snd_pcm_chmap_elem *chmap; + u8 eld_high, eld_high_mask = 0xF0; + u8 high_msb; + + chmap = kzalloc(sizeof(*chmap), GFP_KERNEL); + if (chmap == NULL) { + intelhaddata->chmap->chmap = NULL; + return; + } + + had_get_caps(HAD_GET_ELD, &intelhaddata->eeld); + + pr_debug("eeld.speaker_allocation_block = %x\n", + intelhaddata->eeld.speaker_allocation_block); + + /* WA: Fix the max channel supported to 8 */ + + /* + * Sink may support more than 8 channels, if eld_high has more than + * one bit set. SOC supports max 8 channels. + * Refer eld_speaker_allocation_bits, for sink speaker allocation + */ + + /* if 0x2F < eld < 0x4F fall back to 0x2f, else fall back to 0x4F */ + eld_high = intelhaddata->eeld.speaker_allocation_block & eld_high_mask; + if ((eld_high & (eld_high-1)) && (eld_high > 0x1F)) { + /* eld_high & (eld_high-1): if more than 1 bit set */ + /* 0x1F: 7 channels */ + for (i = 1; i < 4; i++) { + high_msb = eld_high & (0x80 >> i); + if (high_msb) { + intelhaddata->eeld.speaker_allocation_block &= + high_msb | 0xF; + break; + } + } + } + + for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { + if (intelhaddata->eeld.speaker_allocation_block & (1 << i)) + spk_mask |= eld_speaker_allocation_bits[i]; + } + + for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { + if (spk_mask == channel_allocations[i].spk_mask) { + for (c = 0; c < channel_allocations[i].channels; c++) { + chmap->map[c] = spk_to_chmap( + channel_allocations[i].speakers[ + (MAX_SPEAKERS - 1)-c]); + } + chmap->channels = channel_allocations[i].channels; + intelhaddata->chmap->chmap = chmap; + break; + } + } + if (i >= ARRAY_SIZE(channel_allocations)) { + intelhaddata->chmap->chmap = NULL; + kfree(chmap); + } +} + +/* + * ALSA API channel-map control callbacks + */ +static int had_chmap_ctl_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); + struct snd_intelhad *intelhaddata = info->private_data; + + if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) + return -ENODEV; + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = HAD_MAX_CHANNEL; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = SNDRV_CHMAP_LAST; + return 0; +} + +static int had_chmap_ctl_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); + struct snd_intelhad *intelhaddata = info->private_data; + int i = 0; + const struct snd_pcm_chmap_elem *chmap; + + if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) + return -ENODEV; + if (intelhaddata->chmap->chmap == NULL) + return -ENODATA; + chmap = intelhaddata->chmap->chmap; + for (i = 0; i < chmap->channels; i++) { + ucontrol->value.integer.value[i] = chmap->map[i]; + pr_debug("chmap->map[%d] = %d\n", i, chmap->map[i]); + } + + return 0; +} + +static int had_register_chmap_ctls(struct snd_intelhad *intelhaddata, + struct snd_pcm *pcm) +{ + int err = 0; + + err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, + NULL, 0, (unsigned long)intelhaddata, + &intelhaddata->chmap); + if (err < 0) + return err; + + intelhaddata->chmap->private_data = intelhaddata; + intelhaddata->kctl = intelhaddata->chmap->kctl; + intelhaddata->kctl->info = had_chmap_ctl_info; + intelhaddata->kctl->get = had_chmap_ctl_get; + intelhaddata->chmap->chmap = NULL; + return 0; +} + +/** + * snd_intelhad_prog_dip_v1 - to initialize Data Island Packets registers + * + * @substream:substream for which the prepare function is called + * @intelhaddata:substream private data + * + * This function is called in the prepare callback + */ +static void snd_intelhad_prog_dip_v1(struct snd_pcm_substream *substream, + struct snd_intelhad *intelhaddata) +{ + int i; + union aud_ctrl_st ctrl_state = {.ctrl_val = 0}; + union aud_info_frame2 frame2 = {.fr2_val = 0}; + union aud_info_frame3 frame3 = {.fr3_val = 0}; + u8 checksum = 0; + int channels; + + channels = substream->runtime->channels; + + had_write_register(AUD_CNTL_ST, ctrl_state.ctrl_val); + + frame2.fr2_regx.chnl_cnt = substream->runtime->channels - 1; + + frame3.fr3_regx.chnl_alloc = snd_intelhad_channel_allocation( + intelhaddata, channels); + + /*Calculte the byte wide checksum for all valid DIP words*/ + for (i = 0; i < BYTES_PER_WORD; i++) + checksum += (INFO_FRAME_WORD1 >> i*BITS_PER_BYTE) & MASK_BYTE0; + for (i = 0; i < BYTES_PER_WORD; i++) + checksum += (frame2.fr2_val >> i*BITS_PER_BYTE) & MASK_BYTE0; + for (i = 0; i < BYTES_PER_WORD; i++) + checksum += (frame3.fr3_val >> i*BITS_PER_BYTE) & MASK_BYTE0; + + frame2.fr2_regx.chksum = -(checksum); + + had_write_register(AUD_HDMIW_INFOFR, INFO_FRAME_WORD1); + had_write_register(AUD_HDMIW_INFOFR, frame2.fr2_val); + had_write_register(AUD_HDMIW_INFOFR, frame3.fr3_val); + + /* program remaining DIP words with zero */ + for (i = 0; i < HAD_MAX_DIP_WORDS-VALID_DIP_WORDS; i++) + had_write_register(AUD_HDMIW_INFOFR, 0x0); + + ctrl_state.ctrl_regx.dip_freq = 1; + ctrl_state.ctrl_regx.dip_en_sta = 1; + had_write_register(AUD_CNTL_ST, ctrl_state.ctrl_val); +} + +/** + * snd_intelhad_prog_dip_v2 - to initialize Data Island Packets registers + * + * @substream:substream for which the prepare function is called + * @intelhaddata:substream private data + * + * This function is called in the prepare callback + */ +static void snd_intelhad_prog_dip_v2(struct snd_pcm_substream *substream, + struct snd_intelhad *intelhaddata) +{ + int i; + union aud_ctrl_st ctrl_state = {.ctrl_val = 0}; + union aud_info_frame2 frame2 = {.fr2_val = 0}; + union aud_info_frame3 frame3 = {.fr3_val = 0}; + u8 checksum = 0; + int channels; + + channels = substream->runtime->channels; + + had_write_register(AUD_CNTL_ST, ctrl_state.ctrl_val); + + frame2.fr2_regx.chnl_cnt = substream->runtime->channels - 1; + + frame3.fr3_regx.chnl_alloc = snd_intelhad_channel_allocation( + intelhaddata, channels); + + /*Calculte the byte wide checksum for all valid DIP words*/ + for (i = 0; i < BYTES_PER_WORD; i++) + checksum += (INFO_FRAME_WORD1 >> i*BITS_PER_BYTE) & MASK_BYTE0; + for (i = 0; i < BYTES_PER_WORD; i++) + checksum += (frame2.fr2_val >> i*BITS_PER_BYTE) & MASK_BYTE0; + for (i = 0; i < BYTES_PER_WORD; i++) + checksum += (frame3.fr3_val >> i*BITS_PER_BYTE) & MASK_BYTE0; + + frame2.fr2_regx.chksum = -(checksum); + + had_write_register(AUD_HDMIW_INFOFR_v2, INFO_FRAME_WORD1); + had_write_register(AUD_HDMIW_INFOFR_v2, frame2.fr2_val); + had_write_register(AUD_HDMIW_INFOFR_v2, frame3.fr3_val); + + /* program remaining DIP words with zero */ + for (i = 0; i < HAD_MAX_DIP_WORDS-VALID_DIP_WORDS; i++) + had_write_register(AUD_HDMIW_INFOFR_v2, 0x0); + + ctrl_state.ctrl_regx.dip_freq = 1; + ctrl_state.ctrl_regx.dip_en_sta = 1; + had_write_register(AUD_CNTL_ST, ctrl_state.ctrl_val); +} + +/** + * snd_intelhad_prog_buffer - programs buffer + * address and length registers + * + * @substream:substream for which the prepare function is called + * @intelhaddata:substream private data + * + * This function programs ring buffer address and length into registers. + */ +int snd_intelhad_prog_buffer(struct snd_intelhad *intelhaddata, + int start, int end) +{ + u32 ring_buf_addr, ring_buf_size, period_bytes; + u8 i, num_periods; + struct snd_pcm_substream *substream; + + substream = intelhaddata->stream_info.had_substream; + if (!substream) { + pr_err("substream is NULL\n"); + dump_stack(); + return 0; + } + + ring_buf_addr = substream->runtime->dma_addr; + ring_buf_size = snd_pcm_lib_buffer_bytes(substream); + intelhaddata->stream_info.ring_buf_size = ring_buf_size; + period_bytes = frames_to_bytes(substream->runtime, + substream->runtime->period_size); + num_periods = substream->runtime->periods; + + /* + * buffer addr should be 64 byte aligned, period bytes + * will be used to calculate addr offset + */ + period_bytes &= ~0x3F; + + /* Hardware supports MAX_PERIODS buffers */ + if (end >= HAD_MAX_PERIODS) + return -EINVAL; + + for (i = start; i <= end; i++) { + /* Program the buf registers with addr and len */ + intelhaddata->buf_info[i].buf_addr = ring_buf_addr + + (i * period_bytes); + if (i < num_periods-1) + intelhaddata->buf_info[i].buf_size = period_bytes; + else + intelhaddata->buf_info[i].buf_size = ring_buf_size - + (period_bytes*i); + + had_write_register(AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH), + intelhaddata->buf_info[i].buf_addr | + BIT(0) | BIT(1)); + had_write_register(AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH), + period_bytes); + intelhaddata->buf_info[i].is_valid = true; + } + pr_debug("%s:buf[%d-%d] addr=%#x and size=%d\n", __func__, start, end, + intelhaddata->buf_info[start].buf_addr, + intelhaddata->buf_info[start].buf_size); + intelhaddata->valid_buf_cnt = num_periods; + return 0; +} + +int snd_intelhad_read_len(struct snd_intelhad *intelhaddata) +{ + int i, retval = 0; + u32 len[4]; + + for (i = 0; i < 4 ; i++) { + had_read_register(AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH), + &len[i]); + if (!len[i]) + retval++; + } + if (retval != 1) { + for (i = 0; i < 4 ; i++) + pr_debug("buf[%d] size=%d\n", i, len[i]); + } + + return retval; +} + +/** + * snd_intelhad_prog_cts_v1 - Program HDMI audio CTS value + * + * @aud_samp_freq: sampling frequency of audio data + * @tmds: sampling frequency of the display data + * @n_param: N value, depends on aud_samp_freq + * @intelhaddata:substream private data + * + * Program CTS register based on the audio and display sampling frequency + */ +static void snd_intelhad_prog_cts_v1(u32 aud_samp_freq, u32 tmds, u32 n_param, + struct snd_intelhad *intelhaddata) +{ + u32 cts_val; + u64 dividend, divisor; + + /* Calculate CTS according to HDMI 1.3a spec*/ + dividend = (u64)tmds * n_param*1000; + divisor = 128 * aud_samp_freq; + cts_val = div64_u64(dividend, divisor); + pr_debug("TMDS value=%d, N value=%d, CTS Value=%d\n", + tmds, n_param, cts_val); + had_write_register(AUD_HDMI_CTS, (BIT(20) | cts_val)); +} + +/** + * snd_intelhad_prog_cts_v2 - Program HDMI audio CTS value + * + * @aud_samp_freq: sampling frequency of audio data + * @tmds: sampling frequency of the display data + * @n_param: N value, depends on aud_samp_freq + * @intelhaddata:substream private data + * + * Program CTS register based on the audio and display sampling frequency + */ +static void snd_intelhad_prog_cts_v2(u32 aud_samp_freq, u32 tmds, u32 n_param, + struct snd_intelhad *intelhaddata) +{ + u32 cts_val; + u64 dividend, divisor; + + /* Calculate CTS according to HDMI 1.3a spec*/ + dividend = (u64)tmds * n_param*1000; + divisor = 128 * aud_samp_freq; + cts_val = div64_u64(dividend, divisor); + pr_debug("TMDS value=%d, N value=%d, CTS Value=%d\n", + tmds, n_param, cts_val); + had_write_register(AUD_HDMI_CTS, (BIT(24) | cts_val)); +} + +static int had_calculate_n_value(u32 aud_samp_freq) +{ + s32 n_val; + + /* Select N according to HDMI 1.3a spec*/ + switch (aud_samp_freq) { + case AUD_SAMPLE_RATE_32: + n_val = 4096; + break; + + case AUD_SAMPLE_RATE_44_1: + n_val = 6272; + break; + + case AUD_SAMPLE_RATE_48: + n_val = 6144; + break; + + case AUD_SAMPLE_RATE_88_2: + n_val = 12544; + break; + + case AUD_SAMPLE_RATE_96: + n_val = 12288; + break; + + case AUD_SAMPLE_RATE_176_4: + n_val = 25088; + break; + + case HAD_MAX_RATE: + n_val = 24576; + break; + + default: + n_val = -EINVAL; + break; + } + return n_val; +} + +/** + * snd_intelhad_prog_n_v1 - Program HDMI audio N value + * + * @aud_samp_freq: sampling frequency of audio data + * @n_param: N value, depends on aud_samp_freq + * @intelhaddata:substream private data + * + * This function is called in the prepare callback. + * It programs based on the audio and display sampling frequency + */ +static int snd_intelhad_prog_n_v1(u32 aud_samp_freq, u32 *n_param, + struct snd_intelhad *intelhaddata) +{ + s32 n_val; + + n_val = had_calculate_n_value(aud_samp_freq); + + if (n_val < 0) + return n_val; + + had_write_register(AUD_N_ENABLE, (BIT(20) | n_val)); + *n_param = n_val; + return 0; +} + +/** + * snd_intelhad_prog_n_v2 - Program HDMI audio N value + * + * @aud_samp_freq: sampling frequency of audio data + * @n_param: N value, depends on aud_samp_freq + * @intelhaddata:substream private data + * + * This function is called in the prepare callback. + * It programs based on the audio and display sampling frequency + */ +static int snd_intelhad_prog_n_v2(u32 aud_samp_freq, u32 *n_param, + struct snd_intelhad *intelhaddata) +{ + s32 n_val; + + n_val = had_calculate_n_value(aud_samp_freq); + + if (n_val < 0) + return n_val; + + had_write_register(AUD_N_ENABLE, (BIT(24) | n_val)); + *n_param = n_val; + return 0; +} + +static void had_clear_underrun_intr_v1(struct snd_intelhad *intelhaddata) +{ + u32 hdmi_status, i = 0; + + /* Handle Underrun interrupt within Audio Unit */ + had_write_register(AUD_CONFIG, 0); + /* Reset buffer pointers */ + had_write_register(AUD_HDMI_STATUS, 1); + had_write_register(AUD_HDMI_STATUS, 0); + /** + * The interrupt status 'sticky' bits might not be cleared by + * setting '1' to that bit once... + */ + do { /* clear bit30, 31 AUD_HDMI_STATUS */ + had_read_register(AUD_HDMI_STATUS, &hdmi_status); + pr_debug("HDMI status =0x%x\n", hdmi_status); + if (hdmi_status & AUD_CONFIG_MASK_UNDERRUN) { + i++; + hdmi_status &= (AUD_CONFIG_MASK_SRDBG | + AUD_CONFIG_MASK_FUNCRST); + hdmi_status |= ~AUD_CONFIG_MASK_UNDERRUN; + had_write_register(AUD_HDMI_STATUS, hdmi_status); + } else + break; + } while (i < MAX_CNT); + if (i >= MAX_CNT) + pr_err("Unable to clear UNDERRUN bits\n"); +} + +static void had_clear_underrun_intr_v2(struct snd_intelhad *intelhaddata) +{ + u32 hdmi_status, i = 0; + + /* Handle Underrun interrupt within Audio Unit */ + had_write_register(AUD_CONFIG, 0); + /* Reset buffer pointers */ + had_write_register(AUD_HDMI_STATUS_v2, 1); + had_write_register(AUD_HDMI_STATUS_v2, 0); + /** + * The interrupt status 'sticky' bits might not be cleared by + * setting '1' to that bit once... + */ + do { /* clear bit30, 31 AUD_HDMI_STATUS */ + had_read_register(AUD_HDMI_STATUS_v2, &hdmi_status); + pr_debug("HDMI status =0x%x\n", hdmi_status); + if (hdmi_status & AUD_CONFIG_MASK_UNDERRUN) { + i++; + had_write_register(AUD_HDMI_STATUS_v2, hdmi_status); + } else + break; + } while (i < MAX_CNT); + if (i >= MAX_CNT) + pr_err("Unable to clear UNDERRUN bits\n"); +} + +/** + * snd_intelhad_open - stream initializations are done here + * @substream:substream for which the stream function is called + * + * This function is called whenever a PCM stream is opened + */ +static int snd_intelhad_open(struct snd_pcm_substream *substream) +{ + struct snd_intelhad *intelhaddata; + struct snd_pcm_runtime *runtime; + struct had_stream_pvt *stream; + struct had_pvt_data *had_stream; + int retval; + + pr_debug("snd_intelhad_open called\n"); + intelhaddata = snd_pcm_substream_chip(substream); + had_stream = intelhaddata->private_data; + runtime = substream->runtime; + underrun_count = 0; + + pm_runtime_get(intelhaddata->dev); + + if (had_get_hwstate(intelhaddata)) { + pr_err("%s: HDMI cable plugged-out\n", __func__); + retval = -ENODEV; + goto exit_put_handle; + } + + /* Check, if device already in use */ + if (runtime->private_data) { + pr_err("Device already in use\n"); + retval = -EBUSY; + goto exit_put_handle; + } + + /* set the runtime hw parameter with local snd_pcm_hardware struct */ + runtime->hw = snd_intel_hadstream; + + stream = kzalloc(sizeof(*stream), GFP_KERNEL); + if (!stream) { + retval = -ENOMEM; + goto exit_put_handle; + } + stream->stream_status = STREAM_INIT; + runtime->private_data = stream; + + retval = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (retval < 0) + goto exit_err; + + /* Make sure, that the period size is always aligned + * 64byte boundary + */ + retval = snd_pcm_hw_constraint_step(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64); + if (retval < 0) { + pr_err("%s:step_size=64 failed,err=%d\n", __func__, retval); + goto exit_err; + } + + return retval; +exit_err: + kfree(stream); +exit_put_handle: + pm_runtime_put(intelhaddata->dev); + runtime->private_data = NULL; + return retval; +} + +/** + * had_period_elapsed - updates the hardware pointer status + * @had_substream:substream for which the stream function is called + * + */ +static void had_period_elapsed(void *had_substream) +{ + struct snd_pcm_substream *substream = had_substream; + struct had_stream_pvt *stream; + + /* pr_debug("had_period_elapsed called\n"); */ + + if (!substream || !substream->runtime) + return; + stream = substream->runtime->private_data; + if (!stream) + return; + + if (stream->stream_status != STREAM_RUNNING) + return; + snd_pcm_period_elapsed(substream); +} + +/** + * snd_intelhad_init_stream - internal function to initialize stream info + * @substream:substream for which the stream function is called + * + */ +static int snd_intelhad_init_stream(struct snd_pcm_substream *substream) +{ + struct snd_intelhad *intelhaddata = snd_pcm_substream_chip(substream); + + pr_debug("snd_intelhad_init_stream called\n"); + + pr_debug("setting buffer ptr param\n"); + intelhaddata->stream_info.period_elapsed = had_period_elapsed; + intelhaddata->stream_info.had_substream = substream; + intelhaddata->stream_info.buffer_ptr = 0; + intelhaddata->stream_info.buffer_rendered = 0; + intelhaddata->stream_info.sfreq = substream->runtime->rate; + return 0; +} + +/** + * snd_intelhad_close- to free parameteres when stream is stopped + * + * @substream: substream for which the function is called + * + * This function is called by ALSA framework when stream is stopped + */ +static int snd_intelhad_close(struct snd_pcm_substream *substream) +{ + struct snd_intelhad *intelhaddata; + struct snd_pcm_runtime *runtime; + + pr_debug("snd_intelhad_close called\n"); + + intelhaddata = snd_pcm_substream_chip(substream); + runtime = substream->runtime; + + if (!runtime->private_data) { + pr_debug("close() might have called after failed open"); + return 0; + } + + intelhaddata->stream_info.buffer_rendered = 0; + intelhaddata->stream_info.buffer_ptr = 0; + intelhaddata->stream_info.str_id = 0; + intelhaddata->stream_info.had_substream = NULL; + + /* Check if following drv_status modification is required - VA */ + if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED) { + intelhaddata->drv_status = HAD_DRV_CONNECTED; + pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_CONNECTED\n", + __func__, __LINE__); + } + kfree(runtime->private_data); + runtime->private_data = NULL; + pm_runtime_put(intelhaddata->dev); + return 0; +} + +/** + * snd_intelhad_hw_params- to setup the hardware parameters + * like allocating the buffers + * + * @substream: substream for which the function is called + * @hw_params: hardware parameters + * + * This function is called by ALSA framework when hardware params are set + */ +static int snd_intelhad_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + unsigned long addr; + int pages, buf_size, retval; + + pr_debug("snd_intelhad_hw_params called\n"); + + if (!hw_params) + return -EINVAL; + + buf_size = params_buffer_bytes(hw_params); + retval = snd_pcm_lib_malloc_pages(substream, buf_size); + if (retval < 0) + return retval; + pr_debug("%s:allocated memory = %d\n", __func__, buf_size); + /* mark the pages as uncached region */ + addr = (unsigned long) substream->runtime->dma_area; + pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) / PAGE_SIZE; + retval = set_memory_uc(addr, pages); + if (retval) { + pr_err("set_memory_uc failed.Error:%d\n", retval); + return retval; + } + memset(substream->runtime->dma_area, 0, buf_size); + + return retval; +} + +/** + * snd_intelhad_hw_free- to release the resources allocated during + * hardware params setup + * + * @substream: substream for which the function is called + * + * This function is called by ALSA framework before close callback. + * + */ +static int snd_intelhad_hw_free(struct snd_pcm_substream *substream) +{ + unsigned long addr; + u32 pages; + + pr_debug("snd_intelhad_hw_free called\n"); + + /* mark back the pages as cached/writeback region before the free */ + if (substream->runtime->dma_area != NULL) { + addr = (unsigned long) substream->runtime->dma_area; + pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) / + PAGE_SIZE; + set_memory_wb(addr, pages); + return snd_pcm_lib_free_pages(substream); + } + return 0; +} + +/** + * snd_intelhad_pcm_trigger - stream activities are handled here + * @substream:substream for which the stream function is called + * @cmd:the stream commamd thats requested from upper layer + * This function is called whenever an a stream activity is invoked + */ +static int snd_intelhad_pcm_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + int caps, retval = 0; + unsigned long flag_irq; + struct snd_intelhad *intelhaddata; + struct had_stream_pvt *stream; + struct had_pvt_data *had_stream; + + pr_debug("snd_intelhad_pcm_trigger called\n"); + + intelhaddata = snd_pcm_substream_chip(substream); + stream = substream->runtime->private_data; + had_stream = intelhaddata->private_data; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + pr_debug("Trigger Start\n"); + + /* Disable local INTRs till register prgmng is done */ + if (had_get_hwstate(intelhaddata)) { + pr_err("_START: HDMI cable plugged-out\n"); + retval = -ENODEV; + break; + } + stream->stream_status = STREAM_RUNNING; + + had_stream->stream_type = HAD_RUNNING_STREAM; + + /* Enable Audio */ + /* + * ToDo: Need to enable UNDERRUN interrupts as well + * caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE; + */ + caps = HDMI_AUDIO_BUFFER_DONE; + retval = had_set_caps(HAD_SET_ENABLE_AUDIO_INT, &caps); + retval = had_set_caps(HAD_SET_ENABLE_AUDIO, NULL); + intelhaddata->ops->enable_audio(substream, 1); + + pr_debug("Processed _Start\n"); + + break; + + case SNDRV_PCM_TRIGGER_STOP: + pr_debug("Trigger Stop\n"); + spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irq); + intelhaddata->stream_info.str_id = 0; + intelhaddata->curr_buf = 0; + + /* Stop reporting BUFFER_DONE/UNDERRUN to above layers*/ + + had_stream->stream_type = HAD_INIT; + spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irq); + /* Disable Audio */ + /* + * ToDo: Need to disable UNDERRUN interrupts as well + * caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE; + */ + caps = HDMI_AUDIO_BUFFER_DONE; + had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps); + intelhaddata->ops->enable_audio(substream, 0); + /* Reset buffer pointers */ + intelhaddata->ops->reset_audio(1); + intelhaddata->ops->reset_audio(0); + stream->stream_status = STREAM_DROPPED; + had_set_caps(HAD_SET_DISABLE_AUDIO, NULL); + break; + + default: + retval = -EINVAL; + } + return retval; +} + +/** + * snd_intelhad_pcm_prepare- internal preparation before starting a stream + * + * @substream: substream for which the function is called + * + * This function is called when a stream is started for internal preparation. + */ +static int snd_intelhad_pcm_prepare(struct snd_pcm_substream *substream) +{ + int retval; + u32 disp_samp_freq, n_param; + struct snd_intelhad *intelhaddata; + struct snd_pcm_runtime *runtime; + struct had_pvt_data *had_stream; + + pr_debug("snd_intelhad_pcm_prepare called\n"); + + intelhaddata = snd_pcm_substream_chip(substream); + runtime = substream->runtime; + had_stream = intelhaddata->private_data; + + if (had_get_hwstate(intelhaddata)) { + pr_err("%s: HDMI cable plugged-out\n", __func__); + retval = -ENODEV; + goto prep_end; + } + + pr_debug("period_size=%d\n", + (int)frames_to_bytes(runtime, runtime->period_size)); + pr_debug("periods=%d\n", runtime->periods); + pr_debug("buffer_size=%d\n", (int)snd_pcm_lib_buffer_bytes(substream)); + pr_debug("rate=%d\n", runtime->rate); + pr_debug("channels=%d\n", runtime->channels); + + if (intelhaddata->stream_info.str_id) { + pr_debug("_prepare is called for existing str_id#%d\n", + intelhaddata->stream_info.str_id); + retval = snd_intelhad_pcm_trigger(substream, + SNDRV_PCM_TRIGGER_STOP); + return retval; + } + + retval = snd_intelhad_init_stream(substream); + if (retval) + goto prep_end; + + + /* Get N value in KHz */ + retval = had_get_caps(HAD_GET_DISPLAY_RATE, &disp_samp_freq); + if (retval) { + pr_err("querying display sampling freq failed %#x\n", retval); + goto prep_end; + } + + had_get_caps(HAD_GET_ELD, &intelhaddata->eeld); + + retval = intelhaddata->ops->prog_n(substream->runtime->rate, &n_param, + intelhaddata); + if (retval) { + pr_err("programming N value failed %#x\n", retval); + goto prep_end; + } + intelhaddata->ops->prog_cts(substream->runtime->rate, + disp_samp_freq, n_param, intelhaddata); + + intelhaddata->ops->prog_dip(substream, intelhaddata); + + retval = intelhaddata->ops->audio_ctrl(substream, intelhaddata); + + /* Prog buffer address */ + retval = snd_intelhad_prog_buffer(intelhaddata, + HAD_BUF_TYPE_A, HAD_BUF_TYPE_D); + + /* + * Program channel mapping in following order: + * FL, FR, C, LFE, RL, RR + */ + + had_write_register(AUD_BUF_CH_SWAP, SWAP_LFE_CENTER); + +prep_end: + return retval; +} + +/** + * snd_intelhad_pcm_pointer- to send the current buffer pointerprocessed by hw + * + * @substream: substream for which the function is called + * + * This function is called by ALSA framework to get the current hw buffer ptr + * when a period is elapsed + */ +static snd_pcm_uframes_t snd_intelhad_pcm_pointer( + struct snd_pcm_substream *substream) +{ + struct snd_intelhad *intelhaddata; + u32 bytes_rendered = 0; + u32 t; + int buf_id; + + /* pr_debug("snd_intelhad_pcm_pointer called\n"); */ + + intelhaddata = snd_pcm_substream_chip(substream); + + if (intelhaddata->flag_underrun) { + intelhaddata->flag_underrun = 0; + return SNDRV_PCM_POS_XRUN; + } + + /* Use a hw register to calculate sub-period position reports. + * This makes PulseAudio happier. + */ + + buf_id = intelhaddata->curr_buf % 4; + had_read_register(AUD_BUF_A_LENGTH + (buf_id * HAD_REG_WIDTH), &t); + + if ((t == 0) || (t == ((u32)-1L))) { + underrun_count++; + pr_debug("discovered buffer done for buf %d, count = %d\n", + buf_id, underrun_count); + + if (underrun_count > (HAD_MIN_PERIODS/2)) { + pr_debug("assume audio_codec_reset, underrun = %d - do xrun\n", + underrun_count); + underrun_count = 0; + return SNDRV_PCM_POS_XRUN; + } + } else { + /* Reset Counter */ + underrun_count = 0; + } + + t = intelhaddata->buf_info[buf_id].buf_size - t; + + if (intelhaddata->stream_info.buffer_rendered) + div_u64_rem(intelhaddata->stream_info.buffer_rendered, + intelhaddata->stream_info.ring_buf_size, + &(bytes_rendered)); + + intelhaddata->stream_info.buffer_ptr = bytes_to_frames( + substream->runtime, + bytes_rendered + t); + return intelhaddata->stream_info.buffer_ptr; +} + +/** + * snd_intelhad_pcm_mmap- mmaps a kernel buffer to user space for copying data + * + * @substream: substream for which the function is called + * @vma: struct instance of memory VMM memory area + * + * This function is called by OS when a user space component + * tries to get mmap memory from driver + */ +static int snd_intelhad_pcm_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + + pr_debug("snd_intelhad_pcm_mmap called\n"); + + pr_debug("entry with prot:%s\n", __func__); + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return remap_pfn_range(vma, vma->vm_start, + substream->dma_buffer.addr >> PAGE_SHIFT, + vma->vm_end - vma->vm_start, vma->vm_page_prot); +} + +int hdmi_audio_mode_change(struct snd_pcm_substream *substream) +{ + int retval = 0; + u32 disp_samp_freq, n_param; + struct snd_intelhad *intelhaddata; + + intelhaddata = snd_pcm_substream_chip(substream); + + /* Disable Audio */ + intelhaddata->ops->enable_audio(substream, 0); + + /* Update CTS value */ + retval = had_get_caps(HAD_GET_DISPLAY_RATE, &disp_samp_freq); + if (retval) { + pr_err("querying display sampling freq failed %#x\n", retval); + goto out; + } + + retval = intelhaddata->ops->prog_n(substream->runtime->rate, &n_param, + intelhaddata); + if (retval) { + pr_err("programming N value failed %#x\n", retval); + goto out; + } + intelhaddata->ops->prog_cts(substream->runtime->rate, + disp_samp_freq, n_param, intelhaddata); + + /* Enable Audio */ + intelhaddata->ops->enable_audio(substream, 1); + +out: + return retval; +} + +/*PCM operations structure and the calls back for the same */ +struct snd_pcm_ops snd_intelhad_playback_ops = { + .open = snd_intelhad_open, + .close = snd_intelhad_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = snd_intelhad_hw_params, + .hw_free = snd_intelhad_hw_free, + .prepare = snd_intelhad_pcm_prepare, + .trigger = snd_intelhad_pcm_trigger, + .pointer = snd_intelhad_pcm_pointer, + .mmap = snd_intelhad_pcm_mmap, +}; + +/** + * snd_intelhad_create - to crete alsa card instance + * + * @intelhaddata: pointer to internal context + * @card: pointer to card + * + * This function is called when the hdmi cable is plugged in + */ +static int snd_intelhad_create( + struct snd_intelhad *intelhaddata, + struct snd_card *card) +{ + int retval; + static struct snd_device_ops ops = { + }; + + pr_debug("snd_intelhad_create called\n"); + + if (!intelhaddata) + return -EINVAL; + + /* ALSA api to register the device */ + retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, intelhaddata, &ops); + return retval; +} +/** + * snd_intelhad_pcm_free - to free the memory allocated + * + * @pcm: pointer to pcm instance + * This function is called when the device is removed + */ +static void snd_intelhad_pcm_free(struct snd_pcm *pcm) +{ + pr_debug("Freeing PCM preallocated pages\n"); + snd_pcm_lib_preallocate_free_for_all(pcm); +} + +static int had_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 had_iec958_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol); + + ucontrol->value.iec958.status[0] = (intelhaddata->aes_bits >> 0) & 0xff; + ucontrol->value.iec958.status[1] = (intelhaddata->aes_bits >> 8) & 0xff; + ucontrol->value.iec958.status[2] = + (intelhaddata->aes_bits >> 16) & 0xff; + ucontrol->value.iec958.status[3] = + (intelhaddata->aes_bits >> 24) & 0xff; + return 0; +} +static int had_iec958_mask_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + ucontrol->value.iec958.status[0] = 0xff; + ucontrol->value.iec958.status[1] = 0xff; + ucontrol->value.iec958.status[2] = 0xff; + ucontrol->value.iec958.status[3] = 0xff; + return 0; +} +static int had_iec958_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + unsigned int val; + struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol); + + pr_debug("entered had_iec958_put\n"); + val = (ucontrol->value.iec958.status[0] << 0) | + (ucontrol->value.iec958.status[1] << 8) | + (ucontrol->value.iec958.status[2] << 16) | + (ucontrol->value.iec958.status[3] << 24); + if (intelhaddata->aes_bits != val) { + intelhaddata->aes_bits = val; + return 1; + } + return 1; +} + +static struct snd_kcontrol_new had_control_iec958_mask = { + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK), + .info = had_iec958_info, /* shared */ + .get = had_iec958_mask_get, +}; + +static struct snd_kcontrol_new had_control_iec958 = { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), + .info = had_iec958_info, + .get = had_iec958_get, + .put = had_iec958_put +}; + +static struct snd_intel_had_interface had_interface = { + .name = "hdmi-audio", + .query = hdmi_audio_query, + .suspend = hdmi_audio_suspend, + .resume = hdmi_audio_resume, +}; + +static struct had_ops had_ops_v1 = { + .enable_audio = snd_intelhad_enable_audio_v1, + .reset_audio = snd_intelhad_reset_audio_v1, + .prog_n = snd_intelhad_prog_n_v1, + .prog_cts = snd_intelhad_prog_cts_v1, + .audio_ctrl = snd_intelhad_prog_audio_ctrl_v1, + .prog_dip = snd_intelhad_prog_dip_v1, + .handle_underrun = had_clear_underrun_intr_v1, +}; + +static struct had_ops had_ops_v2 = { + .enable_audio = snd_intelhad_enable_audio_v2, + .reset_audio = snd_intelhad_reset_audio_v2, + .prog_n = snd_intelhad_prog_n_v2, + .prog_cts = snd_intelhad_prog_cts_v2, + .audio_ctrl = snd_intelhad_prog_audio_ctrl_v2, + .prog_dip = snd_intelhad_prog_dip_v2, + .handle_underrun = had_clear_underrun_intr_v2, +}; +/** + * hdmi_audio_probe - to create sound card instance for HDMI audio playabck + * + *@haddata: pointer to HAD private data + *@card_id: card for which probe is called + * + * This function is called when the hdmi cable is plugged in. This function + * creates and registers the sound card with ALSA + */ +int hdmi_audio_probe(void *deviceptr) +{ + int retval; + struct snd_pcm *pcm; + struct snd_card *card; + struct had_callback_ops ops_cb; + struct snd_intelhad *intelhaddata; + struct had_pvt_data *had_stream; + struct platform_device *devptr = deviceptr; + + pr_debug("Enter %s\n", __func__); + + pr_debug("hdmi_audio_probe dma_mask: %p\n", devptr->dev.dma_mask); + + /* allocate memory for saving internal context and working */ + intelhaddata = kzalloc(sizeof(*intelhaddata), GFP_KERNEL); + if (!intelhaddata) + return -ENOMEM; + + had_stream = kzalloc(sizeof(*had_stream), GFP_KERNEL); + if (!had_stream) { + retval = -ENOMEM; + goto free_haddata; + } + + had_data = intelhaddata; + ops_cb.intel_had_event_call_back = had_event_handler; + + /* registering with display driver to get access to display APIs */ + + retval = mid_hdmi_audio_setup( + ops_cb.intel_had_event_call_back, + &(intelhaddata->reg_ops), + &(intelhaddata->query_ops)); + if (retval) { + pr_err("querying display driver APIs failed %#x\n", retval); + goto free_hadstream; + } + mutex_lock(&had_mutex); + spin_lock_init(&intelhaddata->had_spinlock); + intelhaddata->drv_status = HAD_DRV_DISCONNECTED; + pr_debug("%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n", + __func__, __LINE__); + + /* create a card instance with ALSA framework */ + retval = snd_card_new(&devptr->dev, hdmi_card_index, hdmi_card_id, + THIS_MODULE, 0, &card); + + if (retval) + goto unlock_mutex; + intelhaddata->card = card; + intelhaddata->card_id = hdmi_card_id; + intelhaddata->card_index = card->number; + intelhaddata->private_data = had_stream; + intelhaddata->flag_underrun = 0; + intelhaddata->aes_bits = SNDRV_PCM_DEFAULT_CON_SPDIF; + strncpy(card->driver, INTEL_HAD, strlen(INTEL_HAD)); + strncpy(card->shortname, INTEL_HAD, strlen(INTEL_HAD)); + + retval = snd_pcm_new(card, INTEL_HAD, PCM_INDEX, MAX_PB_STREAMS, + MAX_CAP_STREAMS, &pcm); + if (retval) + goto err; + + /* setup private data which can be retrieved when required */ + pcm->private_data = intelhaddata; + pcm->private_free = snd_intelhad_pcm_free; + pcm->info_flags = 0; + strncpy(pcm->name, card->shortname, strlen(card->shortname)); + /* setup the ops for palyabck */ + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, + &snd_intelhad_playback_ops); + /* allocate dma pages for ALSA stream operations + * memory allocated is based on size, not max value + * thus using same argument for max & size + */ + retval = snd_pcm_lib_preallocate_pages_for_all(pcm, + SNDRV_DMA_TYPE_DEV, NULL, + HAD_MAX_BUFFER, HAD_MAX_BUFFER); + + if (card->dev == NULL) + pr_debug("card->dev is NULL!!!!! Should not be this case\n"); + else if (card->dev->dma_mask == NULL) + pr_debug("hdmi_audio_probe dma_mask is NULL!!!!!\n"); + else + pr_debug("hdmi_audio_probe dma_mask is : %p\n", + card->dev->dma_mask); + + if (retval) + goto err; + + /* internal function call to register device with ALSA */ + retval = snd_intelhad_create(intelhaddata, card); + if (retval) + goto err; + + card->private_data = &intelhaddata; + retval = snd_card_register(card); + if (retval) + goto err; + + /* IEC958 controls */ + retval = snd_ctl_add(card, snd_ctl_new1(&had_control_iec958_mask, + intelhaddata)); + if (retval < 0) + goto err; + retval = snd_ctl_add(card, snd_ctl_new1(&had_control_iec958, + intelhaddata)); + if (retval < 0) + goto err; + + init_channel_allocations(); + + /* Register channel map controls */ + retval = had_register_chmap_ctls(intelhaddata, pcm); + if (retval < 0) + goto err; + + intelhaddata->dev = &devptr->dev; + pm_runtime_set_active(intelhaddata->dev); + pm_runtime_enable(intelhaddata->dev); + + mutex_unlock(&had_mutex); + retval = mid_hdmi_audio_register(&had_interface, intelhaddata); + if (retval) { + pr_err("registering with display driver failed %#x\n", retval); + snd_card_free(card); + goto free_hadstream; + } + + intelhaddata->hw_silence = 1; + had_ops_v1 = had_ops_v1; /* unused */ + intelhaddata->ops = &had_ops_v2; + + return retval; +err: + snd_card_free(card); +unlock_mutex: + mutex_unlock(&had_mutex); +free_hadstream: + kfree(had_stream); + pm_runtime_disable(intelhaddata->dev); + intelhaddata->dev = NULL; +free_haddata: + kfree(intelhaddata); + intelhaddata = NULL; + pr_err("Error returned from %s api %#x\n", __func__, retval); + return retval; +} + +/** + * hdmi_audio_remove - removes the alsa card + * + *@haddata: pointer to HAD private data + * + * This function is called when the hdmi cable is un-plugged. This function + * free the sound card. + */ +int hdmi_audio_remove(void *pdevptr) +{ + struct snd_intelhad *intelhaddata = had_data; + int caps; + + pr_debug("Enter %s\n", __func__); + + if (!intelhaddata) + return 0; + + if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED) { + caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE; + had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps); + had_set_caps(HAD_SET_DISABLE_AUDIO, NULL); + } + snd_card_free(intelhaddata->card); + kfree(intelhaddata->private_data); + kfree(intelhaddata); + return 0; +} + +MODULE_AUTHOR("Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>"); +MODULE_AUTHOR("Ramesh Babu K V <ramesh.babu@intel.com>"); +MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@intel.com>"); +MODULE_AUTHOR("Jerome Anand <jerome.anand@intel.com>"); +MODULE_DESCRIPTION("Intel HDMI Audio driver"); +MODULE_LICENSE("GPL v2"); +MODULE_SUPPORTED_DEVICE("{Intel,Intel_HAD}"); |