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OpenCloudOS-Kernel/sound/x86/intel_hdmi_audio.c

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ALSA: x86: hdmi: Add audio support for BYT and CHT Hdmi audio driver based on the child platform device created by gfx driver is implemented. This audio driver is derived from legacy intel hdmi audio driver. The interfaces for interaction between gfx and audio are updated and the driver implementation updated to derive interrupts in its own address space based on irq chip framework The changes to calculate sub-period positions was triggered by David Henningsson <david.henningsson@canonical.com> and is accomodated in this patch Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Jerome Anand <jerome.anand@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-01-25 06:57:52 +08:00
/*
* 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;
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;
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) {
pr_debug("discovered buffer done for buf %d\n", buf_id);
/* had_process_buffer_done(intelhaddata); */
}
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}");