inline int had_read_modify(uint32_t reg_addr, uint32_t data, uint32_t mask)
{
int retval;
struct snd_intelhad *intelhaddata = had_data;
retval = had_get_hwstate(intelhaddata);
if (!retval)
retval = intelhaddata->reg_ops.hdmi_audio_read_modify(
reg_addr, data, mask);
return retval;
}
inline int had_write_register(uint32_t reg_addr, uint32_t data)
{
int retval;
struct snd_intelhad *intelhaddata = had_data;
retval = had_get_hwstate(intelhaddata);
if (!retval)
retval = intelhaddata->reg_ops.hdmi_audio_write_register(
reg_addr, data);
return retval;
}
inline 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;
}
/**
* hdmi_audio_resume - power management resume function
*
*@haddata: pointer to HAD private data
*
* This function is called by client driver to resume the
* hdmi audio.
*/
int hdmi_audio_resume(void *haddata)
{
int caps, retval = 0;
struct snd_intelhad *intelhaddata = (struct snd_intelhad *)haddata;
unsigned long flag_irqs;
pr_debug("Enter:%s", __func__);
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_debug("had not connected\n");
return 0;
}
if (HAD_DRV_SUSPENDED != intelhaddata->drv_status) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_err("had is not in suspended state\n");
return 0;
}
if (had_get_hwstate(intelhaddata)) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_err("Failed to resume. Device not accessible\n");
return -ENODEV;
}
intelhaddata->drv_status = HAD_DRV_CONNECTED;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
/* 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);
pr_debug("Exit:%s", __func__);
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("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__);
snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
retval = -ENODEV;
goto prep_end;
}
pr_debug("period_size=%d\n",
frames_to_bytes(runtime, runtime->period_size));
pr_debug("periods=%d\n", runtime->periods);
pr_debug("buffer_size=%d\n", 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_SAMPLING_FREQ, &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 = snd_intelhad_prog_n(substream->runtime->rate, &n_param,
intelhaddata);
if (retval) {
pr_err("programming N value failed %#x\n", retval);
goto prep_end;
}
snd_intelhad_prog_cts(substream->runtime->rate,
disp_samp_freq, n_param, intelhaddata);
snd_intelhad_prog_dip(substream, intelhaddata, 0);
retval = snd_intelhad_init_audio_ctrl(substream, intelhaddata, 0);
/* Prog buffer address */
retval = snd_intelhad_prog_buffer(intelhaddata,
HAD_BUF_TYPE_A, HAD_BUF_TYPE_D);
prep_end:
return retval;
}
/**
* 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;
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;
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irq);
had_stream->stream_type = HAD_RUNNING_STREAM;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irq);
/* 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);
had_read_modify(AUD_CONFIG, 1, BIT(0));
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);
had_set_caps(HAD_SET_DISABLE_AUDIO, NULL);
had_read_modify(AUD_CONFIG, 0, BIT(0));
/* Reset buffer pointers */
had_write_register(AUD_HDMI_STATUS, 1);
had_write_register(AUD_HDMI_STATUS, 0);
stream->stream_status = STREAM_DROPPED;
break;
default:
retval = -EINVAL;
}
return retval;
}
/**
* snd_intelhad_init_audio_ctrl - to initialize audio channel status
* registers and confgiuration registers
*
* @substream:substream for which the prepare function is called
* @intelhaddata:substream private data
*
* This function is called in the prepare callback
*/
int snd_intelhad_init_audio_ctrl(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata,
int flag_silence)
{
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};
union aud_buf_config buf_cfg = {.buf_cfgval = 0};
u8 channels;
int format, retval;
u32 data;
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;
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:
case AUD_SAMPLE_RATE_88_2:
case AUD_SAMPLE_RATE_176_4:
ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_44KHZ;
break;
case AUD_SAMPLE_RATE_48:
case AUD_SAMPLE_RATE_96:
case HAD_MAX_RATE:
ch_stat0.status_0_regx.samp_freq = CH_STATUS_MAP_48KHZ;
break;
default:
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);
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;
}
cfg_val.cfg_regx.val_bit = 1;
had_write_register(AUD_CONFIG, cfg_val.cfg_regval);
return 0;
}
/**
* snd_intelhad_prog_dip - 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(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata,
int flag_silence)
{
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;
had_write_register(AUD_CNTL_ST, ctrl_state.ctrl_val);
frame2.fr2_regx.chnl_cnt = substream->runtime->channels - 1;
/*TODO: Read from intelhaddata->eeld.speaker_allocation_block;*/
frame3.fr3_regx.chnl_alloc = CHANNEL_ALLOCATION;
/*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_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;
}
inline 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 - 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(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_n - 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(u32 aud_samp_freq, u32 *n_param,
struct snd_intelhad *intelhaddata)
{
u32 n_val;
int retval = 0;
/* 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:
retval = -EINVAL;
break;
}
if (retval)
return retval;
had_write_register(AUD_N_ENABLE, (BIT(20) | n_val));
*n_param = n_val;
return retval;
}
/**
* 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;
/*
* HDMI driver might suspend the device already,
* so we return it on
*/
if (!ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_FORCE_POWER_ON)) {
pr_err("HDMI device can't be turned on\n");
return -ENODEV;
}
if (had_get_hwstate(intelhaddata)) {
pr_err("%s: HDMI cable plugged-out\n", __func__);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
return -ENODEV;
}
runtime = substream->runtime;
/* Check, if device already in use */
if (runtime->private_data) {
pr_err("Device already in use\n");
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
return -EBUSY;
}
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
/* 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_err;
}
stream->stream_status = STREAM_INIT;
runtime->private_data = stream;
retval = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (retval < 0) {
kfree(stream);
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);
kfree(stream);
goto exit_err;
}
return retval;
exit_err:
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;
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);
return;
}
/**
* 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("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;
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;
kfree(runtime->private_data);
runtime->private_data = NULL;
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;
BUG_ON(!hw_params);
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 */
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);
}
int had_process_buffer_done(struct snd_intelhad *intelhaddata)
{
int retval = 0;
u32 len = 1;
enum intel_had_aud_buf_type buf_id;
enum intel_had_aud_buf_type buff_done;
struct pcm_stream_info *stream;
u32 buf_size;
struct had_pvt_data *had_stream;
int intr_count;
enum had_status_stream stream_type;
unsigned long flag_irqs;
had_stream = intelhaddata->private_data;
stream = &intelhaddata->stream_info;
intr_count = 1;
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_err("%s:Device already disconnected\n", __func__);
return retval;
}
buf_id = intelhaddata->curr_buf;
intelhaddata->buff_done = buf_id;
buff_done = intelhaddata->buff_done;
buf_size = intelhaddata->buf_info[buf_id].buf_size;
stream_type = had_stream->stream_type;
pr_debug("Enter:%s buf_id=%d", __func__, buf_id);
/* Every debug statement has an implication
* of ~5msec. Thus, avoid having >3 debug statements
* for each buffer_done handling.
*/
/* Check for any intr_miss in case of active playback */
if (had_stream->stream_type == HAD_RUNNING_STREAM) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
intr_count = had_chk_intrmiss(intelhaddata, buf_id);
if (!intr_count || (intr_count > 3)) {
pr_err("HAD SW state in non-recoverable!!! mode\n");
pr_err("Already played stale data\n");
return retval;
}
buf_id += (intr_count - 1);
buf_id = buf_id % 4;
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
}
intelhaddata->buf_info[buf_id].is_valid = true;
if (intelhaddata->valid_buf_cnt-1 == buf_id) {
if (had_stream->stream_type >= HAD_RUNNING_STREAM)
intelhaddata->curr_buf = HAD_BUF_TYPE_A;
} else
intelhaddata->curr_buf = buf_id + 1;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
if (had_get_hwstate(intelhaddata)) {
pr_err("HDMI cable plugged-out\n");
return retval;
}
/*Reprogram the registers with addr and length*/
had_write_register(AUD_BUF_A_LENGTH +
(buf_id * HAD_REG_WIDTH), buf_size);
had_write_register(AUD_BUF_A_ADDR+(buf_id * HAD_REG_WIDTH),
intelhaddata->buf_info[buf_id].buf_addr|
BIT(0) | BIT(1));
had_read_register(AUD_BUF_A_LENGTH + (buf_id * HAD_REG_WIDTH),
&len);
pr_debug("%s:Enabled buf[%d]\n", __func__, buf_id);
/* In case of actual data,
* report buffer_done to above ALSA layer
*/
buf_size = intelhaddata->buf_info[buf_id].buf_size;
if (stream_type >= HAD_RUNNING_STREAM) {
intelhaddata->stream_info.buffer_rendered +=
(intr_count * buf_size);
stream->period_elapsed(stream->had_substream);
}
return retval;
}
