--- /dev/null
+/*
+ * intel_mid_hdmi_audio.c - Intel HDMI audio driver for MID
+ *
+ * Copyright (C) 2010 Intel Corp
+ * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
+ * Ramesh Babu K V <ramesh.babu@intel.com>
+ * Vaibhav Agarwal <vaibhav.agarwal@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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * ALSA driver for Intel MID HDMI audio controller
+ */
+
+#define pr_fmt(fmt) "had: " fmt
+
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/slab.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_mid_hdmi_audio.h"
+
+#define PCM_INDEX 0
+#define MAX_PB_STREAMS 1
+#define MAX_CAP_STREAMS 0
+#define HDMI_AUDIO_DRIVER "hdmi-audio"
+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_pvt_data;
+
+module_param(hdmi_card_index, int, 0444);
+MODULE_PARM_DESC(hdmi_card_index,
+ "Index value for INTEL Intel HDMI Audio controller.");
+module_param(hdmi_card_id, charp, 0444);
+MODULE_PARM_DESC(hdmi_card_id,
+ "ID string for INTEL Intel HDMI Audio controller.");
+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_DESCRIPTION("Intel HDMI Audio driver");
+MODULE_LICENSE("GPL v2");
+MODULE_SUPPORTED_DEVICE("{Intel,Intel_HAD}");
+MODULE_VERSION(HAD_DRIVER_VERSION);
+
+#define INFO_FRAME_WORD1 0x000a0184
+#define FIFO_THRESHOLD 0xFE
+#define BYTES_PER_WORD 0x4
+#define CH_STATUS_MAP_32KHZ 0x3
+#define CH_STATUS_MAP_44KHZ 0x0
+#define CH_STATUS_MAP_48KHZ 0x2
+#define MAX_SMPL_WIDTH_20 0x0
+#define MAX_SMPL_WIDTH_24 0x1
+#define SMPL_WIDTH_16BITS 0x1
+#define SMPL_WIDTH_24BITS 0x5
+#define CHANNEL_ALLOCATION 0x1F
+#define MASK_BYTE0 0x000000FF
+#define VALID_DIP_WORDS 3
+#define LAYOUT0 0
+#define LAYOUT1 1
+
+/* 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_PERIOD_BYTES,
+ .period_bytes_min = HAD_MIN_PERIOD_BYTES,
+ .period_bytes_max = HAD_MAX_BUFFER,
+ .periods_min = HAD_MIN_PERIODS,
+ .periods_max = HAD_MAX_PERIODS,
+ .fifo_size = HAD_FIFO_SIZE,
+};
+
+/**
+ * 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 rate, format;
+
+ 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;
+ if (flag_silence)
+ rate = AUD_SAMPLE_RATE_44_1;
+ else
+ rate = substream->runtime->rate;
+
+ switch (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;
+
+ }
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_CH_STATUS_0, ch_stat0.status_0_regval);
+
+ if (flag_silence)
+ format = SNDRV_PCM_FORMAT_S24_LE;
+ else
+ 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;
+ }
+ intelhaddata->reg_ops.hdmi_audio_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;
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_CONFIG, buf_cfg.buf_cfgval);
+
+ if (flag_silence)
+ channels = HAD_MIN_CHANNEL;
+ else
+ 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;
+ intelhaddata->reg_ops.hdmi_audio_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;
+
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_CNTL_ST, ctrl_state.ctrl_val);
+
+ if (flag_silence)
+ frame2.fr2_regx.chnl_cnt = HAD_MIN_CHANNEL - 1;
+ else
+ frame2.fr2_regx.chnl_cnt = substream->runtime->channels - 1;
+
+ /* Set to stereo */
+ frame3.fr3_regx.chnl_alloc = 0;
+
+ /*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);
+
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_HDMIW_INFOFR, INFO_FRAME_WORD1);
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_HDMIW_INFOFR, frame2.fr2_val);
+ intelhaddata->reg_ops.hdmi_audio_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++)
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_HDMIW_INFOFR, 0x0);
+
+ ctrl_state.ctrl_regx.dip_freq = 1;
+ ctrl_state.ctrl_regx.dip_en_sta = 1;
+ intelhaddata->reg_ops.hdmi_audio_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;
+ ring_buf_addr = virt_to_phys(substream->runtime->dma_area);
+ 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;
+
+ pr_debug("Ring buffer address = %#x\n", ring_buf_addr);
+ pr_debug("Ring buffer size = %#x\n", ring_buf_size);
+ pr_debug("period size in bytes = %d\n", period_bytes);
+
+ /* buffer addr should be 64 byte aligned, period bytes
+ will be used to calculate addr offset*/
+ period_bytes &= ~0x3F;
+ pr_debug("period size in bytes after align = %d\n", period_bytes);
+
+ /* 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);
+
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH),
+ intelhaddata->buf_info[i].buf_addr |
+ BIT(0) | BIT(1));
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ period_bytes);
+ intelhaddata->buf_info[i].is_valid = true;
+ pr_debug("buf[%d] addr=%#x and size=%d\n", i,
+ intelhaddata->buf_info[i].buf_addr,
+ intelhaddata->buf_info[i].buf_size);
+ }
+ intelhaddata->valid_buf_cnt = num_periods;
+ return 0;
+}
+
+inline void snd_intelhad_read_len(struct snd_intelhad *intelhaddata)
+{
+ int i;
+ u32 len;
+ for (i = 0; i < 4 ; i++) {
+ /* Program the buf registers with addr and len */
+ intelhaddata->reg_ops.hdmi_audio_read_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ &len);
+ pr_debug("buf[%d] size=%d\n", i, len);
+ }
+}
+
+/**
+ * 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("CTS Value=%d\n", cts_val);
+ intelhaddata->reg_ops.hdmi_audio_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;
+ intelhaddata->reg_ops.hdmi_audio_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;
+ int retval;
+
+ pr_debug("snd_intelhad_open called\n");
+ intelhaddata = snd_pcm_substream_chip(substream);
+
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->drv_status != HAD_DRV_CONNECTED) {
+ pr_err("had in disconnected/suspended state :%d\n",
+ intelhaddata->drv_status);
+ mutex_unlock(&intelhaddata->had_lock);
+ return -ENODEV;
+ }
+
+ if (intelhaddata->playback_cnt > 0) {
+ mutex_unlock(&intelhaddata->had_lock);
+ return -EBUSY;
+ } else
+ intelhaddata->playback_cnt++;
+
+ mutex_unlock(&intelhaddata->had_lock);
+
+ runtime = substream->runtime;
+ /* 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;
+ }
+ mutex_lock(&intelhaddata->had_lock);
+ intelhaddata->drv_status = HAD_DRV_RUNNING;
+ mutex_unlock(&intelhaddata->had_lock);
+ return retval;
+exit_err:
+ mutex_lock(&intelhaddata->had_lock);
+ intelhaddata->playback_cnt--;
+ mutex_unlock(&intelhaddata->had_lock);
+ 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;
+
+ pr_debug("snd_intelhad_close called\n");
+ intelhaddata = snd_pcm_substream_chip(substream);
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->playback_cnt)
+ intelhaddata->playback_cnt--;
+
+ intelhaddata->stream_info.buffer_rendered = 0;
+ intelhaddata->stream_info.buffer_ptr = 0;
+ intelhaddata->stream_info.str_id = 0;
+
+ if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED)
+ intelhaddata->drv_status = HAD_DRV_CONNECTED;
+ mutex_unlock(&intelhaddata->had_lock);
+ kfree(substream->runtime->private_data);
+ 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)
+{
+ int retval;
+ u32 buf_size;
+
+ BUG_ON(!hw_params);
+ pr_debug("snd_intelhad_hw_params called\n");
+
+ buf_size = params_buffer_bytes(hw_params);
+
+ if (buf_size % 64) {
+ pr_err("Invalid buffer size\n");
+ return -EINVAL;
+ }
+
+ retval = snd_pcm_lib_malloc_pages(substream, buf_size);
+ if (retval < 0)
+ return retval;
+ pr_debug("allocated memory = %d\n", buf_size);
+ memset(substream->runtime->dma_area, 0, buf_size);
+
+ pr_debug("snd_intelhad_hw_params exited\n");
+ 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)
+{
+ pr_debug("snd_intelhad_hw_free called\n");
+ return snd_pcm_lib_free_pages(substream);
+}
+
+int snd_intelhad_configure_silence(struct snd_intelhad *intelhaddata)
+{
+ int retval = 0;
+ u32 disp_samp_freq, n_param;
+
+ pr_debug("Enter %s\n", __func__);
+ /* Get N value in KHz */
+ retval = intelhaddata->query_ops.hdmi_audio_get_caps(
+ HAD_GET_SAMPLING_FREQ, &disp_samp_freq);
+ if (retval) {
+ pr_err("querying display sampling freq failed %#x\n", retval);
+ goto out;
+ } else
+ pr_debug("%s:TMDS freq = %d kHz\n", __func__, disp_samp_freq);
+
+ retval = snd_intelhad_prog_n(AUD_SAMPLE_RATE_44_1, &n_param,
+ intelhaddata);
+ if (retval) {
+ pr_err("programming N value failed %#x\n", retval);
+ goto out;
+ }
+ snd_intelhad_prog_cts(AUD_SAMPLE_RATE_44_1, disp_samp_freq, n_param,
+ intelhaddata);
+
+ snd_intelhad_prog_dip(NULL, intelhaddata, 1);
+ retval = snd_intelhad_init_audio_ctrl(NULL, intelhaddata, 1);
+
+out:
+ return retval;
+}
+
+int snd_intelhad_start_silence(struct snd_intelhad *intelhaddata)
+{
+ int i, retval = 0;
+ u32 buf_addr;
+
+ pr_debug("Enter %s\n", __func__);
+
+ buf_addr = virt_to_phys(intelhaddata->flat_data);
+
+ /* Program buff C, D */
+ for (i = HAD_BUF_TYPE_C; i < HAD_MAX_PERIODS; i++) {
+ /* Program the buf registers with addr and len */
+ intelhaddata->buf_info[i].buf_addr = buf_addr;
+ intelhaddata->buf_info[i].buf_size = MAX_SZ_ZERO_BUF;
+
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH),
+ buf_addr | BIT(0) | BIT(1));
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ MAX_SZ_ZERO_BUF);
+ intelhaddata->buf_info[i].is_valid = true;
+ pr_debug("buf[%d] addr=%#x and size=%d\n", i,
+ intelhaddata->buf_info[i].buf_addr,
+ intelhaddata->buf_info[i].buf_size);
+ }
+ intelhaddata->valid_buf_cnt = HAD_MAX_PERIODS;
+ intelhaddata->curr_buf = HAD_BUF_TYPE_C;
+
+ intelhaddata->reg_ops.hdmi_audio_read_modify(AUD_CONFIG, 1,
+ BIT(0));
+
+ return retval;
+}
+
+int snd_intelhad_stop_silence(struct snd_intelhad *intelhaddata)
+{
+ int i, retval = 0;
+
+ pr_debug("Enter %s\n", __func__);
+
+ intelhaddata->reg_ops.hdmi_audio_read_modify(AUD_CONFIG, 0,
+ BIT(0));
+
+ /* Invalidate Audio buffers C & D */
+ for (i = HAD_BUF_TYPE_C; i < HAD_MAX_PERIODS; i++) {
+ /* Program the buf registers with addr and len */
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH),
+ 0);
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ 0);
+ }
+ /* Reset buffer pointers */
+ intelhaddata->reg_ops.hdmi_audio_write_register(AUD_HDMI_STATUS, 1);
+ intelhaddata->reg_ops.hdmi_audio_write_register(AUD_HDMI_STATUS, 0);
+
+ return retval;
+}
+
+void snd_process_stop_trigger(struct snd_intelhad *intelhaddata)
+{
+ int buf_id, buff_done, i;
+ u32 buf_addr;
+
+ buff_done = intelhaddata->buff_done;
+ if (intelhaddata->valid_buf_cnt-1 == buff_done)
+ buf_id = HAD_BUF_TYPE_A;
+ else
+ buf_id = buff_done + 1;
+
+ pr_debug("%s:buf_id=%d\n", __func__, buf_id);
+ /* Invalidate Audio buffers */
+ for (i = 0; i < HAD_MAX_PERIODS; i++) {
+ if (i == buf_id)
+ continue;
+ if (i < HAD_BUF_TYPE_C) {
+ /* invalidate */
+ intelhaddata->buf_info[i].buf_size = 0;
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH),
+ 0);
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ 0);
+ } else {
+ /* Program with silence buffer */
+ buf_addr = virt_to_phys(intelhaddata->flat_data);
+
+ /* Program the buf registers with addr and len */
+ intelhaddata->buf_info[i].buf_addr = buf_addr;
+ intelhaddata->buf_info[i].buf_size = MAX_SZ_ZERO_BUF;
+
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH),
+ buf_addr | BIT(0) | BIT(1));
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ (MAX_SZ_ZERO_BUF));
+ intelhaddata->buf_info[i].is_valid = true;
+ pr_debug("buf[%d] addr=%#x and size=%d\n", i,
+ intelhaddata->buf_info[i].buf_addr,
+ intelhaddata->buf_info[i].buf_size);
+
+ }
+ }
+}
+
+/**
+* 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 retval = 0;
+ int buf_id;
+ unsigned long flag_irq;
+ struct snd_intelhad *intelhaddata;
+ struct had_stream_pvt *stream;
+ struct hdmi_audio_registers_ops reg_ops;
+
+ intelhaddata = snd_pcm_substream_chip(substream);
+ stream = substream->runtime->private_data;
+ reg_ops = intelhaddata->reg_ops;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ pr_debug("Trigger Start\n");
+ stream->substream = substream;
+ stream->stream_status = STREAM_RUNNING;
+ snd_intelhad_read_len(intelhaddata);
+
+ /* Disable local INTRs till register prgmng is done */
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irq);
+ if (intelhaddata->buff_done == HAD_BUF_TYPE_D)
+ buf_id = HAD_BUF_TYPE_C;
+ else
+ buf_id = HAD_BUF_TYPE_D;
+
+ /* Re-program silence buffers */
+ if (buf_id == HAD_BUF_TYPE_C) {
+ /* Disable Buffer D*/
+ reg_ops.hdmi_audio_write_register(AUD_BUF_A_ADDR +
+ (HAD_BUF_TYPE_D * HAD_REG_WIDTH), 0);
+ reg_ops.hdmi_audio_write_register(AUD_BUF_A_LENGTH +
+ (HAD_BUF_TYPE_D * HAD_REG_WIDTH), 0);
+ }
+ retval = snd_intelhad_prog_buffer(intelhaddata, HAD_BUF_TYPE_A,
+ HAD_BUF_TYPE_B);
+ /* Start reporting BUFFER_DONE/UNDERRUN to above layers*/
+ intelhaddata->pcm_active = 1;
+ intelhaddata->start_trigger = 1;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irq);
+ pr_debug("Processed _Start, buf_id = %d\n", buf_id);
+
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ pr_debug("Trigger Stop\n");
+ snd_intelhad_read_len(intelhaddata);
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irq);
+ intelhaddata->stream_info.str_id = 0;
+ intelhaddata->send_data = 0;
+
+ /* Stop reporting BUFFER_DONE/UNDERRUN to above layers*/
+ intelhaddata->pcm_active = 0;
+ intelhaddata->stop_trigger = 1;
+ /* Send zero filled data */
+ if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED)
+ snd_process_stop_trigger(intelhaddata);
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irq);
+ cancel_delayed_work(&intelhaddata->dummy_audio);
+
+ stream->stream_status = STREAM_DROPPED;
+ 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;
+
+ pr_debug("pcm_prepare called\n");
+
+ runtime = substream->runtime;
+ 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);
+
+ intelhaddata = snd_pcm_substream_chip(substream);
+ 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;
+ }
+
+ intelhaddata->stream_info.str_id = intelhaddata->playback_cnt;
+ snprintf(substream->pcm->id, sizeof(substream->pcm->id),
+ "%d", intelhaddata->stream_info.str_id);
+ retval = snd_intelhad_init_stream(substream);
+ if (retval)
+ goto prep_end;
+ /* Get N value in KHz */
+ retval = intelhaddata->query_ops.hdmi_audio_get_caps(
+ HAD_GET_SAMPLING_FREQ, &disp_samp_freq);
+ if (retval) {
+ pr_err("querying display sampling freq failed %#x\n", retval);
+ goto prep_end;
+ } else
+ pr_debug("TMDS freq = %d kHz\n", disp_samp_freq);
+
+ 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);
+
+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;
+
+ intelhaddata = snd_pcm_substream_chip(substream);
+
+ if (intelhaddata->flag_underrun) {
+ intelhaddata->flag_underrun = 0;
+ return SNDRV_PCM_POS_XRUN;
+ }
+
+ 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);
+ return intelhaddata->stream_info.buffer_ptr;
+}
+
+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->reg_ops.hdmi_audio_read_modify(
+ AUD_CONFIG, 0, BIT(0));
+
+ /* Update CTS value */
+ retval = intelhaddata->query_ops.hdmi_audio_get_caps(
+ HAD_GET_SAMPLING_FREQ, &disp_samp_freq);
+ if (retval) {
+ pr_err("querying display sampling freq failed %#x\n", retval);
+ goto out;
+ } else
+ pr_debug("TMDS freq = %d kHz\n", disp_samp_freq);
+
+ retval = snd_intelhad_prog_n(substream->runtime->rate, &n_param,
+ intelhaddata);
+ if (retval) {
+ pr_err("programming N value failed %#x\n", retval);
+ goto out;
+ }
+ snd_intelhad_prog_cts(substream->runtime->rate,
+ disp_samp_freq, n_param, intelhaddata);
+
+ /* Enable Audio */
+ intelhaddata->reg_ops.hdmi_audio_read_modify(
+ AUD_CONFIG, 1, BIT(0));
+
+out:
+ return retval;
+}
+
+void dummy_audio_play(struct work_struct *work)
+{
+ struct snd_intelhad *intelhaddata = had_pvt_data;
+
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED) {
+ mutex_unlock(&intelhaddata->had_lock);
+ pr_debug("HDMI device still connected\n");
+ return;
+ }
+
+ if (!intelhaddata->send_data) {
+ mutex_unlock(&intelhaddata->had_lock);
+ pr_debug("HDMI device_flag is reset\n");
+ return;
+ }
+
+ had_event_handler(HAD_EVENT_AUDIO_BUFFER_DONE, intelhaddata);
+ mutex_unlock(&intelhaddata->had_lock);
+ schedule_delayed_work(&intelhaddata->dummy_audio, intelhaddata->timer);
+}
+
+/*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,
+};
+
+/**
+ * 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 __devinit snd_intelhad_create(
+ struct snd_intelhad *intelhaddata,
+ struct snd_card *card)
+{
+ int retval;
+ static struct snd_device_ops ops = {
+ };
+
+ BUG_ON(!intelhaddata);
+ /* 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);
+ mutex_lock(&intelhaddata->had_lock);
+ 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;
+ mutex_unlock(&intelhaddata->had_lock);
+ 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);
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->aes_bits != val) {
+ intelhaddata->aes_bits = val;
+ mutex_unlock(&intelhaddata->had_lock);
+ return 1;
+ }
+ mutex_unlock(&intelhaddata->had_lock);
+ 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",
+ .suspend = hdmi_audio_suspend,
+ .resume = hdmi_audio_resume,
+};
+
+/**
+ * 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
+ */
+static int __devinit hdmi_audio_probe(struct platform_device *devptr)
+{
+
+ int retval;
+ struct snd_pcm *pcm;
+ struct snd_card *card;
+ struct had_callback_ops ops_cb;
+ struct snd_intelhad *intelhaddata;
+
+ pr_debug("Enter %s\n", __func__);
+
+ /* allocate memory for saving internal context and working */
+ intelhaddata = kzalloc(sizeof(*intelhaddata), GFP_KERNEL);
+ if (!intelhaddata) {
+ pr_err("mem alloc failed\n");
+ return -ENOMEM;
+ }
+
+ had_pvt_data = intelhaddata;
+ ops_cb.intel_had_event_call_back = had_event_handler;
+
+ /* registering with display driver to get access to display APIs */
+
+ retval = intel_hdmi_audio_query_capabilities(
+ 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_haddata;
+ }
+ mutex_lock(&had_mutex);
+ mutex_init(&intelhaddata->had_lock);
+ spin_lock_init(&intelhaddata->had_spinlock);
+ intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
+ /* create a card instance with ALSA framework */
+ retval = snd_card_create(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->playback_cnt = 0;
+ 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 */
+ retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ HAD_MIN_BUFFER, HAD_MAX_BUFFER);
+ 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;
+
+ /* Initialize dummy audio workqueue */
+ INIT_DELAYED_WORK(&intelhaddata->dummy_audio, dummy_audio_play);
+
+ /* Allocate memory for flat data */
+ intelhaddata->flat_data = kzalloc((MAX_SZ_ZERO_BUF), GFP_KERNEL);
+ if (!intelhaddata->flat_data) {
+ retval = -ENOMEM;
+ goto err;
+ }
+
+ mutex_unlock(&had_mutex);
+ retval = display_register(&had_interface, intelhaddata);
+ if (retval) {
+ pr_err("registering with display driver failed %#x\n", retval);
+ snd_card_free(card);
+ goto free_haddata;
+ }
+
+ return retval;
+err:
+ pr_err("Error returned from %s api %#x\n", __func__, retval);
+ snd_card_free(card);
+unlock_mutex:
+ mutex_unlock(&had_mutex);
+free_haddata:
+ kfree(intelhaddata);
+ intelhaddata = NULL;
+ 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.
+ */
+static int __devexit hdmi_audio_remove(struct platform_device *devptr)
+{
+ struct snd_intelhad *intelhaddata = had_pvt_data;
+ int caps;
+
+ pr_debug("Enter %s\n", __func__);
+
+ if (!intelhaddata)
+ return 0;
+
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED) {
+ caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
+ intelhaddata->query_ops.hdmi_audio_set_caps(
+ HAD_SET_DISABLE_AUDIO_INT, &caps);
+ intelhaddata->query_ops.hdmi_audio_set_caps(
+ HAD_SET_DISABLE_AUDIO, NULL);
+ snd_intelhad_stop_silence(intelhaddata);
+ }
+ kfree(intelhaddata->flat_data);
+ snd_card_free(intelhaddata->card);
+ mutex_unlock(&intelhaddata->had_lock);
+ kfree(intelhaddata);
+ return 0;
+}
+
+static struct platform_driver had_driver = {
+ .probe = hdmi_audio_probe,
+ .remove = __devexit_p(hdmi_audio_remove),
+ .suspend = NULL,
+ .resume = NULL,
+ .driver = {
+ .name = HDMI_AUDIO_DRIVER
+ },
+};
+
+/*
+* alsa_card_intelhad_init- driver init function
+* This function is called when driver module is inserted
+*/
+static int __init alsa_card_intelhad_init(void)
+{
+ int retval;
+
+ pr_debug("Enter %s\n", __func__);
+
+ pr_info("******** HAD DRIVER loading.. Ver: %s\n",
+ HAD_DRIVER_VERSION);
+
+ retval = platform_driver_register(&had_driver);
+ if (retval < 0) {
+ pr_err("Platform driver register failed\n");
+ return retval;
+ }
+
+ pr_debug("init complete\n");
+ return retval;
+}
+
+/**
+* alsa_card_intelhad_exit- driver exit function
+* This function is called when driver module is removed
+*/
+static void __exit alsa_card_intelhad_exit(void)
+{
+ pr_debug("had_exit called\n");
+ platform_driver_unregister(&had_driver);
+}
+late_initcall(alsa_card_intelhad_init);
+module_exit(alsa_card_intelhad_exit);
--- /dev/null
+/*
+ * intel_mid_hdmi_audio.h - Intel HDMI audio driver for MID
+ *
+ * Copyright (C) 2010 Intel Corp
+ * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
+ * Ramesh Babu K V <ramesh.babu@intel.com>
+ * Vaibhav Agarwal <vaibhav.agarwal@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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * ALSA driver for Intel MID HDMI audio controller
+ */
+#ifndef __INTEL_MID_HDMI_AUDIO_H
+#define __INTEL_MID_HDMI_AUDIO_H
+
+#include <linux/types.h>
+#include <sound/initval.h>
+#include <linux/version.h>
+#include <sound/asoundef.h>
+#include <sound/control.h>
+#include <psb_intel_hdmi.h>
+#include <mdfld_hdmi_audio_if.h>
+
+#define HAD_DRIVER_VERSION "0.01.003"
+#define HAD_MAX_DEVICES 1
+#define HAD_MIN_CHANNEL 2
+#define HAD_MAX_CHANNEL 8
+#define HAD_NUM_OF_RING_BUFS 4
+#define HAD_MIN_RATE 32000
+#define HAD_MAX_RATE 192000
+#define HAD_MAX_BUFFER (800*1024)
+#define HAD_MIN_BUFFER (800*1024)
+#define HAD_MAX_PERIODS 4
+#define HAD_MIN_PERIODS 4
+#define HAD_MAX_PERIOD_BYTES HAD_MAX_BUFFER
+#define HAD_MIN_PERIOD_BYTES 256
+#define HAD_FIFO_SIZE 0 /* fifo not being used */
+
+#define AUD_SAMPLE_RATE_32 HAD_MIN_RATE
+#define AUD_SAMPLE_RATE_44_1 44100
+#define AUD_SAMPLE_RATE_48 48000
+#define AUD_SAMPLE_RATE_88_2 88200
+#define AUD_SAMPLE_RATE_96 96000
+#define AUD_SAMPLE_RATE_176_4 176400
+#define AUD_SAMPLE_RATE_192 HAD_MAX_RATE
+
+#define DRIVER_NAME "intelmid_hdmi_audio"
+#define DIS_SAMPLE_RATE_25_2 25200
+#define DIS_SAMPLE_RATE_27 27000
+#define DIS_SAMPLE_RATE_54 54000
+#define DIS_SAMPLE_RATE_74_25 74250
+#define DIS_SAMPLE_RATE_148_5 148500
+#define HAD_REG_WIDTH 0x08
+#define HAD_MAX_HW_BUFS 0x04
+#define HAD_MAX_DIP_WORDS 16
+#define INTEL_HAD "IntelHDMI"
+
+/* _AUD_CONFIG register MASK */
+#define AUD_CONFIG_MASK_UNDERRUN 0xC0000000
+#define AUD_CONFIG_MASK_SRDBG 0x00000002
+#define AUD_CONFIG_MASK_FUNCRST 0x00000001
+
+#define MAX_CNT 0xFF
+#define MAX_SZ_ZERO_BUF (1024*8)
+
+/**
+ * enum had_status - Audio stream states
+ *
+ * @STREAM_INIT: Stream initialized
+ * @STREAM_RUNNING: Stream running
+ * @STREAM_PAUSED: Stream paused
+ * @STREAM_DROPPED: Stream dropped
+ * */
+enum had_stream_status {
+ STREAM_INIT = 0,
+ STREAM_RUNNING = 1,
+ STREAM_PAUSED = 2,
+ STREAM_DROPPED = 3
+};
+
+enum had_drv_status {
+ HAD_DRV_CONNECTED,
+ HAD_DRV_RUNNING,
+ HAD_DRV_DISCONNECTED,
+ HAD_DRV_SUSPENDED,
+ HAD_DRV_ERR,
+};
+
+/* enum intel_had_aud_buf_type - HDMI controller ring buffer types */
+enum intel_had_aud_buf_type {
+ HAD_BUF_TYPE_A = 0,
+ HAD_BUF_TYPE_B = 1,
+ HAD_BUF_TYPE_C = 2,
+ HAD_BUF_TYPE_D = 3,
+};
+
+enum num_aud_ch {
+ CH_STEREO = 0,
+ CH_THREE_FOUR = 1,
+ CH_FIVE_SIX = 2,
+ CH_SEVEN_EIGHT = 3
+};
+
+/*HDMI controller register offsets*/
+enum hdmi_ctrl_reg {
+ AUD_CONFIG = 0x69000,
+ AUD_CH_STATUS_0 = 0x69008,
+ AUD_CH_STATUS_1 = 0x6900C,
+ AUD_HDMI_CTS = 0x69010,
+ AUD_N_ENABLE = 0x69014,
+ AUD_SAMPLE_RATE = 0x69018,
+ AUD_BUF_CONFIG = 0x69020,
+ AUD_BUF_CH_SWAP = 0x69024,
+ AUD_BUF_A_ADDR = 0x69040,
+ AUD_BUF_A_LENGTH = 0x69044,
+ AUD_BUF_B_ADDR = 0x69048,
+ AUD_BUF_B_LENGTH = 0x6904c,
+ AUD_BUF_C_ADDR = 0x69050,
+ AUD_BUF_C_LENGTH = 0x69054,
+ AUD_BUF_D_ADDR = 0x69058,
+ AUD_BUF_D_LENGTH = 0x6905c,
+ AUD_CNTL_ST = 0x69060,
+ AUD_HDMI_STATUS = 0x69068,
+ AUD_HDMIW_INFOFR = 0x69114,
+};
+
+/**
+ * union aud_cfg - Audio configuration offset - 69000
+ *
+ * @cfg_regx: individual register bits
+ * @cfg_regval: full register value
+ *
+ * */
+union aud_cfg {
+ struct {
+ u32 aud_en:1;
+ u32 layout:1;
+ u32 fmt:2;
+ u32 num_ch:2;
+ u32 rsvd0:1;
+ u32 set:1;
+ u32 flat:1;
+ u32 val_bit:1;
+ u32 user_bit:1;
+ u32 underrun:1;
+ u32 rsvd1:20;
+ } cfg_regx;
+ u32 cfg_regval;
+};
+
+/**
+ * union aud_ch_status_0 - Audio Channel Status 0 Attributes offset - 0x69008
+ *
+ * @status_0_regx:individual register bits
+ * @status_0_regval:full register value
+ *
+ * */
+union aud_ch_status_0 {
+ struct {
+ u32 ch_status:1;
+ u32 lpcm_id:1;
+ u32 cp_info:1;
+ u32 format:3;
+ u32 mode:2;
+ u32 ctg_code:8;
+ u32 src_num:4;
+ u32 ch_num:4;
+ u32 samp_freq:4;
+ u32 clk_acc:2;
+ u32 rsvd:2;
+ } status_0_regx;
+ u32 status_0_regval;
+};
+
+/**
+ * union aud_ch_status_1 - Audio Channel Status 1 Attributes offset - 0x6900c
+ *
+ * @status_1_regx: individual register bits
+ * @status_1_regval: full register value
+ *
+ **/
+union aud_ch_status_1 {
+ struct {
+ u32 max_wrd_len:1;
+ u32 wrd_len:3;
+ u32 rsvd:28;
+ } status_1_regx;
+ u32 status_1_regval;
+};
+
+/**
+ * union aud_hdmi_cts - CTS register offset -0x69010
+ *
+ * @cts_regx: individual register bits
+ * @cts_regval: full register value
+ *
+ * */
+union aud_hdmi_cts {
+ struct {
+ u32 cts_val:20;
+ u32 en_cts_prog:1;
+ u32 rsvd:11;
+ } cts_regx;
+ u32 cts_regval;
+};
+
+/**
+ * union aud_hdmi_n_enable - N register offset -0x69014
+ *
+ * @n_regx: individual register bits
+ * @n_regval: full register value
+ *
+*/
+union aud_hdmi_n_enable {
+ struct {
+ u32 n_val:20;
+ u32 en_n_prog:1;
+ u32 rsvd:11;
+ } n_regx;
+ u32 n_regval;
+};
+
+/**
+ * union aud_buf_config - Audio Buffer configurations offset -0x69020
+ *
+ * @buf_cfg_regx: individual register bits
+ * @buf_cfgval: full register value
+ *
+*/
+union aud_buf_config {
+ struct {
+ u32 fifo_width:8;
+ u32 rsvd0:8;
+ u32 aud_delay:8;
+ u32 rsvd1:8;
+ } buf_cfg_regx;
+ u32 buf_cfgval;
+};
+
+/**
+ * union aud_buf_ch_swap - Audio Sample Swapping offset - 0x69024
+ *
+ * @buf_ch_swap_regx: individual register bits
+ * @buf_ch_swap_val: full register value
+ *
+ * */
+union aud_buf_ch_swap {
+ struct {
+ u32 first_0:3;
+ u32 second_0:3;
+ u32 first_1:3;
+ u32 second_1:3;
+ u32 first_2:3;
+ u32 second_2:3;
+ u32 first_3:3;
+ u32 second_3:3;
+ u32 rsvd:8;
+ } buf_ch_swap_regx;
+ u32 buf_ch_swap_val;
+};
+
+/**
+ * union aud_buf_addr - Address for Audio Buffer
+ *
+ * @buf_addr_regx: individual register bits
+ * @buf_addr_val: full register value
+ *
+ * */
+union aud_buf_addr {
+ struct {
+ u32 valid:1;
+ u32 intr_en:1;
+ u32 rsvd:4;
+ u32 addr:26;
+ } buf_addr_regx;
+ u32 buf_addr_val;
+};
+
+/**
+ * union aud_buf_len - Length of Audio Buffer
+ *
+ * @buf_len_regx: individual register bits
+ * @buf_len_val: full register value
+ *
+ * */
+union aud_buf_len {
+ struct {
+ u32 buf_len:20;
+ u32 rsvd:12;
+ } buf_len_regx;
+ u32 buf_len_val;
+};
+
+/**
+ * union aud_ctrl_st - Audio Control State Register offset 0x69060
+ *
+ * @ctrl_regx: individual register bits
+ * @ctrl_val: full register value
+ *
+ * */
+union aud_ctrl_st {
+ struct {
+ u32 ram_addr:4;
+ u32 eld_ack:1;
+ u32 eld_addr:4;
+ u32 eld_buf_size:5;
+ u32 eld_valid:1;
+ u32 cp_ready:1;
+ u32 dip_freq:2;
+ u32 dip_idx:3;
+ u32 dip_en_sta:4;
+ u32 rsvd:7;
+ } ctrl_regx;
+ u32 ctrl_val;
+};
+
+/**
+ * union aud_info_frame1 - Audio HDMI Widget Data Island Packet offset 0x69114
+ *
+ * @fr1_regx: individual register bits
+ * @fr1_val: full register value
+ *
+ * */
+union aud_info_frame1 {
+ struct {
+ u32 pkt_type:8;
+ u32 ver_num:8;
+ u32 len:5;
+ u32 rsvd:11;
+ } fr1_regx;
+ u32 fr1_val;
+};
+
+/**
+ * union aud_info_frame2 - DIP frame 2
+ *
+ * @fr2_regx: individual register bits
+ * @fr2_val: full register value
+ *
+ */
+union aud_info_frame2 {
+ struct {
+ u32 chksum:8;
+ u32 chnl_cnt:3;
+ u32 rsvd0:1;
+ u32 coding_type:4;
+ u32 smpl_size:2;
+ u32 smpl_freq:3;
+ u32 rsvd1:3;
+ u32 format:8;
+ } fr2_regx;
+ u32 fr2_val;
+};
+
+/**
+ * union aud_info_frame3 - DIP frame 3
+ *
+ * @fr3_regx: individual register bits
+ * @fr3_val: full register value
+ *
+ */
+union aud_info_frame3 {
+ struct {
+ u32 chnl_alloc:8;
+ u32 rsvd0:3;
+ u32 lsv:4;
+ u32 dm_inh:1;
+ u32 rsvd1:16;
+ } fr3_regx;
+ u32 fr3_val;
+};
+
+
+struct pcm_stream_info {
+ int str_id;
+ void *had_substream;
+ void (*period_elapsed) (void *had_substream);
+ u32 buffer_ptr;
+ u64 buffer_rendered;
+ u32 ring_buf_size;
+ int sfreq;
+};
+
+struct ring_buf_info {
+ uint32_t buf_addr;
+ uint32_t buf_size;
+ uint8_t is_valid;
+};
+
+struct had_stream_pvt {
+ enum had_stream_status stream_status;
+ int stream_ops;
+ struct snd_pcm_substream *substream;
+ ssize_t dbg_cum_bytes;
+};
+
+struct had_callback_ops {
+ had_event_call_back intel_had_event_call_back;
+};
+
+/**
+ * struct snd_intelhad - intelhad driver structure
+ *
+ * @card: ptr to hold card details
+ * @card_index: sound card index
+ * @card_id: detected sound card id
+ * @reg_ops: register operations to program registers
+ * @query_ops: caps call backs for get/set operations
+ * @drv_status: driver status
+ * @playback_cnt: active playback streams
+ * @buf_info: ring buffer info
+ * @stream_info: stream information
+ * @eeld: holds EELD info
+ * @curr_buf: pointer to hold current active ring buf
+ * @valid_buf_cnt: ring buffer count for stream
+ * @had_lock: driver mutex lock
+ * @aes_bits: IEC958 status bits
+ */
+struct snd_intelhad {
+ struct snd_card *card;
+ int card_index;
+ char *card_id;
+ struct hdmi_audio_registers_ops reg_ops;
+ struct hdmi_audio_query_set_ops query_ops;
+ enum had_drv_status drv_status;
+ int playback_cnt;
+ struct ring_buf_info buf_info[HAD_NUM_OF_RING_BUFS];
+ struct pcm_stream_info stream_info;
+ hdmi_eeld_t eeld;
+ enum intel_had_aud_buf_type curr_buf;
+ int valid_buf_cnt;
+ struct mutex had_lock;
+ unsigned int aes_bits;
+ int flag_underrun;
+ /* Related to sending dummy data */
+ struct delayed_work dummy_audio;
+ int send_data;
+ unsigned long timer;
+ /* Related to sending silence data */
+ char *flat_data;
+ int pcm_active;
+ int start_trigger;
+ int stop_trigger;
+ spinlock_t had_spinlock;
+ enum intel_had_aud_buf_type buff_done;
+};
+
+int had_event_handler(enum had_event_type event_type, void *data);
+
+int hdmi_audio_suspend(void *drv_data, pm_event_t event);
+int hdmi_audio_resume(void *drv_data);
+int hdmi_audio_mode_change(struct snd_pcm_substream *substream);
+extern struct snd_pcm_ops snd_intelhad_playback_ops;
+int snd_intelhad_start_silence(struct snd_intelhad *intelhaddata);
+int snd_intelhad_stop_silence(struct snd_intelhad *intelhaddata);
+int snd_intelhad_configure_silence(struct snd_intelhad *intelhaddata);
+int snd_intelhad_init_audio_ctrl(struct snd_pcm_substream *substream,
+ struct snd_intelhad *intelhaddata,
+ int flag_silence);
+int snd_intelhad_prog_buffer(struct snd_intelhad *intelhaddata,
+ int start, int end);
+inline void snd_intelhad_read_len(struct snd_intelhad *intelhaddata);
+#endif
--- /dev/null
+/*
+ * intel_mid_hdmi_audio_if.c - Intel HDMI audio driver for MID
+ *
+ * Copyright (C) 2010 Intel Corp
+ * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
+ * Ramesh Babu K V <ramesh.babu@intel.com>
+ * Vaibhav Agarwal <vaibhav.agarwal@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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * ALSA driver for Intel MID HDMI audio controller. This file contains
+ * interface functions exposed to HDMI Display driver and code to register
+ * with ALSA framework..
+ */
+
+#define pr_fmt(fmt) "had: " fmt
+
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <sound/pcm.h>
+#include <sound/core.h>
+#include "intel_mid_hdmi_audio.h"
+
+static int flag_en_allbufs;
+
+/**
+ * hdmi_audio_suspend - power management suspend function
+ *
+ *@haddata: pointer to HAD private data
+ *@event: pm event for which this method is invoked
+ *
+ * This function is called by client driver to suspend the
+ * hdmi audio.
+ */
+int hdmi_audio_suspend(void *haddata, pm_event_t event)
+{
+ int caps, retval = 0;
+ struct snd_intelhad *intelhaddata = (struct snd_intelhad *)haddata;
+ pr_debug("Enter:%s", __func__);
+
+ if (intelhaddata->playback_cnt > 0) {
+ pr_err("audio stream is active\n");
+ return -EBUSY;
+ }
+
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
+ pr_debug("had not connected\n");
+ mutex_unlock(&intelhaddata->had_lock);
+ return retval;
+ }
+
+ intelhaddata->drv_status = HAD_DRV_SUSPENDED;
+ caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
+ intelhaddata->query_ops.hdmi_audio_set_caps(
+ HAD_SET_DISABLE_AUDIO_INT, &caps);
+ intelhaddata->query_ops.hdmi_audio_set_caps(
+ HAD_SET_DISABLE_AUDIO, NULL);
+ retval = snd_intelhad_stop_silence(intelhaddata);
+ mutex_unlock(&intelhaddata->had_lock);
+ 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;
+ pr_debug("Enter:%s", __func__);
+
+ mutex_lock(&intelhaddata->had_lock);
+ if (HAD_DRV_DISCONNECTED == intelhaddata->drv_status) {
+ pr_debug("had not connected\n");
+ mutex_unlock(&intelhaddata->had_lock);
+ return 0;
+ }
+
+ if (HAD_DRV_SUSPENDED != intelhaddata->drv_status) {
+ pr_err("had is not in suspended state\n");
+ mutex_unlock(&intelhaddata->had_lock);
+ return 0;
+ }
+
+ if (SNDRV_DEFAULT_IDX1 == intelhaddata->card_index)
+ intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
+ else {
+ intelhaddata->drv_status = HAD_DRV_CONNECTED;
+ caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
+ retval = intelhaddata->query_ops.hdmi_audio_set_caps(
+ HAD_SET_ENABLE_AUDIO_INT, &caps);
+ retval = intelhaddata->query_ops.hdmi_audio_set_caps(
+ HAD_SET_ENABLE_AUDIO, NULL);
+ retval = snd_intelhad_configure_silence(intelhaddata);
+ retval = snd_intelhad_start_silence(intelhaddata);
+ }
+ mutex_unlock(&intelhaddata->had_lock);
+ return retval;
+}
+
+int had_process_buffer_done(struct snd_intelhad *intelhaddata)
+{
+ int i = 0, retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ struct pcm_stream_info *stream;
+ u32 buf_size;
+ struct snd_pcm_substream *substream;
+ struct hdmi_audio_registers_ops reg_ops;
+ struct hdmi_audio_query_set_ops query_ops;
+ u32 buf_addr;
+ int pcm_active;
+
+ spin_lock(&intelhaddata->had_spinlock);
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ pcm_active = intelhaddata->pcm_active;
+ spin_unlock(&intelhaddata->had_spinlock);
+
+ substream = intelhaddata->stream_info.had_substream;
+ reg_ops = intelhaddata->reg_ops;
+ query_ops = intelhaddata->query_ops;
+
+ pr_debug("Enter:%s buf_id=%d", __func__, buf_id);
+ stream = &intelhaddata->stream_info;
+ buf_size = intelhaddata->buf_info[buf_id].buf_size;
+
+ /* Program actual data buffer, in case _START trigger recieved */
+ if (intelhaddata->start_trigger) {
+ spin_lock(&intelhaddata->had_spinlock);
+ intelhaddata->start_trigger = 0;
+ intelhaddata->curr_buf = HAD_BUF_TYPE_A;
+ spin_unlock(&intelhaddata->had_spinlock);
+ retval = snd_intelhad_prog_buffer(intelhaddata,
+ HAD_BUF_TYPE_C, HAD_BUF_TYPE_D);
+ return retval;
+ }
+
+ /* Program Silence buffer, in case _STOP trigger recieved */
+ if (intelhaddata->stop_trigger) {
+ pr_debug("processing stop trigger in hanlder:bufid=%d\n",
+ buf_id);
+ spin_lock(&intelhaddata->had_spinlock);
+ intelhaddata->stop_trigger = 0;
+ /* If buf_id < HAD_BUF_TYPE_C, ignore */
+ if (buf_id < HAD_BUF_TYPE_C) {
+ intelhaddata->curr_buf = HAD_BUF_TYPE_C;
+ spin_unlock(&intelhaddata->had_spinlock);
+ return retval;
+ }
+ spin_unlock(&intelhaddata->had_spinlock);
+ i = buf_id;
+ buf_addr = virt_to_phys(intelhaddata->flat_data);
+ /* Program the buf registers with addr and len */
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR + (i * HAD_REG_WIDTH),
+ buf_addr | BIT(0) | BIT(1));
+ intelhaddata->reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH + (i * HAD_REG_WIDTH),
+ (MAX_SZ_ZERO_BUF));
+
+ intelhaddata->buf_info[i].buf_addr = buf_addr;
+ intelhaddata->buf_info[i].buf_size = MAX_SZ_ZERO_BUF;
+ intelhaddata->buf_info[i].is_valid = true;
+ if (buf_id == HAD_BUF_TYPE_C)
+ intelhaddata->curr_buf = HAD_BUF_TYPE_D;
+ else
+ intelhaddata->curr_buf = HAD_BUF_TYPE_C;
+ pr_debug("buf[%d] addr=%#x and size=%d\n", i,
+ intelhaddata->buf_info[i].buf_addr,
+ intelhaddata->buf_info[i].buf_size);
+ return retval;
+ }
+
+ /* In case of actual data, report buffer_done to above ALSA layer */
+ if (pcm_active) {
+ intelhaddata->stream_info.buffer_rendered += buf_size;
+ stream->period_elapsed(stream->had_substream);
+ }
+
+ intelhaddata->buf_info[buf_id].is_valid = true;
+ if (intelhaddata->valid_buf_cnt-1 == buf_id) {
+ if (pcm_active)
+ intelhaddata->curr_buf = HAD_BUF_TYPE_A;
+ else /* Use only silence buffers C & D */
+ intelhaddata->curr_buf = HAD_BUF_TYPE_C;
+ } else
+ intelhaddata->curr_buf++;
+
+ if (intelhaddata->send_data)
+ return retval;
+
+ if (flag_en_allbufs &&
+ intelhaddata->curr_buf == HAD_BUF_TYPE_A) {
+ pr_debug("special case:enable all bufs\n");
+ for (i = 0; i < intelhaddata->valid_buf_cnt; i++) {
+ pr_debug("Enabling buf[%d]\n", i);
+ reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH +
+ (i * HAD_REG_WIDTH), buf_size);
+ reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR+(i * HAD_REG_WIDTH),
+ intelhaddata->buf_info[i].buf_addr |
+ BIT(0) | BIT(1));
+ }
+ flag_en_allbufs = 0;
+ } else {
+ /*Reprogram the registers with addr and length*/
+ reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH +
+ (buf_id * HAD_REG_WIDTH), buf_size);
+ reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR+(buf_id * HAD_REG_WIDTH),
+ intelhaddata->buf_info[buf_id].buf_addr|
+ BIT(0) | BIT(1));
+ }
+
+ return retval;
+}
+
+int had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
+{
+ int caps, i = 0, retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ struct pcm_stream_info *stream;
+ struct hdmi_audio_registers_ops reg_ops;
+ struct hdmi_audio_query_set_ops query_ops;
+ u32 hdmi_status;
+ int pcm_active;
+
+ spin_lock(&intelhaddata->had_spinlock);
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ pcm_active = intelhaddata->pcm_active;
+ spin_unlock(&intelhaddata->had_spinlock);
+ reg_ops = intelhaddata->reg_ops;
+ query_ops = intelhaddata->query_ops;
+
+
+ pr_debug("Enter:%s buf_id=%d", __func__, buf_id);
+ stream = &intelhaddata->stream_info;
+ if (intelhaddata->pcm_active) {
+ /* Report UNDERRUN error to above layers */
+ intelhaddata->flag_underrun = 1;
+ stream->period_elapsed(stream->had_substream);
+ } else
+ pr_debug("_UNDERRUN occured during _STOP\n");
+
+ /* Handle Underrun interrupt within Audio Unit */
+ reg_ops.hdmi_audio_write_register(
+ AUD_CONFIG, 0);
+ /* Reset buffer pointers */
+ reg_ops.hdmi_audio_write_register(AUD_HDMI_STATUS, 1);
+ reg_ops.hdmi_audio_write_register(AUD_HDMI_STATUS, 0);
+ if (pcm_active)
+ intelhaddata->curr_buf = HAD_BUF_TYPE_A;
+ else /* Use only silence buffers C & D */
+ intelhaddata->curr_buf = HAD_BUF_TYPE_C;
+
+ /**
+ * The interrupt status 'sticky' bits might not be cleared by
+ * setting '1' to that bit once...
+ */
+ do { /* clear bit30, 31 AUD_HDMI_STATUS */
+ reg_ops.hdmi_audio_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;
+ reg_ops.hdmi_audio_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");
+
+ if (!intelhaddata->pcm_active) {
+ /* In case _STOP=1, send silence data */
+ caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
+ retval = query_ops.hdmi_audio_set_caps(
+ HAD_SET_ENABLE_AUDIO_INT, &caps);
+ retval = query_ops.hdmi_audio_set_caps(
+ HAD_SET_ENABLE_AUDIO, NULL);
+
+ retval = snd_intelhad_configure_silence(intelhaddata);
+ retval = snd_intelhad_start_silence(intelhaddata);
+ }
+
+ return retval;
+}
+
+int had_process_hot_plug(struct snd_intelhad *intelhaddata)
+{
+ int caps, i = 0, retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ u32 buf_size;
+ struct snd_pcm_substream *substream;
+ struct hdmi_audio_registers_ops reg_ops;
+ struct hdmi_audio_query_set_ops query_ops;
+
+ spin_lock(&intelhaddata->had_spinlock);
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ spin_unlock(&intelhaddata->had_spinlock);
+ substream = intelhaddata->stream_info.had_substream;
+ reg_ops = intelhaddata->reg_ops;
+ query_ops = intelhaddata->query_ops;
+
+
+ pr_debug("Enter:%s", __func__);
+ mutex_lock(&intelhaddata->had_lock);
+ intelhaddata->drv_status = HAD_DRV_CONNECTED;
+ buf_size = intelhaddata->buf_info[buf_id].buf_size;
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->send_data = 0;
+ caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
+ retval = query_ops.hdmi_audio_set_caps(
+ HAD_SET_ENABLE_AUDIO_INT, &caps);
+ retval = query_ops.hdmi_audio_set_caps(
+ HAD_SET_ENABLE_AUDIO, NULL);
+
+ if (!intelhaddata->stream_info.str_id) {
+ retval = snd_intelhad_configure_silence(intelhaddata);
+ retval = snd_intelhad_start_silence(intelhaddata);
+ mutex_unlock(&intelhaddata->had_lock);
+ pr_err("nothing to do in hot plug\n");
+ return retval;
+ }
+
+ mutex_unlock(&intelhaddata->had_lock);
+ cancel_delayed_work(&intelhaddata->dummy_audio);
+
+ /* Reset HW within Audio unit */
+ reg_ops.hdmi_audio_write_register(
+ AUD_CONFIG, 0);
+ reg_ops.hdmi_audio_write_register(
+ AUD_HDMI_STATUS, 1);
+ reg_ops.hdmi_audio_write_register(
+ AUD_HDMI_STATUS, 0);
+
+ /*Reprogram the registers with addr and length*/
+ for (i = buf_id; i < intelhaddata->valid_buf_cnt; i++) {
+ pr_debug("Enabling buf[%d]\n", i);
+ reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_LENGTH +
+ (buf_id * HAD_REG_WIDTH), buf_size);
+ reg_ops.hdmi_audio_write_register(
+ AUD_BUF_A_ADDR+(buf_id * HAD_REG_WIDTH),
+ intelhaddata->buf_info[buf_id].buf_addr|
+ BIT(0) | BIT(1));
+ }
+ if (substream) { /* continue transfer */
+ snd_intelhad_init_audio_ctrl(substream,
+ intelhaddata, 0);
+ hdmi_audio_mode_change(substream);
+ }
+ flag_en_allbufs = 1;
+
+
+ return retval;
+}
+
+int had_process_hot_unplug(struct snd_intelhad *intelhaddata)
+{
+ int caps, retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ u32 buf_size;
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ struct hdmi_audio_query_set_ops query_ops;
+ u32 msecs, rate, channels;
+
+ spin_lock(&intelhaddata->had_spinlock);
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ spin_unlock(&intelhaddata->had_spinlock);
+
+
+ substream = intelhaddata->stream_info.had_substream;
+ query_ops = intelhaddata->query_ops;
+ pr_debug("Enter:%s", __func__);
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->stream_info.str_id) {
+ buf_size = intelhaddata->buf_info[buf_id].buf_size;
+ /* In case substream is active, start reporting
+ * dummy buffer_done interrupts to above ALSA layer.
+ */
+ if (substream) { /* substream is active */
+ runtime = substream->runtime;
+ rate = runtime->rate;
+ channels = runtime->channels;
+ msecs = (buf_size*1000)/(rate*channels*4);
+ intelhaddata->timer = msecs_to_jiffies(msecs);
+ intelhaddata->send_data = 1;
+ schedule_delayed_work(
+ &intelhaddata->dummy_audio,
+ intelhaddata->timer);
+ }
+ } else {
+ caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
+ retval = query_ops.hdmi_audio_set_caps(
+ HAD_SET_DISABLE_AUDIO_INT, &caps);
+ retval = query_ops.hdmi_audio_set_caps(
+ HAD_SET_DISABLE_AUDIO, NULL);
+ retval = snd_intelhad_stop_silence(intelhaddata);
+ }
+ intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
+ mutex_unlock(&intelhaddata->had_lock);
+
+ return retval;
+}
+
+/**
+ * had_event_handler - Call back function to handle events
+ *
+ * @event_type: Event type to handle
+ * @data: data related to the event_type
+ *
+ * This function is invoked to handle HDMI events from client driver.
+ */
+int had_event_handler(enum had_event_type event_type, void *data)
+{
+ int retval = 0;
+ struct snd_intelhad *intelhaddata = data;
+ enum intel_had_aud_buf_type buf_id;
+ struct snd_pcm_substream *substream;
+ struct hdmi_audio_registers_ops reg_ops;
+ struct hdmi_audio_query_set_ops query_ops;
+
+ spin_lock(&intelhaddata->had_spinlock);
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ spin_unlock(&intelhaddata->had_spinlock);
+
+ substream = intelhaddata->stream_info.had_substream;
+ reg_ops = intelhaddata->reg_ops;
+ query_ops = intelhaddata->query_ops;
+ switch (event_type) {
+ case HAD_EVENT_AUDIO_BUFFER_DONE:
+ retval = had_process_buffer_done(intelhaddata);
+ break;
+
+ case HAD_EVENT_AUDIO_BUFFER_UNDERRUN:
+ retval = had_process_buffer_underrun(intelhaddata);
+ break;
+
+ case HAD_EVENT_HOT_PLUG:
+ retval = had_process_hot_plug(intelhaddata);
+ break;
+
+ case HAD_EVENT_HOT_UNPLUG:
+ retval = had_process_hot_unplug(intelhaddata);
+ break;
+
+ case HAD_EVENT_MODE_CHANGING:
+ pr_debug(" called _event_handler with _MODE_CHANGE event\n");
+ mutex_lock(&intelhaddata->had_lock);
+ if (intelhaddata->stream_info.str_id && substream)
+ retval = hdmi_audio_mode_change(substream);
+ mutex_unlock(&intelhaddata->had_lock);
+ break;
+
+ default:
+ pr_debug("error un-handled event !!\n");
+ retval = -EINVAL;
+ break;
+
+ }
+ return retval;
+}
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff