@@ -134,3 +134,11 @@ config AC97_BUS
sound subsystem and other function drivers completely unrelated to
sound although they're sharing the AC97 bus. Concerned drivers
should "select" this.
+
+config SUPPORT_HDMI
+ bool "SUPPORT_HDMI"
+ depends on DRM_I915
+ default n
+ help
+ Choose this option to support HDMI.
+
@@ -8,6 +8,7 @@ obj-$(CONFIG_DMASOUND) += oss/
obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \
firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/
obj-$(CONFIG_SND_AOA) += aoa/
+obj-$(CONFIG_SUPPORT_HDMI) += hdmi_audio/
# This one must be compilable even if sound is configured out
obj-$(CONFIG_AC97_BUS) += ac97_bus.o
new file mode 100644
@@ -0,0 +1,9 @@
+DRIVER_NAME := hdmi_audio
+
+ccflags-y += -Idrivers/gpu/drm/i915
+
+$(DRIVER_NAME)-objs += \
+ intel_mid_hdmi_audio.o \
+ intel_mid_hdmi_audio_if.o
+
+obj-m += $(DRIVER_NAME).o
new file mode 100644
@@ -0,0 +1,2029 @@
+/*
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * 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 <linux/module.h>
+#include <linux/acpi.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_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 DMA_FIFO_THRESHOLD 0x7
+#define BYTES_PER_WORD 0x4
+
+/* Sampling rate as per IEC60958 Ver 3 */
+#define CH_STATUS_MAP_32KHZ 0x3
+#define CH_STATUS_MAP_44KHZ 0x0
+#define CH_STATUS_MAP_48KHZ 0x2
+#define CH_STATUS_MAP_88KHZ 0x8
+#define CH_STATUS_MAP_96KHZ 0xA
+#define CH_STATUS_MAP_176KHZ 0xC
+#define CH_STATUS_MAP_192KHZ 0xE
+
+#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
+#define SWAP_LFE_CENTER 0x00fac4c8
+#define AUD_CONFIG_CH_MASK_V2 0x70
+
+/*
+ * 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 */
+
+inline 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;
+ }
+
+ /* Check for device presence -HW state */
+ if (!ospm_power_is_hw_on(OSPM_DISPLAY_ISLAND)) {
+ pr_err("%s:Device not connected\n", __func__);
+ /* HOT_UNPLUG event can be sent to
+ * maintain correct state within HAD
+ * had_event_handler(HAD_EVENT_HOT_UNPLUG, intelhaddata);
+ * Drop all acuired locks before executing this.
+ */
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+inline 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;
+}
+
+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;
+}
+
+inline int had_read_register(uint32_t offset, uint32_t *data)
+{
+ int retval;
+ struct snd_intelhad *intelhaddata = had_data;
+ u32 base_addr = intelhaddata->audio_reg_base;
+
+ retval = had_get_hwstate(intelhaddata);
+ if (!retval)
+ retval = intelhaddata->reg_ops.hdmi_audio_read_register(
+ base_addr + offset, data);
+
+ return retval;
+}
+
+inline int had_write_register(uint32_t offset, uint32_t data)
+{
+ int retval;
+ struct snd_intelhad *intelhaddata = had_data;
+ u32 base_addr = intelhaddata->audio_reg_base;
+
+ retval = had_get_hwstate(intelhaddata);
+ if (!retval)
+ retval = intelhaddata->reg_ops.hdmi_audio_write_register(
+ base_addr + offset, data);
+
+ return retval;
+}
+
+inline int had_read_modify(uint32_t offset, uint32_t data, uint32_t mask)
+{
+ int retval;
+ struct snd_intelhad *intelhaddata = had_data;
+ u32 base_addr = intelhaddata->audio_reg_base;
+
+ retval = had_get_hwstate(intelhaddata);
+ if (!retval)
+ retval = intelhaddata->reg_ops.hdmi_audio_read_modify(
+ base_addr + offset, data, mask);
+
+ return retval;
+}
+/**
+ * had_read_modify_aud_config_v2 - Specific 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
+ *
+ */
+inline int had_read_modify_aud_config_v2(struct snd_pcm_substream *substream,
+ uint32_t data, uint32_t 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);
+}
+
+/**
+ * snd_intelhad_enable_audio_v1 - to enable audio
+ *
+ * @substream: Current substream or NULL if no active substream.
+ * @enable: 1 if audio is to be enabled; 0 if audio is to be disabled.
+ *
+ */
+static void snd_intelhad_enable_audio_v1(struct snd_pcm_substream *substream,
+ u8 enable)
+{
+ had_read_modify(AUD_CONFIG, enable, BIT(0));
+}
+
+/**
+ * snd_intelhad_enable_audio_v2 - to enable audio
+ *
+ * @substream: Current substream or NULL if no active substream.
+ * @enable: 1 if audio is to be enabled; 0 if audio is to be disabled.
+ */
+static void snd_intelhad_enable_audio_v2(struct snd_pcm_substream *substream,
+ u8 enable)
+{
+ had_read_modify_aud_config_v2(substream, enable, BIT(0));
+}
+
+/**
+ * snd_intelhad_reset_audio_v1 - to reset audio subsystem
+ *
+ * @reset: 1 to reset audio; 0 to bring audio out of reset.
+ *
+ */
+static void snd_intelhad_reset_audio_v1(u8 reset)
+{
+ had_write_register(AUD_HDMI_STATUS, reset);
+}
+
+/**
+ * snd_intelhad_reset_audio_v2 - to reset audio subsystem
+ *
+ * @reset: 1 to reset audio; 0 to bring audio out of reset.
+ *
+ */
+static void snd_intelhad_reset_audio_v2(u8 reset)
+{
+ had_write_register(AUD_HDMI_STATUS_v2, reset);
+}
+
+/**
+ * had_prog_status_reg - to initialize audio channel status registers
+ *
+ * @substream:substream for which the prepare function is called
+ * @intelhaddata:substream private data
+ *
+ * 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_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;
+ 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;
+}
+
+/**
+ * snd_intelhad_prog_audio_ctrl_v2 - to initialize audio
+ * registers and buffer 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_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;
+
+ cfg_val.cfg_regx_v2.val_bit = 1;
+ had_write_register(AUD_CONFIG, cfg_val.cfg_regval);
+ return 0;
+}
+
+/**
+ * snd_intelhad_prog_audio_ctrl_v1 - to initialize audio
+ * registers and buffer 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_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;
+
+ }
+
+ cfg_val.cfg_regx.val_bit = 1;
+ 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;
+ uint8_t eld_high, eld_high_mask = 0xF0;
+ uint8_t high_msb;
+
+ chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
+ if (chmap == NULL) {
+ pr_err("kzalloc returned null in %s\n", __func__);
+ 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))
+ 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;
+}
+
+#ifndef USE_ALSA_DEFAULT_TLV
+static int had_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+ unsigned int size, unsigned int __user *tlv)
+{
+ 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;
+
+ /* TODO: Fix for query channel map */
+ return -EPERM;
+}
+#endif
+
+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_chmap_ctl_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ /* TODO: Get channel map and set swap register */
+ return -EPERM;
+}
+
+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->kctl->put = had_chmap_ctl_put;
+#ifndef USE_ALSA_DEFAULT_TLV
+ intelhaddata->kctl->tlv.c = had_chmap_ctl_tlv;
+#endif
+ 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;
+}
+
+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_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++;
+ hdmi_status &= ~AUD_CONFIG_MASK_UNDERRUN;
+ 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);
+
+ /*
+ * 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");
+ retval = -ENODEV;
+ goto exit_put_handle;
+ }
+
+ if (had_get_hwstate(intelhaddata)) {
+ pr_err("%s: HDMI cable plugged-out\n", __func__);
+ retval = -ENODEV;
+ goto exit_ospm_handle;
+ }
+
+ /* Check, if device already in use */
+ if (runtime->private_data) {
+ pr_err("Device already in use\n");
+ retval = -EBUSY;
+ goto exit_ospm_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_ospm_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_ospm_handle:
+ ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
+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;
+ kfree(runtime->private_data);
+ runtime->private_data = NULL;
+ ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
+ 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");
+
+ 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 */
+ 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;
+
+ 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);
+ 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__);
+ 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 = 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;
+
+ /* 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;
+ }
+
+ 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);
+ 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_SAMPLING_FREQ, &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 = {
+ };
+
+ 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);
+
+ 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
+ */
+static int 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;
+ struct had_pvt_data *had_stream;
+
+ pr_debug("Enter %s\n", __func__);
+
+ pr_debug("hdmi_audio_probe dma_mask: %d\n", devptr->dev.dma_mask);
+
+ /* 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_stream = kzalloc(sizeof(*had_stream), GFP_KERNEL);
+ if (!had_stream) {
+ pr_err("mem alloc failed\n");
+ 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;
+ /* 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 : %d\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;
+ /* PIPE A is used for HDMI*/
+ intelhaddata->audio_reg_base = 0x65000;
+ 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.
+ */
+static int hdmi_audio_remove(struct platform_device *devptr)
+{
+ 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;
+}
+
+static int had_pm_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int had_pm_runtime_resume(struct device *dev)
+{
+ return 0;
+}
+
+static int had_pm_runtime_idle(struct device *dev)
+{
+ return pm_schedule_suspend(dev, HAD_SUSPEND_DELAY);
+}
+
+const struct dev_pm_ops had_pm_ops = {
+ .runtime_idle = had_pm_runtime_idle,
+ .runtime_suspend = had_pm_runtime_suspend,
+ .runtime_resume = had_pm_runtime_resume,
+};
+
+static const struct acpi_device_id had_acpi_ids[] = {
+ { "HAD0F28", 0 },
+ { "HAD022A8", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, had_acpi_ids);
+
+static struct platform_driver had_driver = {
+ .probe = hdmi_audio_probe,
+ .remove = hdmi_audio_remove,
+ .suspend = NULL,
+ .resume = NULL,
+ .driver = {
+ .name = HDMI_AUDIO_DRIVER,
+#ifdef CONFIG_PM
+ .pm = &had_pm_ops,
+#endif
+ .acpi_match_table = ACPI_PTR(had_acpi_ids),
+ },
+};
+
+/*
+* 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);
new file mode 100644
@@ -0,0 +1,740 @@
+/*
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * 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 <linux/pm_runtime.h>
+#include <sound/asoundef.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <hdmi_audio_if.h>
+
+#define OSPM_DISPLAY_ISLAND 0x40
+
+typedef enum _UHBUsage {
+ OSPM_UHB_ONLY_IF_ON = 0,
+ OSPM_UHB_FORCE_POWER_ON,
+} UHBUsage;
+
+bool ospm_power_using_hw_begin(int hw_island, UHBUsage usage);
+void ospm_power_using_hw_end(int hw_island);
+
+/*
+ * Use this function to do an instantaneous check for if the hw is on.
+ * Only use this in cases where you know the g_state_change_mutex
+ * is already held such as in irq install/uninstall and you need to
+ * prevent a deadlock situation. Otherwise use ospm_power_using_hw_begin().
+ */
+bool ospm_power_is_hw_on(int hw_islands);
+
+#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
+
+/* Assume 192KHz, 8channel, 25msec period */
+#define HAD_MAX_BUFFER (600*1024)
+#define HAD_MIN_BUFFER (32*1024)
+#define HAD_MAX_PERIODS 4
+#define HAD_MIN_PERIODS 4
+#define HAD_MAX_PERIOD_BYTES (HAD_MAX_BUFFER/HAD_MIN_PERIODS)
+#define HAD_MIN_PERIOD_BYTES 256
+#define HAD_FIFO_SIZE 0 /* fifo not being used */
+#define MAX_SPEAKERS 8
+/* TODO: Add own tlv when channel map is ported for user space */
+#define USE_ALSA_DEFAULT_TLV
+
+#define AUD_SAMPLE_RATE_32 32000
+#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 192000
+
+#define HAD_MIN_RATE AUD_SAMPLE_RATE_32
+#define HAD_MAX_RATE AUD_SAMPLE_RATE_192
+
+#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 HAD_SUSPEND_DELAY 1000
+
+#define OTM_HDMI_ELD_SIZE 84
+
+typedef union {
+ uint8_t eld_data[OTM_HDMI_ELD_SIZE];
+ #pragma pack(1)
+ struct {
+ /* Byte[0] = ELD Version Number */
+ union {
+ uint8_t byte0;
+ struct {
+ uint8_t reserved:3; /* Reserf */
+ uint8_t eld_ver:5; /* ELD Version Number */
+ /* 00000b - reserved
+ * 00001b - first rev, obsoleted
+ * 00010b - version 2, supporting CEA version 861D or below
+ * 00011b:11111b - reserved
+ * for future
+ */
+ };
+ };
+
+ /* Byte[1] = Vendor Version Field */
+ union {
+ uint8_t vendor_version;
+ struct {
+ uint8_t reserved1:3;
+ uint8_t veld_ver:5; /* Version number of the ELD
+ * extension. This value is
+ * provisioned and unique to
+ * each vendor.
+ */
+ };
+ };
+
+ /* Byte[2] = Baseline Length field */
+ uint8_t baseline_eld_length; /* Length of the Baseline structure
+ * divided by Four.
+ */
+
+ /* Byte [3] = Reserved for future use */
+ uint8_t byte3;
+
+ /* Starting of the BaseLine EELD structure
+ * Byte[4] = Monitor Name Length
+ */
+ union {
+ uint8_t byte4;
+ struct {
+ uint8_t mnl:5;
+ uint8_t cea_edid_rev_id:3;
+ };
+ };
+
+ /* Byte[5] = Capabilities */
+ union {
+ uint8_t capabilities;
+ struct {
+ uint8_t hdcp:1; /* HDCP support */
+ uint8_t ai_support:1; /* AI support */
+ uint8_t connection_type:2; /* Connection type
+ * 00 - HDMI
+ * 01 - DP
+ * 10 -11 Reserved
+ * for future
+ * connection types
+ */
+ uint8_t sadc:4; /* Indicates number of 3 bytes
+ * Short Audio Descriptors.
+ */
+ };
+ };
+
+ /* Byte[6] = Audio Synch Delay */
+ uint8_t audio_synch_delay; /* Amount of time reported by the
+ * sink that the video trails audio
+ * in milliseconds.
+ */
+
+ /* Byte[7] = Speaker Allocation Block */
+ union {
+ uint8_t speaker_allocation_block;
+ struct {
+ uint8_t flr:1; /*Front Left and Right channels*/
+ uint8_t lfe:1; /*Low Frequency Effect channel*/
+ uint8_t fc:1; /*Center transmission channel*/
+ uint8_t rlr:1; /*Rear Left and Right channels*/
+ uint8_t rc:1; /*Rear Center channel*/
+ uint8_t flrc:1; /*Front left and Right of Center
+ *transmission channels
+ */
+ uint8_t rlrc:1; /*Rear left and Right of Center
+ *transmission channels
+ */
+ uint8_t reserved3:1; /* Reserved */
+ };
+ };
+
+ /* Byte[8 - 15] - 8 Byte port identification value */
+ uint8_t port_id_value[8];
+
+ /* Byte[16 - 17] - 2 Byte Manufacturer ID */
+ uint8_t manufacturer_id[2];
+
+ /* Byte[18 - 19] - 2 Byte Product ID */
+ uint8_t product_id[2];
+
+ /* Byte [20-83] - 64 Bytes of BaseLine Data */
+ uint8_t mn_sand_sads[64]; /* This will include
+ * - ASCII string of Monitor name
+ * - List of 3 byte SADs
+ * - Zero padding
+ */
+
+ /* Vendor ELD Block should continue here!
+ * No Vendor ELD block defined as of now.
+ */
+ };
+ #pragma pack()
+} otm_hdmi_eld_t;
+
+/**
+ * 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_status_stream - HAD stream states
+ */
+enum had_status_stream {
+ HAD_INIT = 0,
+ HAD_RUNNING_STREAM,
+};
+
+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_offset_v1 {
+ AUD_CONFIG = 0x0,
+ AUD_CH_STATUS_0 = 0x08,
+ AUD_CH_STATUS_1 = 0x0C,
+ AUD_HDMI_CTS = 0x10,
+ AUD_N_ENABLE = 0x14,
+ AUD_SAMPLE_RATE = 0x18,
+ AUD_BUF_CONFIG = 0x20,
+ AUD_BUF_CH_SWAP = 0x24,
+ AUD_BUF_A_ADDR = 0x40,
+ AUD_BUF_A_LENGTH = 0x44,
+ AUD_BUF_B_ADDR = 0x48,
+ AUD_BUF_B_LENGTH = 0x4c,
+ AUD_BUF_C_ADDR = 0x50,
+ AUD_BUF_C_LENGTH = 0x54,
+ AUD_BUF_D_ADDR = 0x58,
+ AUD_BUF_D_LENGTH = 0x5c,
+ AUD_CNTL_ST = 0x60,
+ AUD_HDMI_STATUS = 0x68,
+ AUD_HDMIW_INFOFR = 0x114,
+};
+
+/*
+ * Delta changes in HDMI controller register offsets
+ * compare to v1 version
+ */
+
+enum hdmi_ctrl_reg_offset_v2 {
+ AUD_HDMI_STATUS_v2 = 0x64,
+ AUD_HDMIW_INFOFR_v2 = 0x68,
+};
+
+/*
+ * CEA speaker placement:
+ *
+ * FL FLC FC FRC FR
+ *
+ * LFE
+ *
+ * RL RLC RC RRC RR
+ *
+ * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
+ * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
+ */
+enum cea_speaker_placement {
+ FL = (1 << 0), /* Front Left */
+ FC = (1 << 1), /* Front Center */
+ FR = (1 << 2), /* Front Right */
+ FLC = (1 << 3), /* Front Left Center */
+ FRC = (1 << 4), /* Front Right Center */
+ RL = (1 << 5), /* Rear Left */
+ RC = (1 << 6), /* Rear Center */
+ RR = (1 << 7), /* Rear Right */
+ RLC = (1 << 8), /* Rear Left Center */
+ RRC = (1 << 9), /* Rear Right Center */
+ LFE = (1 << 10), /* Low Frequency Effect */
+};
+
+struct cea_channel_speaker_allocation {
+ int ca_index;
+ int speakers[8];
+
+ /* derived values, just for convenience */
+ int channels;
+ int spk_mask;
+};
+
+struct channel_map_table {
+ unsigned char map; /* ALSA API channel map position */
+ unsigned char cea_slot; /* CEA slot value */
+ int spk_mask; /* speaker position bit mask */
+};
+
+/**
+ * union aud_cfg - Audio configuration
+ *
+ * @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;
+ struct {
+ u32 aud_en:1;
+ u32 layout:1;
+ u32 fmt:2;
+ u32 num_ch:3;
+ u32 set:1;
+ u32 flat:1;
+ u32 val_bit:1;
+ u32 user_bit:1;
+ u32 underrun:1;
+ u32 packet_mode:1;
+ u32 left_align:1;
+ u32 bogus_sample:1;
+ u32 dp_modei:1;
+ u32 rsvd:16;
+ } cfg_regx_v2;
+ u32 cfg_regval;
+};
+
+/**
+ * union aud_ch_status_0 - Audio Channel Status 0 Attributes
+ *
+ * @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
+ *
+ * @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
+ *
+ * @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;
+ struct {
+ u32 cts_val:24;
+ u32 en_cts_prog:1;
+ u32 rsvd:7;
+ } cts_regx_v2;
+ u32 cts_regval;
+};
+
+/**
+ * union aud_hdmi_n_enable - N register
+ *
+ * @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;
+ struct {
+ u32 n_val:24;
+ u32 en_n_prog:1;
+ u32 rsvd:7;
+ } n_regx_v2;
+ u32 n_regval;
+};
+
+/**
+ * union aud_buf_config - Audio Buffer configurations
+ *
+ * @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;
+ struct {
+ u32 audio_fifo_watermark:8;
+ u32 dma_fifo_watermark:3;
+ u32 rsvd0:5;
+ u32 aud_delay:8;
+ u32 rsvd1:8;
+ } buf_cfg_regx_v2;
+ u32 buf_cfgval;
+};
+
+/**
+ * union aud_buf_ch_swap - Audio Sample Swapping offset
+ *
+ * @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
+ *
+ * @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
+ *
+ * @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;
+ ssize_t dbg_cum_bytes;
+};
+
+struct had_pvt_data {
+ enum had_status_stream stream_type;
+};
+
+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
+ * @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_spinlock: driver lock
+ * @aes_bits: IEC958 status bits
+ * @buff_done: id of current buffer done intr
+ * @dev: platoform device handle
+ * @kctl: holds kctl ptrs used for channel map
+ * @chmap: holds channel map info
+ * @audio_reg_base: hdmi audio register base offset
+ * @hw_silence: flag indicates SoC support for HW silence/Keep alive
+ * @ops: holds ops functions based on platform
+ */
+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;
+ struct ring_buf_info buf_info[HAD_NUM_OF_RING_BUFS];
+ struct pcm_stream_info stream_info;
+ otm_hdmi_eld_t eeld;
+ enum intel_had_aud_buf_type curr_buf;
+ int valid_buf_cnt;
+ unsigned int aes_bits;
+ int flag_underrun;
+ struct had_pvt_data *private_data;
+ spinlock_t had_spinlock;
+ enum intel_had_aud_buf_type buff_done;
+ struct device *dev;
+ struct snd_kcontrol *kctl;
+ struct snd_pcm_chmap *chmap;
+ unsigned int audio_reg_base;
+ bool hw_silence;
+ struct had_ops *ops;
+};
+
+struct had_ops {
+ void (*enable_audio)(struct snd_pcm_substream *substream,
+ u8 enable);
+ void (*reset_audio)(u8 reset);
+ int (*prog_n)(u32 aud_samp_freq, u32 *n_param,
+ struct snd_intelhad *intelhaddata);
+ void (*prog_cts)(u32 aud_samp_freq, u32 tmds, u32 n_param,
+ struct snd_intelhad *intelhaddata);
+ int (*audio_ctrl)(struct snd_pcm_substream *substream,
+ struct snd_intelhad *intelhaddata);
+ void (*prog_dip)(struct snd_pcm_substream *substream,
+ struct snd_intelhad *intelhaddata);
+ void (*handle_underrun)(struct snd_intelhad *intelhaddata);
+};
+
+
+int had_event_handler(enum had_event_type event_type, void *data);
+
+int hdmi_audio_query(void *drv_data, hdmi_audio_event_t event);
+int hdmi_audio_suspend(void *drv_data, hdmi_audio_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_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);
+int snd_intelhad_invd_buffer(int start, int end);
+inline int snd_intelhad_read_len(struct snd_intelhad *intelhaddata);
+void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata);
+
+/* Register access functions */
+inline int had_get_hwstate(struct snd_intelhad *intelhaddata);
+inline int had_get_caps(enum had_caps_list query_element, void *capabilties);
+inline int had_set_caps(enum had_caps_list set_element, void *capabilties);
+inline int had_read_register(uint32_t reg_addr, uint32_t *data);
+inline int had_write_register(uint32_t reg_addr, uint32_t data);
+inline int had_read_modify(uint32_t reg_addr, uint32_t data, uint32_t mask);
+#endif
new file mode 100644
@@ -0,0 +1,514 @@
+/*
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * 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"
+
+
+/**
+ * hdmi_audio_query - hdmi audio query function
+ *
+ *@haddata: pointer to HAD private data
+ *@event: audio event for which this method is invoked
+ *
+ * This function is called by client driver to query the
+ * hdmi audio.
+ */
+int hdmi_audio_query(void *haddata, hdmi_audio_event_t event)
+{
+ struct snd_pcm_substream *substream = NULL;
+ struct had_pvt_data *had_stream;
+ unsigned long flag_irqs;
+ struct snd_intelhad *intelhaddata = (struct snd_intelhad *)haddata;
+
+ if (intelhaddata->stream_info.had_substream)
+ substream = intelhaddata->stream_info.had_substream;
+ had_stream = intelhaddata->private_data;
+ switch (event.type) {
+ case HAD_EVENT_QUERY_IS_AUDIO_BUSY:
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+
+ if ((had_stream->stream_type == HAD_RUNNING_STREAM) ||
+ substream) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock,
+ flag_irqs);
+ pr_debug("Audio stream active\n");
+ return -EBUSY;
+ }
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ break;
+
+ case HAD_EVENT_QUERY_IS_AUDIO_SUSPENDED:
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_SUSPENDED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock,
+ flag_irqs);
+ pr_debug("Audio is suspended\n");
+ return 1;
+ }
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ break;
+
+ default:
+ pr_debug("error un-handled event !!\n");
+ return -EINVAL;
+ break;
+
+ }
+
+ return 0;
+}
+
+/**
+ * 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, hdmi_audio_event_t event)
+{
+ int caps, retval = 0;
+ struct had_pvt_data *had_stream;
+ unsigned long flag_irqs;
+ struct snd_pcm_substream *substream;
+ struct snd_intelhad *intelhaddata = (struct snd_intelhad *)haddata;
+
+ pr_debug("Enter:%s", __func__);
+
+ had_stream = intelhaddata->private_data;
+ substream = intelhaddata->stream_info.had_substream;
+
+ if (intelhaddata->dev->power.runtime_status != RPM_SUSPENDED) {
+ pr_err("audio stream is active\n");
+ return -EAGAIN;
+ }
+
+
+ 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 retval;
+ }
+
+ if (intelhaddata->drv_status == HAD_DRV_SUSPENDED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_debug("had already suspended\n");
+ return retval;
+ }
+
+ intelhaddata->drv_status = HAD_DRV_SUSPENDED;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ /*
+ * 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);
+ pr_debug("Exit:%s", __func__);
+ 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 (intelhaddata->drv_status != HAD_DRV_SUSPENDED) {
+ 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;
+}
+
+static inline int had_chk_intrmiss(struct snd_intelhad *intelhaddata,
+ enum intel_had_aud_buf_type buf_id)
+{
+ int i, intr_count = 0;
+ enum intel_had_aud_buf_type buff_done;
+ u32 buf_size, buf_addr;
+ struct had_pvt_data *had_stream;
+ unsigned long flag_irqs;
+
+ had_stream = intelhaddata->private_data;
+
+ buff_done = buf_id;
+
+ intr_count = snd_intelhad_read_len(intelhaddata);
+ if (intr_count > 1) {
+ /* In case of active playback */
+ pr_err("Driver detected %d missed buffer done interrupt(s)!!!!\n",
+ (intr_count - 1));
+ if (intr_count > 3)
+ return intr_count;
+
+ buf_id += (intr_count - 1);
+ /* Reprogram registers*/
+ for (i = buff_done; i < buf_id; i++) {
+ int j = i % 4;
+
+ buf_size = intelhaddata->buf_info[j].buf_size;
+ buf_addr = intelhaddata->buf_info[j].buf_addr;
+ had_write_register(AUD_BUF_A_LENGTH +
+ (j * HAD_REG_WIDTH), buf_size);
+ had_write_register(
+ AUD_BUF_A_ADDR+(j * HAD_REG_WIDTH),
+ (buf_addr | BIT(0) | BIT(1)));
+ }
+ buf_id = buf_id % 4;
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ intelhaddata->buff_done = buf_id;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ }
+
+ return intr_count;
+}
+
+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;
+}
+
+int had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
+{
+ int retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ struct pcm_stream_info *stream;
+ struct had_pvt_data *had_stream;
+ enum had_status_stream stream_type;
+ unsigned long flag_irqs;
+ int drv_status;
+
+ had_stream = intelhaddata->private_data;
+ stream = &intelhaddata->stream_info;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ buf_id = intelhaddata->curr_buf;
+ stream_type = had_stream->stream_type;
+ intelhaddata->buff_done = buf_id;
+ drv_status = intelhaddata->drv_status;
+ if (stream_type == HAD_RUNNING_STREAM)
+ intelhaddata->curr_buf = HAD_BUF_TYPE_A;
+
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+
+ pr_debug("Enter:%s buf_id=%d, stream_type=%d\n",
+ __func__, buf_id, stream_type);
+
+ intelhaddata->ops->handle_underrun(intelhaddata);
+
+ if (drv_status == HAD_DRV_DISCONNECTED) {
+ pr_err("%s:Device already disconnected\n", __func__);
+ return retval;
+ }
+
+ if (stream_type == HAD_RUNNING_STREAM) {
+ /* Report UNDERRUN error to above layers */
+ intelhaddata->flag_underrun = 1;
+ stream->period_elapsed(stream->had_substream);
+ }
+
+ return retval;
+}
+
+int had_process_hot_plug(struct snd_intelhad *intelhaddata)
+{
+ int retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ struct snd_pcm_substream *substream;
+ struct had_pvt_data *had_stream;
+ unsigned long flag_irqs;
+
+ pr_debug("Enter:%s", __func__);
+
+ substream = intelhaddata->stream_info.had_substream;
+ had_stream = intelhaddata->private_data;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_CONNECTED) {
+ pr_debug("Device already connected\n");
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ return retval;
+ }
+ buf_id = intelhaddata->curr_buf;
+ intelhaddata->buff_done = buf_id;
+ intelhaddata->drv_status = HAD_DRV_CONNECTED;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+
+ pr_debug("Processing HOT_PLUG, buf_id = %d\n", buf_id);
+
+ /* Safety check */
+ if (substream) {
+ pr_debug("There should not be active PB from ALSA\n");
+ pr_debug("Signifies, cable is plugged-in even before\n");
+ pr_debug("processing snd_pcm_disconnect\n");
+ /* Set runtime->state to hw_params done */
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
+ }
+
+ had_build_channel_allocation_map(intelhaddata);
+
+ return retval;
+}
+
+int had_process_hot_unplug(struct snd_intelhad *intelhaddata)
+{
+ int caps, retval = 0;
+ enum intel_had_aud_buf_type buf_id;
+ struct had_pvt_data *had_stream;
+ unsigned long flag_irqs;
+
+ pr_debug("Enter:%s", __func__);
+
+ had_stream = intelhaddata->private_data;
+ buf_id = intelhaddata->curr_buf;
+
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
+ pr_debug("Device already disconnected\n");
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ return retval;
+ } else {
+ /* Disable Audio */
+ caps = HDMI_AUDIO_BUFFER_DONE;
+ retval = had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps);
+ retval = had_set_caps(HAD_SET_DISABLE_AUDIO, NULL);
+ intelhaddata->ops->enable_audio(intelhaddata->stream_info.had_substream, 0);
+ }
+
+ intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
+ /* Report to above ALSA layer */
+ if (intelhaddata->stream_info.had_substream != NULL) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ pr_debug("%s: unlock -> sending pcm_stop -> lock\n", __func__);
+ snd_pcm_stop(intelhaddata->stream_info.had_substream,
+ SNDRV_PCM_STATE_DISCONNECTED);
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ }
+
+ had_stream->stream_type = HAD_INIT;
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ kfree(intelhaddata->chmap->chmap);
+ intelhaddata->chmap->chmap = NULL;
+ pr_debug("%s: unlocked -> returned\n", __func__);
+
+ 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 had_pvt_data *had_stream;
+ unsigned long flag_irqs;
+
+ buf_id = intelhaddata->curr_buf;
+ had_stream = intelhaddata->private_data;
+
+ /* Switching to a function can drop atomicity even in INTR context.
+ * Thus, a big lock is acquired to maintain atomicity.
+ * This can be optimized later.
+ * Currently, only buffer_done/_underrun executes in INTR context.
+ * Also, locking is implemented separately to avoid real contention
+ * of data(struct intelhaddata) between IRQ/SOFT_IRQ/PROCESS context.
+ */
+ substream = intelhaddata->stream_info.had_substream;
+ 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");
+ /* Process only if stream is active & cable Plugged-in */
+ spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
+ if (intelhaddata->drv_status >= HAD_DRV_DISCONNECTED) {
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock,
+ flag_irqs);
+ break;
+ }
+ spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
+ if ((had_stream->stream_type == HAD_RUNNING_STREAM)
+ && substream)
+ retval = hdmi_audio_mode_change(substream);
+ break;
+
+ default:
+ pr_debug("error un-handled event !!\n");
+ retval = -EINVAL;
+ break;
+
+ }
+ return retval;
+}