Add support interface available on Baytrail and CherryTrail Initial code was downloaded from https://github.com/01org/baytrailaudio/ ...and had the changes to .config stripped and the revert on sound/init.c and printk->pr_debug done by David Henningson Clean-up, port to 4.4 and intel-drm by Pierre Bossart Signed-off-by: David Henningsson <david.henningsson@xxxxxxxxxxxxx> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> --- sound/Kconfig | 8 + sound/Makefile | 1 + sound/hdmi_audio/Makefile | 9 + sound/hdmi_audio/intel_mid_hdmi_audio.c | 2029 ++++++++++++++++++++++++++++ sound/hdmi_audio/intel_mid_hdmi_audio.h | 740 ++++++++++ sound/hdmi_audio/intel_mid_hdmi_audio_if.c | 514 +++++++ 6 files changed, 3301 insertions(+) create mode 100644 sound/hdmi_audio/Makefile create mode 100644 sound/hdmi_audio/intel_mid_hdmi_audio.c create mode 100644 sound/hdmi_audio/intel_mid_hdmi_audio.h create mode 100644 sound/hdmi_audio/intel_mid_hdmi_audio_if.c diff --git a/sound/Kconfig b/sound/Kconfig index 5a240e0..75c679e 100644 --- a/sound/Kconfig +++ b/sound/Kconfig @@ -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. + diff --git a/sound/Makefile b/sound/Makefile index 7732070..f2c5e82 100644 --- a/sound/Makefile +++ b/sound/Makefile @@ -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-$(CONFIG_AC97_BUS) += ac97_bus.o diff --git a/sound/hdmi_audio/Makefile b/sound/hdmi_audio/Makefile new file mode 100644 index 0000000..b28eb3b --- /dev/null +++ b/sound/hdmi_audio/Makefile @@ -0,0 +1,9 @@ +DRIVER_NAME := hdmi_audio + +ccflags-y += -Idrivers/gpu/drm/i915 + +$(DRIVER_NAME)-objs += \ + intel_mid_hdmi_audio.o \ + intel_mid_hdmi_audio_if.o + +obj-m += $(DRIVER_NAME).o diff --git a/sound/hdmi_audio/intel_mid_hdmi_audio.c b/sound/hdmi_audio/intel_mid_hdmi_audio.c new file mode 100644 index 0000000..f397435 --- /dev/null +++ b/sound/hdmi_audio/intel_mid_hdmi_audio.c @@ -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@xxxxxxxxx> + * Ramesh Babu K V <ramesh.babu@xxxxxxxxx> + * Vaibhav Agarwal <vaibhav.agarwal@xxxxxxxxx> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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@xxxxxxxxx>"); +MODULE_AUTHOR("Ramesh Babu K V <ramesh.babu@xxxxxxxxx>"); +MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@xxxxxxxxx>"); +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); diff --git a/sound/hdmi_audio/intel_mid_hdmi_audio.h b/sound/hdmi_audio/intel_mid_hdmi_audio.h new file mode 100644 index 0000000..7c54b97 --- /dev/null +++ b/sound/hdmi_audio/intel_mid_hdmi_audio.h @@ -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@xxxxxxxxx> + * Ramesh Babu K V <ramesh.babu@xxxxxxxxx> + * Vaibhav Agarwal <vaibhav.agarwal@xxxxxxxxx> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 diff --git a/sound/hdmi_audio/intel_mid_hdmi_audio_if.c b/sound/hdmi_audio/intel_mid_hdmi_audio_if.c new file mode 100644 index 0000000..9631642 --- /dev/null +++ b/sound/hdmi_audio/intel_mid_hdmi_audio_if.c @@ -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@xxxxxxxxx> + * Ramesh Babu K V <ramesh.babu@xxxxxxxxx> + * Vaibhav Agarwal <vaibhav.agarwal@xxxxxxxxx> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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; +} -- 1.9.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
