config SND_SOC_FSL_UTILS
tristate
+config SND_SOC_FSL_HDMI
+ tristate
+
config SND_SOC_IMX_PCM_DMA
tristate
select SND_SOC_GENERIC_DMAENGINE_PCM
tristate
select FIQ
+config SND_SOC_IMX_HDMI_DMA
+ bool
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select SND_SOC_IMX_PCM_DMA
+
comment "SoC Audio support for Freescale i.MX boards:"
config SND_MXC_SOC_WM1133_EV1
select SND_SOC_MC13783
select SND_SOC_IMX_PCM_DMA
+config SND_SOC_IMX_HDMI
+ tristate "SoC Audio support for i.MX boards with HDMI port"
+ depends on MFD_MXC_HDMI
+ select SND_SOC_IMX_HDMI_DMA
+ select SND_SOC_FSL_HDMI
+ select SND_SOC_HDMI_CODEC
+ help
+ SoC Audio support for i.MX boards with HDMI audio
+ Say Y if you want to add support for SoC audio on an i.MX board with
+ IMX HDMI.
+
endif # SND_IMX_SOC
endmenu
snd-soc-fsl-esai-objs := fsl_esai.o
snd-soc-fsl-utils-objs := fsl_utils.o
snd-soc-fsl-dma-objs := fsl_dma.o
+snd-soc-fsl-hdmi-objs := fsl_hdmi.o
obj-$(CONFIG_SND_SOC_FSL_ASRC) += snd-soc-fsl-asrc.o
obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o
obj-$(CONFIG_SND_SOC_FSL_SSI) += snd-soc-fsl-ssi.o
obj-$(CONFIG_SND_SOC_FSL_SPDIF) += snd-soc-fsl-spdif.o
obj-$(CONFIG_SND_SOC_FSL_ESAI) += snd-soc-fsl-esai.o
obj-$(CONFIG_SND_SOC_FSL_UTILS) += snd-soc-fsl-utils.o
+obj-$(CONFIG_SND_SOC_FSL_HDMI) += snd-soc-fsl-hdmi.o
obj-$(CONFIG_SND_SOC_POWERPC_DMA) += snd-soc-fsl-dma.o
# MPC5200 Platform Support
obj-$(CONFIG_SND_SOC_IMX_PCM_FIQ) += imx-pcm-fiq.o
obj-$(CONFIG_SND_SOC_IMX_PCM_DMA) += imx-pcm-dma.o
+obj-$(CONFIG_SND_SOC_IMX_HDMI_DMA) += imx-hdmi-dma.o hdmi_pcm.o
# i.MX Machine Support
snd-soc-eukrea-tlv320-objs := eukrea-tlv320.o
snd-soc-imx-wm8962-objs := imx-wm8962.o
snd-soc-imx-spdif-objs := imx-spdif.o
snd-soc-imx-mc13783-objs := imx-mc13783.o
+snd-soc-imx-hdmi-objs := imx-hdmi.o
obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
+obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
+
+AFLAGS_hdmi_pcm.o := -march=armv7-a -mtune=cortex-a9 -mfpu=neon -mfloat-abi=softfp
--- /dev/null
+/*
+ * ALSA SoC HDMI Audio Layer for Freescale i.MX
+ *
+ * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
+ *
+ * Some code from patch_hdmi.c
+ * Copyright (c) 2008-2010 Intel Corporation. All rights reserved.
+ * Copyright (c) 2006 ATI Technologies Inc.
+ * Copyright (c) 2008 NVIDIA Corp. All rights reserved.
+ * Copyright (c) 2008 Wei Ni <wni@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/mfd/mxc-hdmi-core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/asoundef.h>
+
+#include <video/mxc_hdmi.h>
+
+#include "imx-hdmi.h"
+
+
+static struct mxc_edid_cfg edid_cfg;
+
+static u32 playback_rates[HDMI_MAX_RATES];
+static u32 playback_sample_size[HDMI_MAX_SAMPLE_SIZE];
+static u32 playback_channels[HDMI_MAX_CHANNEL_CONSTRAINTS];
+
+static struct snd_pcm_hw_constraint_list playback_constraint_rates;
+static struct snd_pcm_hw_constraint_list playback_constraint_bits;
+static struct snd_pcm_hw_constraint_list playback_constraint_channels;
+
+#ifdef DEBUG
+static void dumpregs(struct snd_soc_dai *dai)
+{
+ u32 n, cts;
+
+ cts = (hdmi_readb(HDMI_AUD_CTS3) << 16) |
+ (hdmi_readb(HDMI_AUD_CTS2) << 8) |
+ hdmi_readb(HDMI_AUD_CTS1);
+
+ n = (hdmi_readb(HDMI_AUD_N3) << 16) |
+ (hdmi_readb(HDMI_AUD_N2) << 8) |
+ hdmi_readb(HDMI_AUD_N1);
+
+ dev_debug(dai->dev, "HDMI_PHY_CONF0 0x%02x\n",
+ hdmi_readb(HDMI_PHY_CONF0));
+ dev_debug(dai->dev, "HDMI_MC_CLKDIS 0x%02x\n",
+ hdmi_readb(HDMI_MC_CLKDIS));
+ dev_debug(dai->dev, "HDMI_AUD_N[1-3] 0x%06x (%d)\n",
+ n, n);
+ dev_debug(dai->dev, "HDMI_AUD_CTS[1-3] 0x%06x (%d)\n",
+ cts, cts);
+ dev_debug(dai->dev, "HDMI_FC_AUDSCONF 0x%02x\n",
+ hdmi_readb(HDMI_FC_AUDSCONF));
+}
+#else
+static void dumpregs(struct snd_soc_dai *dai) {}
+#endif
+
+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 */
+ FLW = (1 << 11), /* Front Left Wide */
+ FRW = (1 << 12), /* Front Right Wide */
+ FLH = (1 << 13), /* Front Left High */
+ FCH = (1 << 14), /* Front Center High */
+ FRH = (1 << 15), /* Front Right High */
+ TC = (1 << 16), /* Top Center */
+};
+
+/*
+ * EDID SA bits in the CEA Speaker Allocation data block
+ */
+static int edid_speaker_allocation_bits[] = {
+ [0] = FL | FR,
+ [1] = LFE,
+ [2] = FC,
+ [3] = RL | RR,
+ [4] = RC,
+ [5] = FLC | FRC,
+ [6] = RLC | RRC,
+ [7] = FLW | FRW,
+ [8] = FLH | FRH,
+ [9] = TC,
+ [10] = FCH,
+};
+
+struct cea_channel_speaker_allocation {
+ int ca_index;
+ int speakers[8];
+
+ /* Derived values, just for convenience */
+ int channels;
+ int spk_mask;
+};
+
+/*
+ * 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 },},
+ { .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 = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL },},
+ { .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL },},
+ { .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 },},
+ { .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 },},
+ /* 6.1 */
+ { .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, 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 },},
+ /* surround71 */
+ { .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, 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 },},
+ { .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL },},
+ { .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL },},
+ { .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL },},
+ { .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL },},
+ { .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL },},
+ { .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL },},
+ { .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL },},
+ { .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL },},
+ { .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL },},
+ { .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL },},
+ { .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL },},
+ { .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL },},
+};
+
+/* Compute derived values in channel_allocations[] */
+static void init_channel_allocations(void)
+{
+ struct cea_channel_speaker_allocation *p;
+ int i, j;
+
+ 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:
+ *
+ * speaker_alloc => (edid_speaker_allocation_bits[]) => spk_mask
+ * spk_mask => (channel_allocations[]) => CA
+ *
+ * TODO: it could select the wrong CA from multiple candidates.
+*/
+static int hdmi_channel_allocation(int channels)
+{
+ int spk_mask = 0, ca = 0, i, tmpchn, tmpspk;
+
+ /* CA defaults to 0 for basic stereo audio */
+ if (channels <= 2)
+ return 0;
+
+ /*
+ * Expand EDID's speaker allocation mask
+ *
+ * EDID tells the speaker mask in a compact(paired) form,
+ * expand EDID's notions to match the ones used by Audio InfoFrame.
+ */
+ for (i = 0; i < ARRAY_SIZE(edid_speaker_allocation_bits); i++) {
+ if (edid_cfg.speaker_alloc & (1 << i))
+ spk_mask |= edid_speaker_allocation_bits[i];
+ }
+
+ /* Search for the first working match in the CA table */
+ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+ tmpchn = channel_allocations[i].channels;
+ tmpspk = channel_allocations[i].spk_mask;
+
+ if (channels == tmpchn && (spk_mask & tmpspk) == tmpspk) {
+ ca = channel_allocations[i].ca_index;
+ break;
+ }
+ }
+
+ return ca;
+}
+
+static void hdmi_set_audio_infoframe(unsigned int channels)
+{
+ u8 audiconf0, audiconf2;
+
+ /*
+ * From CEA-861-D spec:
+ * HDMI requires the CT, SS and SF fields to be set to 0 ("Refer
+ * to Stream Header") as these items are carried in the audio stream.
+ *
+ * So we only set the CC and CA fields.
+ */
+ audiconf0 = ((channels - 1) << HDMI_FC_AUDICONF0_CC_OFFSET) &
+ HDMI_FC_AUDICONF0_CC_MASK;
+
+ audiconf2 = hdmi_channel_allocation(channels);
+
+ hdmi_writeb(audiconf0, HDMI_FC_AUDICONF0);
+ hdmi_writeb(0, HDMI_FC_AUDICONF1);
+ hdmi_writeb(audiconf2, HDMI_FC_AUDICONF2);
+ hdmi_writeb(0, HDMI_FC_AUDICONF3);
+}
+
+static int cea_audio_rates[HDMI_MAX_RATES] = {
+ 32000, 44100, 48000, 88200, 96000, 176400, 192000,
+};
+
+static void fsl_hdmi_get_playback_rates(void)
+{
+ int i, count = 0;
+ u8 rates;
+
+ /* Always assume basic audio support */
+ rates = edid_cfg.sample_rates | 0x7;
+
+ for (i = 0 ; i < HDMI_MAX_RATES ; i++)
+ if ((rates & (1 << i)) != 0)
+ playback_rates[count++] = cea_audio_rates[i];
+
+ playback_constraint_rates.list = playback_rates;
+ playback_constraint_rates.count = count;
+
+ for (i = 0 ; i < playback_constraint_rates.count ; i++)
+ pr_debug("%s: constraint = %d Hz\n", __func__, playback_rates[i]);
+}
+
+static void fsl_hdmi_get_playback_sample_size(void)
+{
+ int i = 0;
+
+ /* Always assume basic audio support */
+ playback_sample_size[i++] = 16;
+
+ if (edid_cfg.sample_sizes & 0x4)
+ playback_sample_size[i++] = 24;
+
+ playback_constraint_bits.list = playback_sample_size;
+ playback_constraint_bits.count = i;
+
+ for (i = 0 ; i < playback_constraint_bits.count ; i++)
+ pr_debug("%s: constraint = %d bits\n", __func__, playback_sample_size[i]);
+}
+
+static void fsl_hdmi_get_playback_channels(void)
+{
+ int channels = 2, i = 0;
+
+ /* Always assume basic audio support */
+ playback_channels[i++] = channels;
+ channels += 2;
+
+ while ((i < HDMI_MAX_CHANNEL_CONSTRAINTS) &&
+ (channels <= edid_cfg.max_channels)) {
+ playback_channels[i++] = channels;
+ channels += 2;
+ }
+
+ playback_constraint_channels.list = playback_channels;
+ playback_constraint_channels.count = i;
+
+ for (i = 0 ; i < playback_constraint_channels.count ; i++)
+ pr_debug("%s: constraint = %d channels\n", __func__, playback_channels[i]);
+}
+
+static int fsl_hdmi_update_constraints(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int ret;
+
+ hdmi_get_edid_cfg(&edid_cfg);
+
+ fsl_hdmi_get_playback_rates();
+ ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &playback_constraint_rates);
+ if (ret)
+ return ret;
+
+ fsl_hdmi_get_playback_sample_size();
+ ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+ &playback_constraint_bits);
+ if (ret)
+ return ret;
+
+ fsl_hdmi_get_playback_channels();
+ ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &playback_constraint_channels);
+ if (ret)
+ return ret;
+
+ ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int fsl_hdmi_soc_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct imx_hdmi *hdmi_data = snd_soc_dai_get_drvdata(dai);
+ int ret;
+
+ clk_prepare_enable(hdmi_data->mipi_core_clk);
+ clk_prepare_enable(hdmi_data->isfr_clk);
+ clk_prepare_enable(hdmi_data->iahb_clk);
+
+ dev_dbg(dai->dev, "%s hdmi clks: mipi_core: %d isfr:%d iahb:%d\n", __func__,
+ (int)clk_get_rate(hdmi_data->mipi_core_clk),
+ (int)clk_get_rate(hdmi_data->isfr_clk),
+ (int)clk_get_rate(hdmi_data->iahb_clk));
+
+ ret = fsl_hdmi_update_constraints(substream);
+ if (ret < 0)
+ return ret;
+
+ /* Indicates the subpacket represents a flatline sample */
+ hdmi_audio_writeb(FC_AUDSCONF, AUD_PACKET_SAMPFIT, 0x0);
+
+ return 0;
+}
+
+static void fsl_hdmi_soc_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct imx_hdmi *hdmi_data = snd_soc_dai_get_drvdata(dai);
+
+ clk_disable_unprepare(hdmi_data->iahb_clk);
+ clk_disable_unprepare(hdmi_data->isfr_clk);
+ clk_disable_unprepare(hdmi_data->mipi_core_clk);
+}
+
+static int fsl_hdmi_soc_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ hdmi_set_audio_infoframe(runtime->channels);
+ hdmi_audio_writeb(FC_AUDSCONF, AUD_PACKET_LAYOUT,
+ (runtime->channels > 2) ? 0x1 : 0x0);
+ hdmi_set_sample_rate(runtime->rate);
+ dumpregs(dai);
+
+ return 0;
+}
+
+static struct snd_soc_dai_ops fsl_hdmi_soc_dai_ops = {
+ .startup = fsl_hdmi_soc_startup,
+ .shutdown = fsl_hdmi_soc_shutdown,
+ .prepare = fsl_hdmi_soc_prepare,
+};
+
+/* IEC60958 status functions */
+static int fsl_hdmi_iec_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 fsl_hdmi_iec_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ int i;
+
+ for (i = 0 ; i < 4 ; i++)
+ uvalue->value.iec958.status[i] = iec_header.status[i];
+
+ return 0;
+}
+
+static int fsl_hdmi_iec_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ int i;
+
+ /* Do not allow professional mode */
+ if (uvalue->value.iec958.status[0] & IEC958_AES0_PROFESSIONAL)
+ return -EPERM;
+
+ for (i = 0 ; i < 4 ; i++) {
+ iec_header.status[i] = uvalue->value.iec958.status[i];
+ pr_debug("%s status[%d]=0x%02x\n", __func__, i, iec_header.status[i]);
+ }
+
+ return 0;
+}
+
+static int fsl_hdmi_channels_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ hdmi_get_edid_cfg(&edid_cfg);
+ fsl_hdmi_get_playback_channels();
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = playback_constraint_channels.count;
+
+ return 0;
+}
+
+
+static int fsl_hdmi_channels_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ int i;
+ hdmi_get_edid_cfg(&edid_cfg);
+ fsl_hdmi_get_playback_channels();
+
+ for (i = 0 ; i < playback_constraint_channels.count ; i++)
+ uvalue->value.integer.value[i] = playback_channels[i];
+
+ return 0;
+}
+
+static int fsl_hdmi_rates_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ hdmi_get_edid_cfg(&edid_cfg);
+ fsl_hdmi_get_playback_rates();
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = playback_constraint_rates.count;
+
+ return 0;
+}
+
+static int fsl_hdmi_rates_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ int i;
+ hdmi_get_edid_cfg(&edid_cfg);
+ fsl_hdmi_get_playback_rates();
+
+ for (i = 0 ; i < playback_constraint_rates.count ; i++)
+ uvalue->value.integer.value[i] = playback_rates[i];
+
+ return 0;
+}
+
+static int fsl_hdmi_formats_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ hdmi_get_edid_cfg(&edid_cfg);
+ fsl_hdmi_get_playback_sample_size();
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = playback_constraint_bits.count;
+
+ return 0;
+}
+
+static int fsl_hdmi_formats_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ int i;
+ hdmi_get_edid_cfg(&edid_cfg);
+ fsl_hdmi_get_playback_sample_size();
+
+ for (i = 0 ; i < playback_constraint_bits.count ; i++)
+ uvalue->value.integer.value[i] = playback_sample_size[i];
+
+ return 0;
+}
+
+static struct snd_kcontrol_new fsl_hdmi_ctrls[] = {
+ /* Status cchanel controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_WRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_hdmi_iec_info,
+ .get = fsl_hdmi_iec_get,
+ .put = fsl_hdmi_iec_put,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Support Channels",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_hdmi_channels_info,
+ .get = fsl_hdmi_channels_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Support Rates",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_hdmi_rates_info,
+ .get = fsl_hdmi_rates_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Support Formats",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_hdmi_formats_info,
+ .get = fsl_hdmi_formats_get,
+ },
+};
+
+static int fsl_hdmi_soc_dai_probe(struct snd_soc_dai *dai)
+{
+ int ret;
+
+ init_channel_allocations();
+
+ ret = snd_soc_add_dai_controls(dai, fsl_hdmi_ctrls,
+ ARRAY_SIZE(fsl_hdmi_ctrls));
+ if (ret)
+ dev_warn(dai->dev, "failed to add dai controls\n");
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver fsl_hdmi_dai = {
+ .probe = &fsl_hdmi_soc_dai_probe,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = MXC_HDMI_RATES_PLAYBACK,
+ .formats = MXC_HDMI_FORMATS_PLAYBACK,
+ },
+ .ops = &fsl_hdmi_soc_dai_ops,
+};
+
+static const struct snd_soc_component_driver fsl_hdmi_component = {
+ .name = "fsl-hdmi",
+};
+
+static int fsl_hdmi_dai_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct imx_hdmi *hdmi_data;
+ int ret = 0;
+
+ if (!np)
+ return -ENODEV;
+
+ if (!hdmi_get_registered()) {
+ dev_err(&pdev->dev, "failed to probe. Load HDMI-video first.\n");
+ return -ENOMEM;
+ }
+
+ hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
+ if (!hdmi_data) {
+ dev_err(&pdev->dev, "failed to alloc hdmi_data\n");
+ return -ENOMEM;
+ }
+
+ hdmi_data->pdev = pdev;
+
+ memcpy(&hdmi_data->cpu_dai_drv, &fsl_hdmi_dai, sizeof(fsl_hdmi_dai));
+ hdmi_data->cpu_dai_drv.name = np->name;
+
+ hdmi_data->mipi_core_clk = devm_clk_get(&pdev->dev, "mipi_core");
+ if (IS_ERR(hdmi_data->mipi_core_clk)) {
+ ret = PTR_ERR(hdmi_data->mipi_core_clk);
+ dev_err(&pdev->dev, "failed to get mipi core clk: %d\n", ret);
+ return -EINVAL;
+ }
+
+ hdmi_data->isfr_clk = devm_clk_get(&pdev->dev, "hdmi_isfr");
+ if (IS_ERR(hdmi_data->isfr_clk)) {
+ ret = PTR_ERR(hdmi_data->isfr_clk);
+ dev_err(&pdev->dev, "failed to get HDMI isfr clk: %d\n", ret);
+ return -EINVAL;
+ }
+
+ hdmi_data->iahb_clk = devm_clk_get(&pdev->dev, "hdmi_iahb");
+ if (IS_ERR(hdmi_data->iahb_clk)) {
+ ret = PTR_ERR(hdmi_data->iahb_clk);
+ dev_err(&pdev->dev, "failed to get HDMI ahb clk: %d\n", ret);
+ return -EINVAL;
+ }
+
+ dev_set_drvdata(&pdev->dev, hdmi_data);
+ ret = snd_soc_register_component(&pdev->dev, &fsl_hdmi_component,
+ &hdmi_data->cpu_dai_drv, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "register DAI failed\n");
+ return ret;
+ }
+
+ hdmi_data->codec_dev = platform_device_register_simple(
+ "hdmi-audio-codec", -1, NULL, 0);
+ if (IS_ERR(hdmi_data->codec_dev)) {
+ dev_err(&pdev->dev, "failed to register HDMI audio codec\n");
+ ret = PTR_ERR(hdmi_data->codec_dev);
+ goto fail;
+ }
+
+ hdmi_data->dma_dev = platform_device_alloc("imx-hdmi-audio", -1);
+ if (IS_ERR(hdmi_data->dma_dev)) {
+ ret = PTR_ERR(hdmi_data->dma_dev);
+ goto fail_dma;
+ }
+
+ platform_set_drvdata(hdmi_data->dma_dev, hdmi_data);
+
+ ret = platform_device_add(hdmi_data->dma_dev);
+ if (ret) {
+ platform_device_put(hdmi_data->dma_dev);
+ goto fail_dma;
+ }
+
+ return 0;
+
+fail_dma:
+ platform_device_unregister(hdmi_data->codec_dev);
+fail:
+ snd_soc_unregister_component(&pdev->dev);
+
+ return ret;
+}
+
+static int fsl_hdmi_dai_remove(struct platform_device *pdev)
+{
+ struct imx_hdmi *hdmi_data = platform_get_drvdata(pdev);
+
+ platform_device_unregister(hdmi_data->dma_dev);
+ platform_device_unregister(hdmi_data->codec_dev);
+ snd_soc_unregister_component(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id fsl_hdmi_dai_dt_ids[] = {
+ { .compatible = "fsl,imx6dl-hdmi-audio", },
+ { .compatible = "fsl,imx6q-hdmi-audio", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_hdmi_dai_dt_ids);
+
+static struct platform_driver fsl_hdmi_driver = {
+ .probe = fsl_hdmi_dai_probe,
+ .remove = fsl_hdmi_dai_remove,
+ .driver = {
+ .name = "fsl-hdmi-dai",
+ .owner = THIS_MODULE,
+ .of_match_table = fsl_hdmi_dai_dt_ids,
+ },
+};
+module_platform_driver(fsl_hdmi_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("IMX HDMI TX DAI");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:fsl-hdmi-dai");
--- /dev/null
+/**
+ * Copyright (C) 2010-2014 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+.section .text
+
+.global hdmi_dma_copy_16_neon_lut
+.global hdmi_dma_copy_16_neon_fast
+.global hdmi_dma_copy_24_neon_lut
+.global hdmi_dma_copy_24_neon_fast
+
+
+/**
+ * hdmi_dma_copy_16_neon_lut
+ * Convert pcm sample to iec sample. Pcm sample is 16 bits.
+ * Frame index's between 0 and 47 inclusively. Channel count can be 1, 2, 4, 8.
+ * Frame count should be multipliable by 4, and Sample count by 8.
+ *
+ * C Prototype
+ * void hdmi_dma_copy_16_neon_lut(unsigned short *src, unsigned int *dst,
+ * int samples, unsigned char *lookup_table);
+ * Return value
+ * None
+ * Parameters
+ * src Source PCM16 samples
+ * dst Dest buffer to store pcm with header
+ * samples Contains sample count (=frame_count * channel_count)
+ * lookup_table Preconstructed header table. Channels interleaved.
+ */
+
+hdmi_dma_copy_16_neon_lut:
+ mov r12, #1 /* construct vector(1) */
+ vdup.8 d6, r12
+
+hdmi_dma_copy_16_neon_lut_start:
+
+ /* get 8 samples to q0 */
+ vld1.16 {d0, d1}, [r0]! /* TODO: aligned */
+
+ /* pld [r1, #(64*4)] */
+
+ /* xor every bit */
+ vcnt.8 q1, q0 /* count of 1s */
+ vpadd.i8 d2, d2, d3 /* only care about the LST in every element */
+ vand d2, d2, d6 /* clear other bits while keep the least bit */
+ vshl.u8 d2, d2, #3 /* bit p: d2 = d2 << 3 */
+
+ /* get packet header */
+ vld1.8 {d5}, [r3]!
+ veor d4, d5, d2 /* xor bit c */
+
+ /* store: (d4 << 16 | q0) << 8 */
+ vmovl.u8 q2, d4 /* expand from char to short */
+ vzip.16 q0, q2
+ vshl.u32 q0, q0, #8
+ vshl.u32 q1, q2, #8
+ vst1.32 {d0, d1, d2, d3}, [r1]!
+
+ /* decrease sample count */
+ subs r2, r2, #8
+ bne hdmi_dma_copy_16_neon_lut_start
+
+ mov pc, lr
+
+/**
+ * hdmi_dma_copy_16_neon_fast
+ * Convert pcm sample to iec sample. Pcm sample is 16 bits.
+ * Frame index's between 48 and 191 inclusively.
+ * Channel count can be 1, 2, 4 or 8.
+ * Frame count should be multipliable by 4, and Sample count by 8.
+ *
+ * C Prototype
+ * void hdmi_dma_copy_16_neon_fast(unsigned short *src,
+ * unsigned int *dst, int samples);
+ * Return value
+ * None
+ * Parameters
+ * src Source PCM16 samples
+ * dst Dest buffer to store pcm with header
+ * samples Contains sample count (=frame_count * channel_count)
+ */
+
+hdmi_dma_copy_16_neon_fast:
+ mov r12, #1 /* construct vector(1) */
+ vdup.8 d6, r12
+
+hdmi_dma_copy_16_neon_fast_start:
+ /* get 8 samples to q0 */
+ vld1.16 {d0, d1}, [r0]! /* TODO: aligned */
+
+ /* pld [r1, #(64*4)] */
+
+ /* xor every bit */
+ vcnt.8 q1, q0 /* count of 1s */
+ vpadd.i8 d2, d2, d3
+ vand d2, d2, d6 /* clear other bits while keep the LST */
+ /* finally we construct packet header */
+ vshl.u8 d4, d2, #3 /* bit p: d2 = d2 << 3 */
+
+ /* get packet header: always 0 */
+
+ /* store: (d4 << 16 | q0) << 8 */
+ vmovl.u8 q2, d4 /* expand from char to short */
+ vzip.16 q0, q2
+ vshl.u32 q0, q0, #8
+ vshl.u32 q1, q2, #8
+ vst1.32 {d0, d1, d2, d3}, [r1]!
+
+ /* decrease sample count */
+ subs r2, r2, #8
+ bne hdmi_dma_copy_16_neon_fast_start
+
+ mov pc, lr
+
+
+
+/**
+ * hdmi_dma_copy_24_neon_lut
+ * Convert pcm sample to iec sample. Pcm sample is 24 bits.
+ * Frame index's between 0 and 47 inclusively. Channel count can be 1, 2, 4, 8.
+ * Frame count should be multipliable by 4, and Sample count by 8.
+ *
+ * C Prototype
+ * void hdmi_dma_copy_24_neon_lut(unsigned int *src, unsigned int *dst,
+ * int samples, unsigned char *lookup_table);
+ * Return value
+ * None
+ * Parameters
+ * src Source PCM24 samples
+ * dst Dest buffer to store pcm with header
+ * samples Contains sample count (=frame_count * channel_count)
+ * lookup_table Preconstructed header table. Channels interleaved.
+ */
+
+hdmi_dma_copy_24_neon_lut:
+ vpush {d8}
+
+ mov r12, #1 /* construct vector(1) */
+ vdup.8 d8, r12
+
+hdmi_dma_copy_24_neon_lut_start:
+
+ /* get 8 samples to q0 and q1 */
+ vld1.32 {d0, d1, d2, d3}, [r0]! /* TODO: aligned */
+
+ /* pld [r1, #(64*4)] */
+
+ /* xor every bit */
+ vcnt.8 q2, q0 /* count of 1s */
+ vpadd.i8 d4, d4, d5 /* only care about the LSB in every element */
+ vcnt.8 q3, q1
+ vpadd.i8 d6, d6, d7
+ vpadd.i8 d4, d4, d6 /* d4: contains xor result and other dirty bits */
+ vand d4, d4, d8 /* clear other bits while keep the least bit */
+ vshl.u8 d4, d4, #3 /* bit p: d4 = d4 << 3 */
+
+ /* get packet header */
+ vld1.8 {d5}, [r3]!/* d5: original header */
+ veor d5, d5, d4 /* fix bit p */
+
+ /* store: (d5 << 24 | q0) */
+ vmovl.u8 q3, d5 /* expand from char to short */
+ vmovl.u16 q2, d6 /* expand from short to int */
+ vmovl.u16 q3, d7
+ vshl.u32 q2, q2, #24
+ vshl.u32 q3, q3, #24
+ vorr q0, q0, q2
+ vorr q1, q1, q3
+ vst1.32 {d0, d1, d2, d3}, [r1]!
+
+ /* decrease sample count */
+ subs r2, r2, #8
+ bne hdmi_dma_copy_24_neon_lut_start
+
+ vpop {d8}
+ mov pc, lr
+
+/**
+ * hdmi_dma_copy_24_neon_fast
+ * Convert pcm sample to iec sample. Pcm sample is 24 bits.
+ * Frame index's between 48 and 191 inclusively.
+ * Channel count can be 1, 2, 4 or 8.
+ * Frame count should be multipliable by 4, and Sample count by 8.
+ *
+ * C Prototype
+ * void hdmi_dma_copy_24_neon_fast(unsigned int *src,
+ * unsigned int *dst, int samples);
+ * Return value
+ * None
+ * Parameters
+ * src Source PCM24 samples
+ * dst Dest buffer to store pcm with header
+ * samples Contains sample count (=frame_count * channel_count)
+ */
+
+hdmi_dma_copy_24_neon_fast:
+ vpush {d8}
+
+ mov r12, #1 /* construct vector(1) */
+ vdup.8 d8, r12
+
+hdmi_dma_copy_24_neon_fast_start:
+ /* get 8 samples to q0 and q1 */
+ vld1.32 {d0, d1, d2, d3}, [r0]! /* TODO: aligned */
+
+ /* pld [r1, #(64*4)] */
+
+ /* xor every bit */
+ vcnt.8 q2, q0 /* count of 1s */
+ vpadd.i8 d4, d4, d5 /* only care about the LSB in every element */
+ vcnt.8 q3, q1
+ vpadd.i8 d6, d6, d7
+ vpadd.i8 d4, d4, d6 /* d4: contains xor result and other dirty bits */
+ vand d4, d4, d8 /* clear other bits while keep the least bit */
+ vshl.u8 d4, d4, #3 /* bit p: d4 = d4 << 3 */
+
+ /* store: (d4 << 24 | q0) */
+ vmovl.u8 q3, d4 /* expand from char to short */
+ vmovl.u16 q2, d6 /* expand from short to int */
+ vmovl.u16 q3, d7
+ vshl.u32 q2, q2, #24
+ vshl.u32 q3, q3, #24
+ vorr q0, q0, q2
+ vorr q1, q1, q3
+ vst1.32 {d0, d1, d2, d3}, [r1]!
+
+ /* decrease sample count */
+ subs r2, r2, #8
+ bne hdmi_dma_copy_24_neon_fast_start
+
+ vpop {d8}
+ mov pc, lr
--- /dev/null
+/*
+ * imx-hdmi-dma.c -- HDMI DMA driver for ALSA Soc Audio Layer
+ *
+ * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
+ *
+ * based on imx-pcm-dma-mx2.c
+ * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * This code is based on code copyrighted by Freescale,
+ * Liam Girdwood, Javier Martin and probably others.
+ *
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/mfd/mxc-hdmi-core.h>
+#include <linux/platform_data/dma-imx.h>
+
+#include <video/mxc_hdmi.h>
+
+#include "imx-hdmi.h"
+
+#define HDMI_DMA_BURST_UNSPECIFIED_LEGNTH 0
+#define HDMI_DMA_BURST_INCR4 1
+#define HDMI_DMA_BURST_INCR8 2
+#define HDMI_DMA_BURST_INCR16 3
+
+#define HDMI_BASE_ADDR 0x00120000
+
+struct hdmi_sdma_script {
+ int control_reg_addr;
+ int status_reg_addr;
+ int dma_start_addr;
+ u32 buffer[20];
+};
+
+struct hdmi_dma_priv {
+ struct snd_pcm_substream *substream;
+ struct platform_device *pdev;
+
+ struct snd_dma_buffer hw_buffer;
+ unsigned long buffer_bytes;
+ unsigned long appl_bytes;
+
+ int periods;
+ int period_time;
+ int period_bytes;
+ int dma_period_bytes;
+ int buffer_ratio;
+
+ unsigned long offset;
+
+ snd_pcm_format_t format;
+ int sample_align;
+ int sample_bits;
+ int channels;
+ int rate;
+
+ int frame_idx;
+
+ bool tx_active;
+ spinlock_t irq_lock;
+
+ /* SDMA part */
+ dma_addr_t phy_hdmi_sdma_t;
+ struct hdmi_sdma_script *hdmi_sdma_t;
+ struct dma_chan *dma_channel;
+ struct dma_async_tx_descriptor *desc;
+ struct imx_hdmi_sdma_params sdma_params;
+};
+
+/* bit 0:0:0:b:p(0):c:(u)0:(v)0 */
+/* max 8 channels supported; channels are interleaved */
+static u8 g_packet_head_table[48 * 8];
+
+void hdmi_dma_copy_16_neon_lut(unsigned short *src, unsigned int *dst,
+ int samples, unsigned char *lookup_table);
+void hdmi_dma_copy_16_neon_fast(unsigned short *src, unsigned int *dst,
+ int samples);
+void hdmi_dma_copy_24_neon_lut(unsigned int *src, unsigned int *dst,
+ int samples, unsigned char *lookup_table);
+void hdmi_dma_copy_24_neon_fast(unsigned int *src, unsigned int *dst,
+ int samples);
+static void hdmi_dma_irq_enable(struct hdmi_dma_priv *priv);
+static void hdmi_dma_irq_disable(struct hdmi_dma_priv *priv);
+
+union hdmi_audio_header_t iec_header;
+EXPORT_SYMBOL(iec_header);
+
+/*
+ * Note that the period size for DMA != period size for ALSA because the
+ * driver adds iec frame info to the audio samples (in hdmi_dma_copy).
+ *
+ * Each 4 byte subframe = 1 byte of iec data + 3 byte audio sample.
+ *
+ * A 16 bit audio sample becomes 32 bits including the frame info. Ratio=2
+ * A 24 bit audio sample becomes 32 bits including the frame info. Ratio=3:4
+ * If the 24 bit raw audio is in 32 bit words, the
+ *
+ * Original Packed into subframe Ratio of size Format
+ * sample how many size of DMA buffer
+ * (bits) bits to ALSA buffer
+ * -------- ----------- -------- -------------- ------------------------
+ * 16 16 32 2 SNDRV_PCM_FORMAT_S16_LE
+ * 24 24 32 1.33 SNDRV_PCM_FORMAT_S24_3LE*
+ * 24 32 32 1 SNDRV_PCM_FORMAT_S24_LE
+ *
+ * *so SNDRV_PCM_FORMAT_S24_3LE is not supported.
+ */
+
+/*
+ * The minimum dma period is one IEC audio frame (192 * 4 * channels).
+ * The maximum dma period for the HDMI DMA is 8K.
+ *
+ * channels minimum maximum
+ * dma period dma period
+ * -------- ------------------ ----------
+ * 2 192 * 4 * 2 = 1536 * 4 = 6144
+ * 4 192 * 4 * 4 = 3072 * 2 = 6144
+ * 6 192 * 4 * 6 = 4608 * 1 = 4608
+ * 8 192 * 4 * 8 = 6144 * 1 = 6144
+ *
+ * Bottom line:
+ * 1. Must keep the ratio of DMA buffer to ALSA buffer consistent.
+ * 2. frame_idx is saved in the private data, so even if a frame cannot be
+ * transmitted in a period, it can be continued in the next period. This
+ * is necessary for 6 ch.
+ */
+#define HDMI_DMA_PERIOD_BYTES (12288)
+#define HDMI_DMA_BUF_SIZE (128 * 1024)
+#define HDMI_PCM_BUF_SIZE (128 * 1024)
+
+#define hdmi_audio_debug(dev, reg) \
+ dev_dbg(dev, #reg ": 0x%02x\n", hdmi_readb(reg))
+
+#ifdef DEBUG
+static void dumpregs(struct device *dev)
+{
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_CONF0);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_START);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_STOP);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_THRSLD);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_STRADDR0);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_STPADDR0);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_BSTADDR0);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_MBLENGTH0);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_MBLENGTH1);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_STAT);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_INT);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_MASK);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_POL);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_CONF1);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_BUFFSTAT);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_BUFFINT);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_BUFFMASK);
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_BUFFPOL);
+ hdmi_audio_debug(dev, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+ hdmi_audio_debug(dev, HDMI_IH_AHBDMAAUD_STAT0);
+ hdmi_audio_debug(dev, HDMI_IH_MUTE);
+}
+
+static void dumppriv(struct device *dev, struct hdmi_dma_priv *priv)
+{
+ dev_dbg(dev, "channels = %d\n", priv->channels);
+ dev_dbg(dev, "periods = %d\n", priv->periods);
+ dev_dbg(dev, "period_bytes = %d\n", priv->period_bytes);
+ dev_dbg(dev, "dma period_bytes = %d\n", priv->dma_period_bytes);
+ dev_dbg(dev, "buffer_ratio = %d\n", priv->buffer_ratio);
+ dev_dbg(dev, "hw dma buffer = 0x%08x\n", (int)priv->hw_buffer.addr);
+ dev_dbg(dev, "dma buf size = %d\n", (int)priv->buffer_bytes);
+ dev_dbg(dev, "sample_rate = %d\n", (int)priv->rate);
+}
+#else
+static void dumpregs(struct device *dev) {}
+static void dumppriv(struct device *dev, struct hdmi_dma_priv *priv) {}
+#endif
+
+/*
+ * Conditions for DMA to work:
+ * ((final_addr - initial_addr)>>2)+1) < 2k. So max period is 8k.
+ * (inital_addr & 0x3) == 0
+ * (final_addr & 0x3) == 0x3
+ *
+ * The DMA Period should be an integer multiple of the IEC 60958 audio
+ * frame size, which is 768 bytes (192 * 4).
+ */
+static void hdmi_dma_set_addr(int start_addr, int dma_period_bytes)
+{
+ int final_addr = start_addr + dma_period_bytes - 1;
+
+ hdmi_write4(start_addr, HDMI_AHB_DMA_STRADDR0);
+ hdmi_write4(final_addr, HDMI_AHB_DMA_STPADDR0);
+}
+
+static void hdmi_dma_irq_set(bool set)
+{
+ u8 val = hdmi_readb(HDMI_AHB_DMA_MASK);
+
+ if (set)
+ val |= HDMI_AHB_DMA_DONE;
+ else
+ val &= (u8)~HDMI_AHB_DMA_DONE;
+
+ hdmi_writeb(val, HDMI_AHB_DMA_MASK);
+}
+
+static void hdmi_mask(int mask)
+{
+ u8 regval = hdmi_readb(HDMI_AHB_DMA_MASK);
+
+ if (mask)
+ regval |= HDMI_AHB_DMA_ERROR | HDMI_AHB_DMA_FIFO_EMPTY;
+ else
+ regval &= (u8)~(HDMI_AHB_DMA_ERROR | HDMI_AHB_DMA_FIFO_EMPTY);
+
+ hdmi_writeb(regval, HDMI_AHB_DMA_MASK);
+}
+
+int odd_ones(unsigned a)
+{
+ a ^= a >> 8;
+ a ^= a >> 4;
+ a ^= a >> 2;
+ a ^= a >> 1;
+
+ return a & 1;
+}
+
+/* Add frame information for one pcm subframe */
+static u32 hdmi_dma_add_frame_info(struct hdmi_dma_priv *priv,
+ u32 pcm_data, int subframe_idx)
+{
+ union hdmi_audio_dma_data_t subframe;
+
+ subframe.U = 0;
+ iec_header.B.channel = subframe_idx;
+
+ /* fill b (start-of-block) */
+ subframe.B.b = (priv->frame_idx == 0) ? 1 : 0;
+
+ /* fill c (channel status) */
+ if (priv->frame_idx < 42)
+ subframe.B.c = (iec_header.U >> priv->frame_idx) & 0x1;
+ else
+ subframe.B.c = 0;
+
+ subframe.B.p = odd_ones(pcm_data);
+ subframe.B.p ^= subframe.B.c;
+ subframe.B.p ^= subframe.B.u;
+ subframe.B.p ^= subframe.B.v;
+
+ /* fill data */
+ if (priv->sample_bits == 16)
+ subframe.B.data = pcm_data << 8;
+ else
+ subframe.B.data = pcm_data;
+
+ return subframe.U;
+}
+
+static void init_table(int channels)
+{
+ unsigned char *p = g_packet_head_table;
+ int i, ch = 0;
+
+ for (i = 0; i < 48; i++) {
+ int b = 0;
+ if (i == 0)
+ b = 1;
+
+ for (ch = 0; ch < channels; ch++) {
+ int c = 0;
+ if (i < 42) {
+ iec_header.B.channel = ch+1;
+ c = (iec_header.U >> i) & 0x1;
+ }
+ /* preset bit p as c */
+ *p++ = (b << 4) | (c << 2) | (c << 3);
+ }
+ }
+}
+
+/*
+ * FIXME: Disable NEON Optimization in hdmi, or it will cause crash of
+ * pulseaudio in the userspace. There is no issue for the Optimization
+ * implemenation, if only use "VPUSH, VPOP" in the function, the pulseaudio
+ * will crash also. So for my assumption, we can't use the NEON in the
+ * interrupt.(tasklet is implemented by softirq.)
+ * Disable SMP, preempt, change the dma buffer to nocached, add protection of
+ * Dn register and fpscr, all these operation have no effect to the result.
+ */
+#define HDMI_DMA_NO_NEON
+
+#ifdef HDMI_DMA_NO_NEON
+/* Optimization for IEC head */
+static void hdmi_dma_copy_16_c_lut(u16 *src, u32 *dst, int samples,
+ u8 *lookup_table)
+{
+ u32 sample, head, p;
+ int i;
+
+ for (i = 0; i < samples; i++) {
+ /* get source sample */
+ sample = *src++;
+
+ /* xor every bit */
+ p = sample ^ (sample >> 8);
+ p ^= (p >> 4);
+ p ^= (p >> 2);
+ p ^= (p >> 1);
+ p &= 1; /* only want last bit */
+ p <<= 3; /* bit p */
+
+ /* get packet header */
+ head = *lookup_table++;
+
+ /* fix head */
+ head ^= p;
+
+ /* store */
+ *dst++ = (head << 24) | (sample << 8);
+ }
+}
+
+static void hdmi_dma_copy_16_c_fast(u16 *src, u32 *dst, int samples)
+{
+ u32 sample, p;
+ int i;
+
+ for (i = 0; i < samples; i++) {
+ /* get source sample */
+ sample = *src++;
+
+ /* xor every bit */
+ p = sample ^ (sample >> 8);
+ p ^= (p >> 4);
+ p ^= (p >> 2);
+ p ^= (p >> 1);
+ p &= 1; /* only want last bit */
+ p <<= 3; /* bit p */
+
+ /* store */
+ *dst++ = (p << 24) | (sample << 8);
+ }
+}
+
+static void hdmi_dma_copy_16(u16 *src, u32 *dst, int framecnt, int channelcnt)
+{
+ /* split input frames into 192-frame each */
+ int count_in_192 = (framecnt + 191) / 192;
+ int i;
+
+ for (i = 0; i < count_in_192; i++) {
+ int count, samples;
+
+ /* handles frame index [0, 48) */
+ count = (framecnt < 48) ? framecnt : 48;
+ samples = count * channelcnt;
+ hdmi_dma_copy_16_c_lut(src, dst, samples, g_packet_head_table);
+ framecnt -= count;
+ if (framecnt == 0)
+ break;
+
+ src += samples;
+ dst += samples;
+
+ /* handles frame index [48, 192) */
+ count = (framecnt < 192 - 48) ? framecnt : 192 - 48;
+ samples = count * channelcnt;
+ hdmi_dma_copy_16_c_fast(src, dst, samples);
+ framecnt -= count;
+ src += samples;
+ dst += samples;
+ }
+}
+#else
+/* NEON optimization for IEC head*/
+
+/**
+ * Convert pcm samples to iec samples suitable for HDMI transfer.
+ * PCM sample is 16 bits length.
+ * Frame index always starts from 0.
+ * Channel count can be 1, 2, 4, 6, or 8
+ * Sample count (frame_count * channel_count) is multipliable by 8.
+ */
+static void hdmi_dma_copy_16(u16 *src, u32 *dst, int framecount, int channelcount)
+{
+ /* split input frames into 192-frame each */
+ int i, count_in_192 = (framecount + 191) / 192;
+
+ for (i = 0; i < count_in_192; i++) {
+ int count, samples;
+
+ /* handles frame index [0, 48) */
+ count = (framecount < 48) ? framecount : 48;
+ samples = count * channelcount;
+ hdmi_dma_copy_16_neon_lut(src, dst, samples, g_packet_head_table);
+ framecount -= count;
+ if (framecount == 0)
+ break;
+
+ src += samples;
+ dst += samples;
+
+ /* handles frame index [48, 192) */
+ count = (framecount < 192 - 48) ? framecount : (192 - 48);
+ samples = count * channelcount;
+ hdmi_dma_copy_16_neon_fast(src, dst, samples);
+ framecount -= count;
+ src += samples;
+ dst += samples;
+ }
+}
+#endif
+
+static void hdmi_dma_mmap_copy(struct snd_pcm_substream *substream,
+ int offset, int count)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+ struct device *dev = rtd->platform->dev;
+ u32 framecount, *dst;
+ u16 *src16;
+
+ framecount = count / (priv->sample_align * priv->channels);
+
+ /* hw_buffer is the destination for pcm data plus frame info. */
+ dst = (u32 *)(priv->hw_buffer.area + (offset * priv->buffer_ratio));
+
+ switch (priv->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ /* dma_buffer is the mmapped buffer we are copying pcm from. */
+ src16 = (u16 *)(runtime->dma_area + offset);
+ hdmi_dma_copy_16(src16, dst, framecount, priv->channels);
+ break;
+ default:
+ dev_err(dev, "unsupported sample format %s\n",
+ snd_pcm_format_name(priv->format));
+ return;
+ }
+}
+
+static void hdmi_dma_data_copy(struct snd_pcm_substream *substream,
+ struct hdmi_dma_priv *priv, char type)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ unsigned long offset, count, appl_bytes, space_to_end;
+
+ if (runtime->access != SNDRV_PCM_ACCESS_MMAP_INTERLEAVED)
+ return;
+
+ appl_bytes = frames_to_bytes(runtime, runtime->status->hw_ptr);
+ if (type == 'p')
+ appl_bytes += 2 * priv->period_bytes;
+ offset = appl_bytes % priv->buffer_bytes;
+
+ switch (type) {
+ case 'p':
+ count = priv->period_bytes;
+ space_to_end = priv->period_bytes;
+ break;
+ case 'b':
+ count = priv->buffer_bytes;
+ space_to_end = priv->buffer_bytes - offset;
+
+ break;
+ default:
+ return;
+ }
+
+ if (count <= space_to_end) {
+ hdmi_dma_mmap_copy(substream, offset, count);
+ } else {
+ hdmi_dma_mmap_copy(substream, offset, space_to_end);
+ hdmi_dma_mmap_copy(substream, 0, count - space_to_end);
+ }
+}
+
+static void hdmi_sdma_callback(void *data)
+{
+ struct hdmi_dma_priv *priv = (struct hdmi_dma_priv *)data;
+ struct snd_pcm_substream *substream = priv->substream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->irq_lock, flags);
+
+ if (runtime && runtime->dma_area && priv->tx_active) {
+ priv->offset += priv->period_bytes;
+ priv->offset %= priv->period_bytes * priv->periods;
+
+ /* Copy data by period_bytes */
+ hdmi_dma_data_copy(substream, priv, 'p');
+
+ snd_pcm_period_elapsed(substream);
+ }
+
+ spin_unlock_irqrestore(&priv->irq_lock, flags);
+
+ return;
+}
+
+static int hdmi_dma_set_thrsld_incrtype(struct device *dev, int channels)
+{
+ u8 mask = HDMI_AHB_DMA_CONF0_BURST_MODE | HDMI_AHB_DMA_CONF0_INCR_TYPE_MASK;
+ u8 val = hdmi_readb(HDMI_AHB_DMA_CONF0) & ~mask;
+ int incr_type, threshold;
+
+ switch (hdmi_readb(HDMI_REVISION_ID)) {
+ case 0x0a:
+ incr_type = HDMI_DMA_BURST_INCR4;
+ if (channels == 2)
+ threshold = 126;
+ else
+ threshold = 124;
+ break;
+ case 0x1a:
+ incr_type = HDMI_DMA_BURST_INCR8;
+ threshold = 128;
+ break;
+ default:
+ dev_err(dev, "unknown hdmi controller!\n");
+ return -ENODEV;
+ }
+
+ hdmi_writeb(threshold, HDMI_AHB_DMA_THRSLD);
+
+ switch (incr_type) {
+ case HDMI_DMA_BURST_UNSPECIFIED_LEGNTH:
+ break;
+ case HDMI_DMA_BURST_INCR4:
+ val |= HDMI_AHB_DMA_CONF0_BURST_MODE;
+ break;
+ case HDMI_DMA_BURST_INCR8:
+ val |= HDMI_AHB_DMA_CONF0_BURST_MODE |
+ HDMI_AHB_DMA_CONF0_INCR8;
+ break;
+ case HDMI_DMA_BURST_INCR16:
+ val |= HDMI_AHB_DMA_CONF0_BURST_MODE |
+ HDMI_AHB_DMA_CONF0_INCR16;
+ break;
+ default:
+ dev_err(dev, "invalid increment type: %d!", incr_type);
+ return -EINVAL;
+ }
+
+ hdmi_writeb(val, HDMI_AHB_DMA_CONF0);
+
+ hdmi_audio_debug(dev, HDMI_AHB_DMA_THRSLD);
+
+ return 0;
+}
+
+static int hdmi_dma_configure_dma(struct device *dev, int channels)
+{
+ u8 i, val = 0;
+ int ret;
+
+ if (channels <= 0 || channels > 8 || channels % 2 != 0) {
+ dev_err(dev, "unsupported channel number: %d\n", channels);
+ return -EINVAL;
+ }
+
+ hdmi_audio_writeb(AHB_DMA_CONF0, EN_HLOCK, 0x1);
+
+ ret = hdmi_dma_set_thrsld_incrtype(dev, channels);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < channels; i += 2)
+ val |= 0x3 << i;
+
+ hdmi_writeb(val, HDMI_AHB_DMA_CONF1);
+
+ return 0;
+}
+
+static void hdmi_dma_init_iec_header(void)
+{
+ iec_header.U = 0;
+
+ iec_header.B.consumer = 0; /* Consumer use */
+ iec_header.B.linear_pcm = 0; /* linear pcm audio */
+ iec_header.B.copyright = 1; /* no copyright */
+ iec_header.B.pre_emphasis = 0; /* 2 channels without pre-emphasis */
+ iec_header.B.mode = 0; /* Mode 0 */
+
+ iec_header.B.category_code = 0;
+
+ iec_header.B.source = 2; /* stereo */
+ iec_header.B.channel = 0;
+
+ iec_header.B.sample_freq = 0x02; /* 48 KHz */
+ iec_header.B.clock_acc = 0; /* Level II */
+
+ iec_header.B.word_length = 0x02; /* 16 bits */
+ iec_header.B.org_sample_freq = 0x0D; /* 48 KHz */
+
+ iec_header.B.cgms_a = 0; /* Copying is permitted without restriction */
+}
+
+static int hdmi_dma_update_iec_header(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+ struct device *dev = rtd->platform->dev;
+
+ iec_header.B.source = priv->channels;
+
+ switch (priv->rate) {
+ case 32000:
+ iec_header.B.sample_freq = 0x03;
+ iec_header.B.org_sample_freq = 0x0C;
+ break;
+ case 44100:
+ iec_header.B.sample_freq = 0x00;
+ iec_header.B.org_sample_freq = 0x0F;
+ break;
+ case 48000:
+ iec_header.B.sample_freq = 0x02;
+ iec_header.B.org_sample_freq = 0x0D;
+ break;
+ case 88200:
+ iec_header.B.sample_freq = 0x08;
+ iec_header.B.org_sample_freq = 0x07;
+ break;
+ case 96000:
+ iec_header.B.sample_freq = 0x0A;
+ iec_header.B.org_sample_freq = 0x05;
+ break;
+ case 176400:
+ iec_header.B.sample_freq = 0x0C;
+ iec_header.B.org_sample_freq = 0x03;
+ break;
+ case 192000:
+ iec_header.B.sample_freq = 0x0E;
+ iec_header.B.org_sample_freq = 0x01;
+ break;
+ default:
+ dev_err(dev, "unsupported sample rate\n");
+ return -EFAULT;
+ }
+
+ switch (priv->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ iec_header.B.word_length = 0x02;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ iec_header.B.word_length = 0x0b;
+ break;
+ default:
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+/*
+ * The HDMI block transmits the audio data without adding any of the audio
+ * frame bits. So we have to copy the raw dma data from the ALSA buffer
+ * to the DMA buffer, adding the frame information.
+ */
+static int hdmi_dma_copy(struct snd_pcm_substream *substream, int channel,
+ snd_pcm_uframes_t pos, void __user *buf,
+ snd_pcm_uframes_t frames)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+ unsigned int count = frames_to_bytes(runtime, frames);
+ unsigned int pos_bytes = frames_to_bytes(runtime, pos);
+ u32 *hw_buf;
+ int subframe_idx;
+ u32 pcm_data;
+
+ /* Adding frame info to pcm data from userspace and copy to hw_buffer */
+ hw_buf = (u32 *)(priv->hw_buffer.area + (pos_bytes * priv->buffer_ratio));
+
+ while (count > 0) {
+ for (subframe_idx = 1 ; subframe_idx <= priv->channels ; subframe_idx++) {
+ if (copy_from_user(&pcm_data, buf, priv->sample_align))
+ return -EFAULT;
+
+ buf += priv->sample_align;
+ count -= priv->sample_align;
+
+ /* Save the header info to the audio dma buffer */
+ *hw_buf++ = hdmi_dma_add_frame_info(priv, pcm_data, subframe_idx);
+ }
+
+ priv->frame_idx++;
+ if (priv->frame_idx == 192)
+ priv->frame_idx = 0;
+ }
+
+ return 0;
+}
+
+static int hdmi_sdma_initbuf(struct device *dev, struct hdmi_dma_priv *priv)
+{
+ struct hdmi_sdma_script *hdmi_sdma_t = priv->hdmi_sdma_t;
+ u32 *head, *tail, i;
+
+ if (!hdmi_sdma_t) {
+ dev_err(dev, "hdmi private addr invalid!!!\n");
+ return -EINVAL;
+ }
+
+ hdmi_sdma_t->control_reg_addr = HDMI_BASE_ADDR + HDMI_AHB_DMA_START;
+ hdmi_sdma_t->status_reg_addr = HDMI_BASE_ADDR + HDMI_IH_AHBDMAAUD_STAT0;
+ hdmi_sdma_t->dma_start_addr = HDMI_BASE_ADDR + HDMI_AHB_DMA_STRADDR0;
+
+ head = &hdmi_sdma_t->buffer[0];
+ tail = &hdmi_sdma_t->buffer[1];
+
+ for (i = 0; i < priv->sdma_params.buffer_num; i++) {
+ *head = priv->hw_buffer.addr + i * priv->period_bytes * priv->buffer_ratio;
+ *tail = *head + priv->dma_period_bytes - 1;
+ head += 2;
+ tail += 2;
+ }
+
+ return 0;
+}
+
+static int hdmi_sdma_config(struct snd_pcm_substream *substream,
+ struct hdmi_dma_priv *priv)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct device *dai_dev = &priv->pdev->dev;
+ struct device *dev = rtd->platform->dev;
+ struct dma_slave_config slave_config;
+ int ret;
+
+ priv->dma_channel = dma_request_slave_channel(dai_dev, "tx");
+ if (priv->dma_channel == NULL) {
+ dev_err(dev, "failed to alloc dma channel\n");
+ return -EBUSY;
+ }
+
+ slave_config.direction = DMA_TRANS_NONE;
+ slave_config.src_addr = (dma_addr_t)priv->sdma_params.buffer_num;
+ slave_config.dst_addr = (dma_addr_t)priv->sdma_params.phyaddr;
+
+ ret = dmaengine_slave_config(priv->dma_channel, &slave_config);
+ if (ret) {
+ dev_err(dev, "failed to config slave dma\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int hdmi_dma_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+
+ if (priv->dma_channel) {
+ dma_release_channel(priv->dma_channel);
+ priv->dma_channel = NULL;
+ }
+
+ return 0;
+}
+
+static int hdmi_dma_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct device *dev = rtd->platform->dev;
+ int ret;
+
+ priv->buffer_bytes = params_buffer_bytes(params);
+ priv->periods = params_periods(params);
+ priv->period_bytes = params_period_bytes(params);
+ priv->channels = params_channels(params);
+ priv->format = params_format(params);
+ priv->rate = params_rate(params);
+
+ priv->offset = 0;
+ priv->period_time = HZ / (priv->rate / params_period_size(params));
+
+ switch (priv->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ priv->buffer_ratio = 2;
+ priv->sample_align = 2;
+ priv->sample_bits = 16;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ /* 24 bit audio in 32 bit word */
+ priv->buffer_ratio = 1;
+ priv->sample_align = 4;
+ priv->sample_bits = 24;
+ break;
+ default:
+ dev_err(dev, "unsupported sample format: %d\n", priv->format);
+ return -EINVAL;
+ }
+
+ priv->dma_period_bytes = priv->period_bytes * priv->buffer_ratio;
+ priv->sdma_params.buffer_num = priv->periods;
+ priv->sdma_params.phyaddr = priv->phy_hdmi_sdma_t;
+
+ ret = hdmi_sdma_initbuf(dev, priv);
+ if (ret)
+ return ret;
+
+ ret = hdmi_sdma_config(substream, priv);
+ if (ret)
+ return ret;
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+ ret = hdmi_dma_configure_dma(dev, priv->channels);
+ if (ret)
+ return ret;
+
+ hdmi_dma_set_addr(priv->hw_buffer.addr, priv->dma_period_bytes);
+
+ dumppriv(dev, priv);
+
+ hdmi_dma_update_iec_header(substream);
+
+ /* Init par for mmap optimizate */
+ init_table(priv->channels);
+
+ priv->appl_bytes = 0;
+
+ return 0;
+}
+
+static void hdmi_dma_trigger_init(struct snd_pcm_substream *substream,
+ struct hdmi_dma_priv *priv)
+{
+ unsigned long status;
+
+ priv->offset = 0;
+ priv->frame_idx = 0;
+
+ /* Copy data by buffer_bytes */
+ hdmi_dma_data_copy(substream, priv, 'b');
+
+ hdmi_audio_writeb(AHB_DMA_CONF0, SW_FIFO_RST, 0x1);
+
+ /* Delay after reset */
+ udelay(1);
+
+ status = hdmi_readb(HDMI_IH_AHBDMAAUD_STAT0);
+ hdmi_writeb(status, HDMI_IH_AHBDMAAUD_STAT0);
+}
+
+static int hdmi_dma_prepare_and_submit(struct snd_pcm_substream *substream,
+ struct hdmi_dma_priv *priv)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct device *dev = rtd->platform->dev;
+
+ priv->desc = dmaengine_prep_dma_cyclic(priv->dma_channel, 0, 0, 0,
+ DMA_TRANS_NONE, 0);
+ if (!priv->desc) {
+ dev_err(dev, "failed to prepare slave dma\n");
+ return -EINVAL;
+ }
+
+ priv->desc->callback = hdmi_sdma_callback;
+ priv->desc->callback_param = (void *)priv;
+ dmaengine_submit(priv->desc);
+
+ return 0;
+}
+
+static int hdmi_dma_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+ struct device *dev = rtd->platform->dev;
+ int ret;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (!check_hdmi_state())
+ return 0;
+ hdmi_dma_trigger_init(substream, priv);
+
+ dumpregs(dev);
+
+ priv->tx_active = true;
+ hdmi_audio_writeb(AHB_DMA_START, START, 0x1);
+ hdmi_dma_irq_set(false);
+ hdmi_set_dma_mode(1);
+ ret = hdmi_dma_prepare_and_submit(substream, priv);
+ if (ret)
+ return ret;
+ dma_async_issue_pending(priv->desc->chan);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ dmaengine_terminate_all(priv->dma_channel);
+ hdmi_set_dma_mode(0);
+ hdmi_dma_irq_set(true);
+ hdmi_audio_writeb(AHB_DMA_STOP, STOP, 0x1);
+ priv->tx_active = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static snd_pcm_uframes_t hdmi_dma_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+
+ return bytes_to_frames(runtime, priv->offset);
+}
+
+static struct snd_pcm_hardware snd_imx_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = MXC_HDMI_FORMATS_PLAYBACK,
+ .rate_min = 32000,
+ .channels_min = 2,
+ .channels_max = 8,
+ .buffer_bytes_max = HDMI_PCM_BUF_SIZE,
+ .period_bytes_min = HDMI_DMA_PERIOD_BYTES / 2,
+ .period_bytes_max = HDMI_DMA_PERIOD_BYTES / 2,
+ .periods_min = 8,
+ .periods_max = 8,
+ .fifo_size = 0,
+};
+
+static void hdmi_dma_irq_enable(struct hdmi_dma_priv *priv)
+{
+ unsigned long flags;
+
+ hdmi_writeb(0xff, HDMI_AHB_DMA_POL);
+ hdmi_writeb(0xff, HDMI_AHB_DMA_BUFFPOL);
+
+ spin_lock_irqsave(&priv->irq_lock, flags);
+
+ hdmi_writeb(0xff, HDMI_IH_AHBDMAAUD_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+ hdmi_dma_irq_set(false);
+ hdmi_mask(0);
+
+ spin_unlock_irqrestore(&priv->irq_lock, flags);
+}
+
+static void hdmi_dma_irq_disable(struct hdmi_dma_priv *priv)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->irq_lock, flags);
+
+ hdmi_dma_irq_set(true);
+ hdmi_writeb(0x0, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_AHBDMAAUD_STAT0);
+ hdmi_mask(1);
+
+ spin_unlock_irqrestore(&priv->irq_lock, flags);
+}
+
+static int hdmi_dma_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct device *dev = rtd->platform->dev;
+ struct hdmi_dma_priv *priv = dev_get_drvdata(dev);
+ int ret;
+
+ runtime->private_data = priv;
+
+ ret = mxc_hdmi_register_audio(substream);
+ if (ret < 0) {
+ dev_err(dev, "HDMI Video is not ready!\n");
+ return ret;
+ }
+
+ hdmi_audio_writeb(AHB_DMA_CONF0, SW_FIFO_RST, 0x1);
+
+ ret = snd_pcm_hw_constraint_integer(substream->runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ return ret;
+
+ snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
+
+ hdmi_dma_irq_enable(priv);
+
+ return 0;
+}
+
+static int hdmi_dma_close(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct hdmi_dma_priv *priv = runtime->private_data;
+
+ hdmi_dma_irq_disable(priv);
+ mxc_hdmi_unregister_audio(substream);
+
+ return 0;
+}
+
+static struct snd_pcm_ops imx_hdmi_dma_pcm_ops = {
+ .open = hdmi_dma_open,
+ .close = hdmi_dma_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = hdmi_dma_hw_params,
+ .hw_free = hdmi_dma_hw_free,
+ .trigger = hdmi_dma_trigger,
+ .pointer = hdmi_dma_pointer,
+ .copy = hdmi_dma_copy,
+};
+
+static int imx_hdmi_dma_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+ struct hdmi_dma_priv *priv = dev_get_drvdata(rtd->platform->dev);
+ struct snd_card *card = rtd->card->snd_card;
+ struct snd_pcm_substream *substream;
+ struct snd_pcm *pcm = rtd->pcm;
+ u64 dma_mask = DMA_BIT_MASK(32);
+ int ret = 0;
+
+ if (!card->dev->dma_mask)
+ card->dev->dma_mask = &dma_mask;
+ if (!card->dev->coherent_dma_mask)
+ card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+
+ substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+
+ ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
+ HDMI_PCM_BUF_SIZE, &substream->dma_buffer);
+ if (ret) {
+ dev_err(card->dev, "failed to alloc playback dma buffer\n");
+ return ret;
+ }
+
+ priv->substream = substream;
+
+ /* Alloc the hw_buffer */
+ ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
+ HDMI_DMA_BUF_SIZE, &priv->hw_buffer);
+ if (ret) {
+ dev_err(card->dev, "failed to alloc hw dma buffer\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static void imx_hdmi_dma_pcm_free(struct snd_pcm *pcm)
+{
+ int stream = SNDRV_PCM_STREAM_PLAYBACK;
+ struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+ struct snd_soc_pcm_runtime *rtd = pcm->private_data;
+ struct hdmi_dma_priv *priv = dev_get_drvdata(rtd->platform->dev);
+
+ if (substream) {
+ snd_dma_free_pages(&substream->dma_buffer);
+ substream->dma_buffer.area = NULL;
+ substream->dma_buffer.addr = 0;
+ }
+
+ /* Free the hw_buffer */
+ snd_dma_free_pages(&priv->hw_buffer);
+ priv->hw_buffer.area = NULL;
+ priv->hw_buffer.addr = 0;
+}
+
+static struct snd_soc_platform_driver imx_hdmi_platform = {
+ .ops = &imx_hdmi_dma_pcm_ops,
+ .pcm_new = imx_hdmi_dma_pcm_new,
+ .pcm_free = imx_hdmi_dma_pcm_free,
+};
+
+static int imx_soc_platform_probe(struct platform_device *pdev)
+{
+ struct imx_hdmi *hdmi_drvdata = platform_get_drvdata(pdev);
+ struct hdmi_dma_priv *priv;
+ int ret = 0;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "Failed to alloc hdmi_dma\n");
+ return -ENOMEM;
+ }
+
+ priv->hdmi_sdma_t = dma_alloc_coherent(NULL,
+ sizeof(struct hdmi_sdma_script),
+ &priv->phy_hdmi_sdma_t, GFP_KERNEL);
+ if (!priv->hdmi_sdma_t) {
+ dev_err(&pdev->dev, "Failed to alloc hdmi_sdma_t\n");
+ return -ENOMEM;
+ }
+
+ priv->tx_active = false;
+ spin_lock_init(&priv->irq_lock);
+
+ priv->pdev = hdmi_drvdata->pdev;
+
+ hdmi_dma_init_iec_header();
+
+ dev_set_drvdata(&pdev->dev, priv);
+
+ switch (hdmi_readb(HDMI_REVISION_ID)) {
+ case 0x0a:
+ snd_imx_hardware.period_bytes_max = HDMI_DMA_PERIOD_BYTES / 4;
+ snd_imx_hardware.period_bytes_min = HDMI_DMA_PERIOD_BYTES / 4;
+ break;
+ default:
+ break;
+ }
+
+ ret = snd_soc_register_platform(&pdev->dev, &imx_hdmi_platform);
+ if (ret)
+ goto err_plat;
+
+ return 0;
+
+err_plat:
+ dma_free_coherent(NULL, sizeof(struct hdmi_sdma_script),
+ priv->hdmi_sdma_t, priv->phy_hdmi_sdma_t);
+
+ return ret;
+}
+
+static int imx_soc_platform_remove(struct platform_device *pdev)
+{
+ struct hdmi_dma_priv *priv = dev_get_drvdata(&pdev->dev);
+
+ dma_free_coherent(NULL, sizeof(struct hdmi_sdma_script),
+ priv->hdmi_sdma_t, priv->phy_hdmi_sdma_t);
+
+ snd_soc_unregister_platform(&pdev->dev);
+
+ return 0;
+}
+
+static struct platform_driver imx_hdmi_dma_driver = {
+ .driver = {
+ .name = "imx-hdmi-audio",
+ .owner = THIS_MODULE,
+ },
+ .probe = imx_soc_platform_probe,
+ .remove = imx_soc_platform_remove,
+};
+
+module_platform_driver(imx_hdmi_dma_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("i.MX HDMI audio DMA");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * ASoC HDMI Transmitter driver for IMX development boards
+ *
+ * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
+ *
+ * based on stmp3780_devb_hdmi.c
+ *
+ * Vladimir Barinov <vbarinov@embeddedalley.com>
+ *
+ * Copyright 2008 SigmaTel, Inc
+ * Copyright 2008 Embedded Alley Solutions, Inc
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/mfd/mxc-hdmi-core.h>
+#include <sound/soc.h>
+
+#include "imx-hdmi.h"
+
+/* imx digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link imx_hdmi_dai_link = {
+ .name = "i.MX HDMI Audio Tx",
+ .stream_name = "i.MX HDMI Audio Tx",
+ .codec_dai_name = "hdmi-hifi",
+ .codec_name = "hdmi-audio-codec",
+ .platform_name = "imx-hdmi-audio",
+};
+
+static struct snd_soc_card snd_soc_card_imx_hdmi = {
+ .name = "imx-hdmi-soc",
+ .dai_link = &imx_hdmi_dai_link,
+ .num_links = 1,
+};
+
+static int imx_hdmi_audio_probe(struct platform_device *pdev)
+{
+ struct device_node *hdmi_np, *np = pdev->dev.of_node;
+ struct snd_soc_card *card = &snd_soc_card_imx_hdmi;
+ struct platform_device *hdmi_pdev;
+ int ret = 0;
+
+ if (!hdmi_get_registered()) {
+ dev_err(&pdev->dev, "initialize HDMI-audio failed. load HDMI-video first!\n");
+ return -ENODEV;
+ }
+
+ hdmi_np = of_parse_phandle(np, "hdmi-controller", 0);
+ if (!hdmi_np) {
+ dev_err(&pdev->dev, "failed to find hdmi-audio cpudai\n");
+ ret = -EINVAL;
+ goto end;
+ }
+
+ hdmi_pdev = of_find_device_by_node(hdmi_np);
+ if (!hdmi_pdev) {
+ dev_err(&pdev->dev, "failed to find SSI platform device\n");
+ ret = -EINVAL;
+ goto end;
+ }
+
+ card->dev = &pdev->dev;
+ card->dai_link->cpu_dai_name = dev_name(&hdmi_pdev->dev);
+
+ platform_set_drvdata(pdev, card);
+
+ ret = snd_soc_register_card(card);
+ if (ret)
+ dev_err(&pdev->dev, "failed to register card: %d\n", ret);
+
+end:
+ if (hdmi_np)
+ of_node_put(hdmi_np);
+
+ return ret;
+}
+
+static int imx_hdmi_audio_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_card(card);
+
+ return 0;
+}
+
+static const struct of_device_id imx_hdmi_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-hdmi", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
+
+static struct platform_driver imx_hdmi_audio_driver = {
+ .probe = imx_hdmi_audio_probe,
+ .remove = imx_hdmi_audio_remove,
+ .driver = {
+ .of_match_table = imx_hdmi_dt_ids,
+ .name = "imx-audio-hdmi",
+ .owner = THIS_MODULE,
+ .pm = &snd_soc_pm_ops,
+ },
+};
+
+module_platform_driver(imx_hdmi_audio_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("IMX HDMI TX ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-audio-hdmi");
--- /dev/null
+/*
+ * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __IMX_HDMI_H
+#define __IMX_HDMI_H
+
+struct imx_hdmi_sdma_params {
+ dma_addr_t phyaddr;
+ u32 buffer_num;
+ int dma;
+};
+
+struct imx_hdmi {
+ struct snd_soc_dai_driver cpu_dai_drv;
+ struct platform_device *codec_dev;
+ struct platform_device *dma_dev;
+ struct platform_device *pdev;
+ struct clk *isfr_clk;
+ struct clk *iahb_clk;
+ struct clk *mipi_core_clk;
+};
+
+#define HDMI_MAX_RATES 7
+#define HDMI_MAX_SAMPLE_SIZE 3
+#define HDMI_MAX_CHANNEL_CONSTRAINTS 4
+
+#define MXC_HDMI_RATES_PLAYBACK \
+ (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)
+
+#define MXC_HDMI_FORMATS_PLAYBACK \
+ (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+
+union hdmi_audio_header_t {
+ uint64_t U;
+ struct {
+ unsigned consumer:1;
+ unsigned linear_pcm:1;
+ unsigned copyright:1;
+ unsigned pre_emphasis:3;
+ unsigned mode:2;
+
+ unsigned category_code:8;
+
+ unsigned source:4;
+ unsigned channel:4;
+
+ unsigned sample_freq:4;
+ unsigned clock_acc:2;
+ unsigned reserved0:2;
+
+ unsigned word_length:4;
+ unsigned org_sample_freq:4;
+
+ unsigned cgms_a:2;
+ unsigned reserved1:6;
+
+ unsigned reserved2:8;
+
+ unsigned reserved3:8;
+ } B;
+ unsigned char status[8];
+};
+
+union hdmi_audio_dma_data_t {
+ uint32_t U;
+ struct {
+ unsigned data:24;
+ unsigned v:1;
+ unsigned u:1;
+ unsigned c:1;
+ unsigned p:1;
+ unsigned b:1;
+ unsigned reserved:3;
+ } B;
+};
+
+extern union hdmi_audio_header_t iec_header;
+
+#define hdmi_audio_writeb(reg, bit, val) \
+ do { \
+ hdmi_mask_writeb(val, HDMI_ ## reg, \
+ HDMI_ ## reg ## _ ## bit ## _OFFSET, \
+ HDMI_ ## reg ## _ ## bit ## _MASK); \
+ pr_debug("Set reg: HDMI_" #reg " (0x%x) "\
+ "bit: HDMI_" #reg "_" #bit " (%d) to val: %x\n", \
+ HDMI_ ## reg, HDMI_ ## reg ## _ ## bit ## _OFFSET, val); \
+ } while (0)
+
+#endif /* __IMX_HDMI_H */
projects / karo-tx-linux.git / commitdiff