Merge tag 'staging-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO updates from Greg KH:
 "Here is the big staging tree update for 4.12-rc1.

  It's a big one, adding about 350k new lines of crap^Wcode, mostly all
  in a big dump of media drivers from Intel. But there's other new
  drivers in here as well, yet-another-wifi driver, new IIO drivers, and
  a new crypto accelerator.

  We also deleted a bunch of stuff, mostly in patch cleanups, but also
  the Android ION code has shrunk a lot, and the Android low memory
  killer driver was finally deleted, much to the celebration of the -mm
  developers.

  All of these have been in linux-next with a few build issues that will
  show up when you merge to your tree"

Merge conflicts in the new rtl8723bs driver (due to the wifi changes
this merge window) handled as per linux-next, courtesy of Stephen
Rothwell.

* tag 'staging-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1182 commits)
  staging: fsl-mc/dpio: add cpu <--> LE conversion for dpaa2_fd
  staging: ks7010: remove line continuations in quoted strings
  staging: vt6656: use tabs instead of spaces
  staging: android: ion: Fix unnecessary initialization of static variable
  staging: media: atomisp: fix range checking on clk_num
  staging: media: atomisp: fix misspelled word in comment
  staging: media: atomisp: kmap() can't fail
  staging: atomisp: remove #ifdef for runtime PM functions
  staging: atomisp: satm include directory is gone
  atomisp: remove some more unused files
  atomisp: remove hmm_load/store/clear indirections
  atomisp: kill off mmgr_free
  atomisp: clean up the hmm init/cleanup indirections
  atomisp: handle allocation calls before init in the hmm layer
  staging: fsl-dpaa2/eth: Add maintainer for Ethernet driver
  staging: fsl-dpaa2/eth: Add TODO file
  staging: fsl-dpaa2/eth: Add trace points
  staging: fsl-dpaa2/eth: Add driver specific stats
  staging: fsl-dpaa2/eth: Add ethtool support
  staging: fsl-dpaa2/eth: Add Freescale DPAA2 Ethernet driver
  ...

1 files changed, 568 insertions, 0 deletions

diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
new file mode 100644
index 0000000..e8cf0b9
--- /dev/null
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
@@ -0,0 +1,568 @@
+/*****************************************************************************
+ * Copyright 2011 Broadcom Corporation.  All rights reserved.
+ *
+ * Unless you and Broadcom execute a separate written software license
+ * agreement governing use of this software, this software is licensed to you
+ * under the terms of the GNU General Public License version 2, available at
+ * http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+ *
+ * Notwithstanding the above, under no circumstances may you combine this
+ * software in any way with any other Broadcom software provided under a
+ * license other than the GPL, without Broadcom's express prior written
+ * consent.
+ *****************************************************************************/
+
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+#include <sound/asoundef.h>
+
+#include "bcm2835.h"
+
+/* hardware definition */
+static struct snd_pcm_hardware snd_bcm2835_playback_hw = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+	SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
+	.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min = 8000,
+	.rate_max = 48000,
+	.channels_min = 1,
+	.channels_max = 2,
+	.buffer_bytes_max = 128 * 1024,
+	.period_bytes_min = 1 * 1024,
+	.period_bytes_max = 128 * 1024,
+	.periods_min = 1,
+	.periods_max = 128,
+};
+
+static struct snd_pcm_hardware snd_bcm2835_playback_spdif_hw = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+	SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_44100 |
+	SNDRV_PCM_RATE_48000,
+	.rate_min = 44100,
+	.rate_max = 48000,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = 128 * 1024,
+	.period_bytes_min = 1 * 1024,
+	.period_bytes_max = 128 * 1024,
+	.periods_min = 1,
+	.periods_max = 128,
+};
+
+static void snd_bcm2835_playback_free(struct snd_pcm_runtime *runtime)
+{
+	audio_info("Freeing up alsa stream here ..\n");
+	kfree(runtime->private_data);
+	runtime->private_data = NULL;
+}
+
+void bcm2835_playback_fifo(struct bcm2835_alsa_stream *alsa_stream)
+{
+	unsigned int consumed = 0;
+	int new_period = 0;
+
+
+	audio_info("alsa_stream=%p substream=%p\n", alsa_stream,
+		alsa_stream ? alsa_stream->substream : 0);
+
+	if (alsa_stream->open)
+		consumed = bcm2835_audio_retrieve_buffers(alsa_stream);
+
+	/* We get called only if playback was triggered, So, the number of buffers we retrieve in
+	 * each iteration are the buffers that have been played out already
+	 */
+
+	if (alsa_stream->period_size) {
+		if ((alsa_stream->pos / alsa_stream->period_size) !=
+			((alsa_stream->pos + consumed) / alsa_stream->period_size))
+			new_period = 1;
+	}
+	audio_debug("updating pos cur: %d + %d max:%d period_bytes:%d, hw_ptr: %d new_period:%d\n",
+		alsa_stream->pos,
+		consumed,
+		alsa_stream->buffer_size,
+		(int) (alsa_stream->period_size * alsa_stream->substream->runtime->periods),
+		frames_to_bytes(alsa_stream->substream->runtime, alsa_stream->substream->runtime->status->hw_ptr),
+		new_period);
+	if (alsa_stream->buffer_size) {
+		alsa_stream->pos += consumed & ~(1 << 30);
+		alsa_stream->pos %= alsa_stream->buffer_size;
+	}
+
+	if (alsa_stream->substream) {
+		if (new_period)
+			snd_pcm_period_elapsed(alsa_stream->substream);
+	} else {
+		audio_warning(" unexpected NULL substream\n");
+	}
+}
+
+/* open callback */
+static int snd_bcm2835_playback_open_generic(
+	struct snd_pcm_substream *substream, int spdif)
+{
+	struct bcm2835_chip *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream;
+	int idx;
+	int err;
+
+
+	if (mutex_lock_interruptible(&chip->audio_mutex)) {
+		audio_error("Interrupted whilst waiting for lock\n");
+		return -EINTR;
+	}
+	audio_info("Alsa open (%d)\n", substream->number);
+	idx = substream->number;
+
+	if (spdif && chip->opened) {
+		err = -EBUSY;
+		goto out;
+	} else if (!spdif && (chip->opened & (1 << idx))) {
+		err = -EBUSY;
+		goto out;
+	}
+	if (idx >= MAX_SUBSTREAMS) {
+		audio_error
+			("substream(%d) device doesn't exist max(%d) substreams allowed\n",
+			idx, MAX_SUBSTREAMS);
+		err = -ENODEV;
+		goto out;
+	}
+
+	/* Check if we are ready */
+	if (!(chip->avail_substreams & (1 << idx))) {
+		/* We are not ready yet */
+		audio_error("substream(%d) device is not ready yet\n", idx);
+		err = -EAGAIN;
+		goto out;
+	}
+
+	alsa_stream = kzalloc(sizeof(*alsa_stream), GFP_KERNEL);
+	if (!alsa_stream) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	/* Initialise alsa_stream */
+	alsa_stream->chip = chip;
+	alsa_stream->substream = substream;
+	alsa_stream->idx = idx;
+
+	spin_lock_init(&alsa_stream->lock);
+
+	err = bcm2835_audio_open(alsa_stream);
+	if (err) {
+		kfree(alsa_stream);
+		goto out;
+	}
+	runtime->private_data = alsa_stream;
+	runtime->private_free = snd_bcm2835_playback_free;
+	if (spdif) {
+		runtime->hw = snd_bcm2835_playback_spdif_hw;
+	} else {
+		/* clear spdif status, as we are not in spdif mode */
+		chip->spdif_status = 0;
+		runtime->hw = snd_bcm2835_playback_hw;
+	}
+	/* minimum 16 bytes alignment (for vchiq bulk transfers) */
+	snd_pcm_hw_constraint_step(runtime,
+				   0,
+				   SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+				   16);
+
+	chip->alsa_stream[idx] = alsa_stream;
+
+	chip->opened |= (1 << idx);
+	alsa_stream->open = 1;
+	alsa_stream->draining = 1;
+
+out:
+	mutex_unlock(&chip->audio_mutex);
+
+
+	return err;
+}
+
+static int snd_bcm2835_playback_open(struct snd_pcm_substream *substream)
+{
+	return snd_bcm2835_playback_open_generic(substream, 0);
+}
+
+static int snd_bcm2835_playback_spdif_open(struct snd_pcm_substream *substream)
+{
+	return snd_bcm2835_playback_open_generic(substream, 1);
+}
+
+/* close callback */
+static int snd_bcm2835_playback_close(struct snd_pcm_substream *substream)
+{
+	/* the hardware-specific codes will be here */
+
+	struct bcm2835_chip *chip;
+	struct snd_pcm_runtime *runtime;
+	struct bcm2835_alsa_stream *alsa_stream;
+
+
+	chip = snd_pcm_substream_chip(substream);
+	if (mutex_lock_interruptible(&chip->audio_mutex)) {
+		audio_error("Interrupted whilst waiting for lock\n");
+		return -EINTR;
+	}
+	runtime = substream->runtime;
+	alsa_stream = runtime->private_data;
+
+	audio_info("Alsa close\n");
+
+	/*
+	 * Call stop if it's still running. This happens when app
+	 * is force killed and we don't get a stop trigger.
+	 */
+	if (alsa_stream->running) {
+		int err;
+		err = bcm2835_audio_stop(alsa_stream);
+		alsa_stream->running = 0;
+		if (err)
+			audio_error(" Failed to STOP alsa device\n");
+	}
+
+	alsa_stream->period_size = 0;
+	alsa_stream->buffer_size = 0;
+
+	if (alsa_stream->open) {
+		alsa_stream->open = 0;
+		bcm2835_audio_close(alsa_stream);
+	}
+	if (alsa_stream->chip)
+		alsa_stream->chip->alsa_stream[alsa_stream->idx] = NULL;
+	/*
+	 * Do not free up alsa_stream here, it will be freed up by
+	 * runtime->private_free callback we registered in *_open above
+	 */
+
+	chip->opened &= ~(1 << substream->number);
+
+	mutex_unlock(&chip->audio_mutex);
+
+	return 0;
+}
+
+/* hw_params callback */
+static int snd_bcm2835_pcm_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
+	int err;
+
+
+	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+	if (err < 0) {
+		audio_error
+			(" pcm_lib_malloc failed to allocated pages for buffers\n");
+		return err;
+	}
+
+	alsa_stream->channels = params_channels(params);
+	alsa_stream->params_rate = params_rate(params);
+	alsa_stream->pcm_format_width = snd_pcm_format_width(params_format(params));
+
+	return err;
+}
+
+/* hw_free callback */
+static int snd_bcm2835_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+/* prepare callback */
+static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	struct bcm2835_chip *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
+	int channels;
+	int err;
+
+
+	if (mutex_lock_interruptible(&chip->audio_mutex))
+		return -EINTR;
+
+	/* notify the vchiq that it should enter spdif passthrough mode by
+	 * setting channels=0 (see
+	 * https://github.com/raspberrypi/linux/issues/528) */
+	if (chip->spdif_status & IEC958_AES0_NONAUDIO)
+		channels = 0;
+	else
+		channels = alsa_stream->channels;
+
+	err = bcm2835_audio_set_params(alsa_stream, channels,
+		alsa_stream->params_rate,
+		alsa_stream->pcm_format_width);
+	if (err < 0)
+		audio_error(" error setting hw params\n");
+
+
+	bcm2835_audio_setup(alsa_stream);
+
+	/* in preparation of the stream, set the controls (volume level) of the stream */
+	bcm2835_audio_set_ctls(alsa_stream->chip);
+
+
+	memset(&alsa_stream->pcm_indirect, 0, sizeof(alsa_stream->pcm_indirect));
+
+	alsa_stream->pcm_indirect.hw_buffer_size =
+		alsa_stream->pcm_indirect.sw_buffer_size =
+		snd_pcm_lib_buffer_bytes(substream);
+
+	alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream);
+	alsa_stream->period_size = snd_pcm_lib_period_bytes(substream);
+	alsa_stream->pos = 0;
+
+	audio_debug("buffer_size=%d, period_size=%d pos=%d frame_bits=%d\n",
+		alsa_stream->buffer_size, alsa_stream->period_size,
+		alsa_stream->pos, runtime->frame_bits);
+
+	mutex_unlock(&chip->audio_mutex);
+	return 0;
+}
+
+static void snd_bcm2835_pcm_transfer(struct snd_pcm_substream *substream,
+	struct snd_pcm_indirect *rec, size_t bytes)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
+	void *src = (void *) (substream->runtime->dma_area + rec->sw_data);
+	int err;
+
+	err = bcm2835_audio_write(alsa_stream, bytes, src);
+	if (err)
+		audio_error(" Failed to transfer to alsa device (%d)\n", err);
+
+}
+
+static int snd_bcm2835_pcm_ack(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
+	struct snd_pcm_indirect *pcm_indirect = &alsa_stream->pcm_indirect;
+
+	pcm_indirect->hw_queue_size = runtime->hw.buffer_bytes_max;
+	snd_pcm_indirect_playback_transfer(substream, pcm_indirect,
+					   snd_bcm2835_pcm_transfer);
+	return 0;
+}
+
+/* trigger callback */
+static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
+	int err = 0;
+
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		audio_debug("bcm2835_AUDIO_TRIGGER_START running=%d\n",
+			alsa_stream->running);
+		if (!alsa_stream->running) {
+			err = bcm2835_audio_start(alsa_stream);
+			if (!err) {
+				alsa_stream->pcm_indirect.hw_io =
+					alsa_stream->pcm_indirect.hw_data =
+					bytes_to_frames(runtime,
+					alsa_stream->pos);
+				substream->ops->ack(substream);
+				alsa_stream->running = 1;
+				alsa_stream->draining = 1;
+			} else {
+				audio_error(" Failed to START alsa device (%d)\n", err);
+			}
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		audio_debug
+			("bcm2835_AUDIO_TRIGGER_STOP running=%d draining=%d\n",
+			alsa_stream->running, runtime->status->state == SNDRV_PCM_STATE_DRAINING);
+		if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
+			audio_info("DRAINING\n");
+			alsa_stream->draining = 1;
+		} else {
+			audio_info("DROPPING\n");
+			alsa_stream->draining = 0;
+		}
+		if (alsa_stream->running) {
+			err = bcm2835_audio_stop(alsa_stream);
+			if (err != 0)
+				audio_error(" Failed to STOP alsa device (%d)\n", err);
+			alsa_stream->running = 0;
+		}
+		break;
+	default:
+		err = -EINVAL;
+	}
+
+	return err;
+}
+
+/* pointer callback */
+static snd_pcm_uframes_t
+snd_bcm2835_pcm_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
+
+
+	audio_debug("pcm_pointer... (%d) hwptr=%d appl=%d pos=%d\n", 0,
+		frames_to_bytes(runtime, runtime->status->hw_ptr),
+		frames_to_bytes(runtime, runtime->control->appl_ptr),
+		alsa_stream->pos);
+
+	return snd_pcm_indirect_playback_pointer(substream,
+		&alsa_stream->pcm_indirect,
+		alsa_stream->pos);
+}
+
+static int snd_bcm2835_pcm_lib_ioctl(struct snd_pcm_substream *substream,
+	unsigned int cmd, void *arg)
+{
+	int ret = snd_pcm_lib_ioctl(substream, cmd, arg);
+
+	audio_info(" .. substream=%p, cmd=%d, arg=%p (%x) ret=%d\n", substream,
+		cmd, arg, arg ? *(unsigned *) arg : 0, ret);
+	return ret;
+}
+
+/* operators */
+static struct snd_pcm_ops snd_bcm2835_playback_ops = {
+	.open = snd_bcm2835_playback_open,
+	.close = snd_bcm2835_playback_close,
+	.ioctl = snd_bcm2835_pcm_lib_ioctl,
+	.hw_params = snd_bcm2835_pcm_hw_params,
+	.hw_free = snd_bcm2835_pcm_hw_free,
+	.prepare = snd_bcm2835_pcm_prepare,
+	.trigger = snd_bcm2835_pcm_trigger,
+	.pointer = snd_bcm2835_pcm_pointer,
+	.ack = snd_bcm2835_pcm_ack,
+};
+
+static struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = {
+	.open = snd_bcm2835_playback_spdif_open,
+	.close = snd_bcm2835_playback_close,
+	.ioctl = snd_bcm2835_pcm_lib_ioctl,
+	.hw_params = snd_bcm2835_pcm_hw_params,
+	.hw_free = snd_bcm2835_pcm_hw_free,
+	.prepare = snd_bcm2835_pcm_prepare,
+	.trigger = snd_bcm2835_pcm_trigger,
+	.pointer = snd_bcm2835_pcm_pointer,
+	.ack = snd_bcm2835_pcm_ack,
+};
+
+/* create a pcm device */
+int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	mutex_init(&chip->audio_mutex);
+	if (mutex_lock_interruptible(&chip->audio_mutex)) {
+		audio_error("Interrupted whilst waiting for lock\n");
+		return -EINTR;
+	}
+	err = snd_pcm_new(chip->card, "bcm2835 ALSA", 0, numchannels, 0, &pcm);
+	if (err < 0)
+		goto out;
+	pcm->private_data = chip;
+	strcpy(pcm->name, "bcm2835 ALSA");
+	chip->pcm = pcm;
+	chip->dest = AUDIO_DEST_AUTO;
+	chip->volume = alsa2chip(0);
+	chip->mute = CTRL_VOL_UNMUTE; /*disable mute on startup */
+	/* set operators */
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_bcm2835_playback_ops);
+
+	/* pre-allocation of buffers */
+	/* NOTE: this may fail */
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+					      snd_dma_continuous_data(GFP_KERNEL),
+					      snd_bcm2835_playback_hw.buffer_bytes_max,
+					      snd_bcm2835_playback_hw.buffer_bytes_max);
+
+
+out:
+	mutex_unlock(&chip->audio_mutex);
+
+	return 0;
+}
+
+int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	if (mutex_lock_interruptible(&chip->audio_mutex)) {
+		audio_error("Interrupted whilst waiting for lock\n");
+		return -EINTR;
+	}
+	err = snd_pcm_new(chip->card, "bcm2835 ALSA", 1, 1, 0, &pcm);
+	if (err < 0)
+		goto out;
+
+	pcm->private_data = chip;
+	strcpy(pcm->name, "bcm2835 IEC958/HDMI");
+	chip->pcm_spdif = pcm;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_bcm2835_playback_spdif_ops);
+
+	/* pre-allocation of buffers */
+	/* NOTE: this may fail */
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+		snd_dma_continuous_data(GFP_KERNEL),
+		snd_bcm2835_playback_spdif_hw.buffer_bytes_max, snd_bcm2835_playback_spdif_hw.buffer_bytes_max);
+out:
+	mutex_unlock(&chip->audio_mutex);
+
+	return 0;
+}
+
+int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip,
+			       const char *name,
+			       enum snd_bcm2835_route route,
+			       u32 numchannels)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	mutex_init(&chip->audio_mutex);
+
+	err = snd_pcm_new(chip->card, name, 0, numchannels,
+			  0, &pcm);
+	if (err)
+		return err;
+
+	pcm->private_data = chip;
+	strcpy(pcm->name, name);
+	chip->pcm = pcm;
+	chip->dest = route;
+	chip->volume = alsa2chip(0);
+	chip->mute = CTRL_VOL_UNMUTE;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_bcm2835_playback_ops);
+
+	snd_pcm_lib_preallocate_pages_for_all(
+		pcm,
+		SNDRV_DMA_TYPE_CONTINUOUS,
+		snd_dma_continuous_data(GFP_KERNEL),
+		snd_bcm2835_playback_hw.buffer_bytes_max,
+		snd_bcm2835_playback_hw.buffer_bytes_max);
+
+	return 0;
+}
+