openwrtv3/target/linux/brcm2708/patches-4.9/950-0117-pisound-improvements.patch
Rafał Miłecki fce21ae4cc brcm2708: rename all patches from raspberrypi git tree to use 950 prefix
Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>
2017-03-24 08:06:35 +01:00

294 lines
7.2 KiB
Diff

From 8ed8e29b19dba95a7a6c2364c2bb32d926601713 Mon Sep 17 00:00:00 2001
From: Giedrius Trainavicius <giedrius@blokas.io>
Date: Thu, 5 Jan 2017 02:38:16 +0200
Subject: [PATCH] pisound improvements:
* Added a writable sysfs object to enable scripts / user space software
to blink MIDI activity LEDs for variable duration.
* Improved hw_param constraints setting.
* Added compatibility with S16_LE sample format.
* Exposed some simple placeholder volume controls, so the card appears
in volumealsa widget.
Signed-off-by: Giedrius Trainavicius <giedrius@blokas.io>
---
sound/soc/bcm/pisound.c | 175 ++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 154 insertions(+), 21 deletions(-)
--- a/sound/soc/bcm/pisound.c
+++ b/sound/soc/bcm/pisound.c
@@ -36,6 +36,7 @@
#include <sound/jack.h>
#include <sound/rawmidi.h>
#include <sound/asequencer.h>
+#include <sound/control.h>
static int pisnd_spi_init(struct device *dev);
static void pisnd_spi_uninit(void);
@@ -214,6 +215,9 @@ static char g_serial_num[11];
static char g_id[25];
static char g_version[5];
+static uint8_t g_ledFlashDuration;
+static bool g_ledFlashDurationChanged;
+
DEFINE_KFIFO(spi_fifo_in, uint8_t, FIFO_SIZE);
DEFINE_KFIFO(spi_fifo_out, uint8_t, FIFO_SIZE);
@@ -396,8 +400,13 @@ static void pisnd_work_handler(struct wo
val = 0;
tx = 0;
- if (kfifo_get(&spi_fifo_out, &val))
+ if (g_ledFlashDurationChanged) {
+ tx = 0xf000 | g_ledFlashDuration;
+ g_ledFlashDuration = 0;
+ g_ledFlashDurationChanged = false;
+ } else if (kfifo_get(&spi_fifo_out, &val)) {
tx = 0x0f00 | val;
+ }
rx = spi_transfer16(tx);
@@ -410,6 +419,7 @@ static void pisnd_work_handler(struct wo
} while (rx != 0
|| !kfifo_is_empty(&spi_fifo_out)
|| pisnd_spi_has_more()
+ || g_ledFlashDurationChanged
);
if (!kfifo_is_empty(&spi_fifo_in) && g_recvCallback)
@@ -569,7 +579,7 @@ static int pisnd_spi_init(struct device
}
/* Flash the LEDs. */
- spi_transfer16(0xf000);
+ spi_transfer16(0xf008);
ret = pisnd_spi_gpio_irq_init(dev);
if (ret < 0) {
@@ -610,6 +620,14 @@ static void pisnd_spi_uninit(void)
pisnd_spi_gpio_uninit();
}
+static void pisnd_spi_flash_leds(uint8_t duration)
+{
+ g_ledFlashDuration = duration;
+ g_ledFlashDurationChanged = true;
+ printd("schedule from spi_flash_leds\n");
+ pisnd_schedule_process(TASK_PROCESS);
+}
+
static void pisnd_spi_send(uint8_t val)
{
kfifo_put(&spi_fifo_out, val);
@@ -658,6 +676,83 @@ static const struct of_device_id pisound
{},
};
+enum {
+ SWITCH = 0,
+ VOLUME = 1,
+};
+
+static int pisnd_ctl_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ if (kcontrol->private_value == SWITCH) {
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+ return 0;
+ } else if (kcontrol->private_value == VOLUME) {
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 100;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int pisnd_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ if (kcontrol->private_value == SWITCH) {
+ ucontrol->value.integer.value[0] = 1;
+ return 0;
+ } else if (kcontrol->private_value == VOLUME) {
+ ucontrol->value.integer.value[0] = 100;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static struct snd_kcontrol_new pisnd_ctl[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Switch",
+ .index = 0,
+ .private_value = SWITCH,
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ .info = pisnd_ctl_info,
+ .get = pisnd_ctl_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Volume",
+ .index = 0,
+ .private_value = VOLUME,
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ .info = pisnd_ctl_info,
+ .get = pisnd_ctl_get,
+ },
+};
+
+static int pisnd_ctl_init(struct snd_card *card)
+{
+ int err, i;
+
+ for (i = 0; i < ARRAY_SIZE(pisnd_ctl); ++i) {
+ err = snd_ctl_add(card, snd_ctl_new1(&pisnd_ctl[i], NULL));
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int pisnd_ctl_uninit(void)
+{
+ return 0;
+}
+
static struct gpio_desc *osr0, *osr1, *osr2;
static struct gpio_desc *reset;
static struct gpio_desc *button;
@@ -667,6 +762,14 @@ static int pisnd_hw_params(
struct snd_pcm_hw_params *params
)
{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+ /* pisound runs on fixed 32 clock counts per channel,
+ * as generated by the master ADC.
+ */
+ snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);
+
printd("rate = %d\n", params_rate(params));
printd("ch = %d\n", params_channels(params));
printd("bits = %u\n",
@@ -711,16 +814,6 @@ static struct snd_pcm_hw_constraint_list
.mask = 0,
};
-static unsigned int sample_bits[] = {
- 24, 32
-};
-
-static struct snd_pcm_hw_constraint_list constraints_sample_bits = {
- .count = ARRAY_SIZE(sample_bits),
- .list = sample_bits,
- .mask = 0,
-};
-
static int pisnd_startup(struct snd_pcm_substream *substream)
{
int err = snd_pcm_hw_constraint_list(
@@ -733,11 +826,21 @@ static int pisnd_startup(struct snd_pcm_
if (err < 0)
return err;
- err = snd_pcm_hw_constraint_list(
+ err = snd_pcm_hw_constraint_single(
substream->runtime,
- 0,
- SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
- &constraints_sample_bits
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ 2
+ );
+
+ if (err < 0)
+ return err;
+
+ err = snd_pcm_hw_constraint_mask64(
+ substream->runtime,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE
);
if (err < 0)
@@ -771,14 +874,23 @@ static int pisnd_card_probe(struct snd_s
{
int err = pisnd_midi_init(card->snd_card);
- if (err < 0)
+ if (err < 0) {
printe("pisnd_midi_init failed: %d\n", err);
+ return err;
+ }
- return err;
+ err = pisnd_ctl_init(card->snd_card);
+ if (err < 0) {
+ printe("pisnd_ctl_init failed: %d\n", err);
+ return err;
+ }
+
+ return 0;
}
static int pisnd_card_remove(struct snd_soc_card *card)
{
+ pisnd_ctl_uninit();
pisnd_midi_uninit();
return 0;
}
@@ -870,17 +982,38 @@ static ssize_t pisnd_version_show(
return sprintf(buf, "%s\n", pisnd_spi_get_version());
}
+static ssize_t pisnd_led_store(
+ struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf,
+ size_t length
+ )
+{
+ uint32_t timeout;
+ int err;
+
+ err = kstrtou32(buf, 10, &timeout);
+
+ if (err == 0 && timeout <= 255)
+ pisnd_spi_flash_leds(timeout);
+
+ return length;
+}
+
static struct kobj_attribute pisnd_serial_attribute =
- __ATTR(serial, 0644, pisnd_serial_show, NULL);
+ __ATTR(serial, 0444, pisnd_serial_show, NULL);
static struct kobj_attribute pisnd_id_attribute =
- __ATTR(id, 0644, pisnd_id_show, NULL);
+ __ATTR(id, 0444, pisnd_id_show, NULL);
static struct kobj_attribute pisnd_version_attribute =
- __ATTR(version, 0644, pisnd_version_show, NULL);
+ __ATTR(version, 0444, pisnd_version_show, NULL);
+static struct kobj_attribute pisnd_led_attribute =
+ __ATTR(led, 0644, NULL, pisnd_led_store);
static struct attribute *attrs[] = {
&pisnd_serial_attribute.attr,
&pisnd_id_attribute.attr,
&pisnd_version_attribute.attr,
+ &pisnd_led_attribute.attr,
NULL
};