mirror of https://github.com/hak5/openwrt-owl.git
1169 lines
26 KiB
Diff
1169 lines
26 KiB
Diff
From aa46aa94c5ca5683fd815c57a78ea5fb05e7c3e5 Mon Sep 17 00:00:00 2001
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From: gtrainavicius <gtrainavicius@users.noreply.github.com>
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Date: Sun, 23 Oct 2016 12:06:53 +0300
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Subject: [PATCH] Support for Blokas Labs pisound board
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Pisound dynamic overlay (#1760)
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Restructuring pisound-overlay.dts, so it can be loaded and unloaded dynamically using dtoverlay.
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Print a logline when the kernel module is removed.
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---
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.../devicetree/bindings/vendor-prefixes.txt | 1 +
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arch/arm/boot/dts/overlays/pisound-overlay.dts | 94 +-
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sound/soc/bcm/Kconfig | 6 +
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sound/soc/bcm/Makefile | 2 +
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sound/soc/bcm/pisound.c | 989 +++++++++++++++++++++
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5 files changed, 1048 insertions(+), 44 deletions(-)
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create mode 100644 sound/soc/bcm/pisound.c
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--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
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+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
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@@ -40,6 +40,7 @@ auvidea Auvidea GmbH
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avago Avago Technologies
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avic Shanghai AVIC Optoelectronics Co., Ltd.
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axis Axis Communications AB
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+blokaslabs Vilniaus Blokas UAB
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boe BOE Technology Group Co., Ltd.
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bosch Bosch Sensortec GmbH
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boundary Boundary Devices Inc.
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--- a/arch/arm/boot/dts/overlays/pisound-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/pisound-overlay.dts
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@@ -26,6 +26,54 @@
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compatible = "brcm,bcm2708";
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fragment@0 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&spidev0>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&spidev1>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ pisound_spi: pisound_spi@0{
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+ compatible = "blokaslabs,pisound-spi";
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+ reg = <0>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&spi0_pins>;
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+ spi-max-frequency = <1000000>;
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+ };
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+ };
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+ };
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+
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+ fragment@4 {
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+ target-path = "/";
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+ __overlay__ {
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+ pcm5102a-codec {
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+ #sound-dai-cells = <0>;
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+ compatible = "ti,pcm5102a";
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+ status = "okay";
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+ };
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+ };
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+ };
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+
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+ fragment@5 {
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target = <&sound>;
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__overlay__ {
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compatible = "blokaslabs,pisound";
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@@ -49,7 +97,7 @@
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};
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};
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- fragment@1 {
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+ fragment@6 {
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target = <&gpio>;
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__overlay__ {
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pinctrl-names = "default";
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@@ -63,52 +111,10 @@
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};
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};
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- fragment@2 {
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+ fragment@7 {
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target = <&i2s>;
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__overlay__ {
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status = "okay";
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};
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};
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-
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- fragment@3 {
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- target-path = "/";
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- __overlay__ {
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- pcm5102a-codec {
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- #sound-dai-cells = <0>;
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- compatible = "ti,pcm5102a";
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- status = "okay";
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- };
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- };
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- };
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-
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- fragment@4 {
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- target = <&spi0>;
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- __overlay__ {
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- status = "okay";
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-
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- spidev@0{
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- status = "disabled";
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- };
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-
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- spidev@1{
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- status = "okay";
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- };
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- };
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- };
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-
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- fragment@5 {
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- target = <&spi0>;
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- __overlay__ {
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- #address-cells = <1>;
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- #size-cells = <0>;
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-
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- pisound_spi: pisound_spi@0{
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- compatible = "blokaslabs,pisound-spi";
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- reg = <0>;
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- pinctrl-names = "default";
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- pinctrl-0 = <&spi0_pins>;
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- spi-max-frequency = <1000000>;
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- };
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- };
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- };
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};
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--- a/sound/soc/bcm/Kconfig
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+++ b/sound/soc/bcm/Kconfig
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@@ -123,3 +123,9 @@ config SND_BCM2708_SOC_ALLO_PIANO_DAC
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select SND_SOC_PCM512x_I2C
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help
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Say Y or M if you want to add support for Allo Piano DAC.
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+
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+config SND_PISOUND
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+ tristate "Support for Blokas Labs pisound"
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+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
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+ help
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+ Say Y or M if you want to add support for Blokas Labs pisound.
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--- a/sound/soc/bcm/Makefile
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+++ b/sound/soc/bcm/Makefile
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@@ -24,6 +24,7 @@ snd-soc-audioinjector-pi-soundcard-objs
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snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
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snd-soc-dionaudio-loco-objs := dionaudio_loco.o
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snd-soc-allo-piano-dac-objs := allo-piano-dac.o
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+snd-soc-pisound-objs := pisound.o
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obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
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obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
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@@ -40,3 +41,4 @@ obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDC
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obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
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obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
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obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
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+obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
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--- /dev/null
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+++ b/sound/soc/bcm/pisound.c
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@@ -0,0 +1,989 @@
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+/*
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+ * pisound Linux kernel module.
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+ * Copyright (C) 2016 Vilniaus Blokas UAB, http://blokas.io/pisound
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; version 2 of the
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+ * License.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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+ * MA 02110-1301, USA.
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+ */
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+
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+#include <linux/init.h>
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+#include <linux/module.h>
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+#include <linux/platform_device.h>
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+#include <linux/gpio.h>
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+#include <linux/kobject.h>
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+#include <linux/sysfs.h>
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+#include <linux/delay.h>
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+#include <linux/spi/spi.h>
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+#include <linux/interrupt.h>
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+#include <linux/kfifo.h>
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+
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+#include <sound/pcm_params.h>
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+#include <sound/soc.h>
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+#include <sound/jack.h>
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+#include <sound/rawmidi.h>
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+#include <sound/asequencer.h>
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+
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+static int pisnd_spi_init(struct device *dev);
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+static void pisnd_spi_uninit(void);
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+
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+static void pisnd_spi_send(uint8_t val);
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+static uint8_t pisnd_spi_recv(uint8_t *buffer, uint8_t length);
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+
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+typedef void (*pisnd_spi_recv_cb)(void *data);
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+static void pisnd_spi_set_callback(pisnd_spi_recv_cb cb, void *data);
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+
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+static const char *pisnd_spi_get_serial(void);
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+static const char *pisnd_spi_get_id(void);
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+static const char *pisnd_spi_get_version(void);
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+
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+static int pisnd_midi_init(struct snd_card *card);
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+static void pisnd_midi_uninit(void);
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+
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+#define PISOUND_LOG_PREFIX "pisound: "
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+
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+#ifdef DEBUG
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+# define printd(...) pr_alert(PISOUND_LOG_PREFIX __VA_ARGS__)
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+#else
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+# define printd(...) do {} while (0)
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+#endif
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+
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+#define printe(...) pr_err(PISOUND_LOG_PREFIX __VA_ARGS__)
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+#define printi(...) pr_info(PISOUND_LOG_PREFIX __VA_ARGS__)
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+
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+static int pisnd_output_open(struct snd_rawmidi_substream *substream)
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+{
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+ return 0;
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+}
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+
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+static int pisnd_output_close(struct snd_rawmidi_substream *substream)
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+{
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+ return 0;
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+}
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+
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+static void pisnd_output_trigger(
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+ struct snd_rawmidi_substream *substream,
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+ int up
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+ )
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+{
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+ uint8_t data;
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+
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+ if (!up)
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+ return;
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+
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+ while (snd_rawmidi_transmit_peek(substream, &data, 1)) {
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+ pisnd_spi_send(data);
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+ snd_rawmidi_transmit_ack(substream, 1);
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+ }
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+}
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+
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+static void pisnd_output_drain(struct snd_rawmidi_substream *substream)
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+{
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+ uint8_t data;
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+
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+ while (snd_rawmidi_transmit_peek(substream, &data, 1)) {
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+ pisnd_spi_send(data);
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+
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+ snd_rawmidi_transmit_ack(substream, 1);
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+ }
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+}
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+
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+static int pisnd_input_open(struct snd_rawmidi_substream *substream)
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+{
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+ return 0;
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+}
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+
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+static int pisnd_input_close(struct snd_rawmidi_substream *substream)
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+{
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+ return 0;
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+}
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+
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+static void pisnd_midi_recv_callback(void *substream)
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+{
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+ uint8_t data[128];
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+ uint8_t n = 0;
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+
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+ while ((n = pisnd_spi_recv(data, sizeof(data)))) {
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+ int res = snd_rawmidi_receive(substream, data, n);
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+ (void)res;
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+ printd("midi recv 0x%02x, res = %d\n", data, res);
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+ }
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+}
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+
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+static void pisnd_input_trigger(struct snd_rawmidi_substream *substream, int up)
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+{
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+ if (up) {
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+ pisnd_spi_set_callback(pisnd_midi_recv_callback, substream);
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+ pisnd_midi_recv_callback(substream);
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+ } else {
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+ pisnd_spi_set_callback(NULL, NULL);
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+ }
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+}
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+
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+static struct snd_rawmidi *g_rmidi;
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+
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+static struct snd_rawmidi_ops pisnd_output_ops = {
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+ .open = pisnd_output_open,
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+ .close = pisnd_output_close,
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+ .trigger = pisnd_output_trigger,
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+ .drain = pisnd_output_drain,
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+};
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+
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+static struct snd_rawmidi_ops pisnd_input_ops = {
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+ .open = pisnd_input_open,
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+ .close = pisnd_input_close,
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+ .trigger = pisnd_input_trigger,
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+};
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+
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+static void pisnd_get_port_info(
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+ struct snd_rawmidi *rmidi,
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+ int number,
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+ struct snd_seq_port_info *seq_port_info
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+ )
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+{
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+ seq_port_info->type =
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+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
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+ SNDRV_SEQ_PORT_TYPE_HARDWARE |
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+ SNDRV_SEQ_PORT_TYPE_PORT;
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+ seq_port_info->midi_voices = 0;
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+}
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+
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+static struct snd_rawmidi_global_ops pisnd_global_ops = {
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+ .get_port_info = pisnd_get_port_info,
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+};
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+
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+static int pisnd_midi_init(struct snd_card *card)
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+{
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+ int err = snd_rawmidi_new(card, "pisound MIDI", 0, 1, 1, &g_rmidi);
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+
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+ if (err < 0) {
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+ printe("snd_rawmidi_new failed: %d\n", err);
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+ return err;
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+ }
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+
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+ strcpy(g_rmidi->name, "pisound MIDI ");
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+ strcat(g_rmidi->name, pisnd_spi_get_serial());
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+
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+ g_rmidi->info_flags =
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+ SNDRV_RAWMIDI_INFO_OUTPUT |
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+ SNDRV_RAWMIDI_INFO_INPUT |
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+ SNDRV_RAWMIDI_INFO_DUPLEX;
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+
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+ g_rmidi->ops = &pisnd_global_ops;
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+
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+ g_rmidi->private_data = (void *)0;
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+
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+ snd_rawmidi_set_ops(
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+ g_rmidi,
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+ SNDRV_RAWMIDI_STREAM_OUTPUT,
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+ &pisnd_output_ops
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+ );
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+
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+ snd_rawmidi_set_ops(
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+ g_rmidi,
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+ SNDRV_RAWMIDI_STREAM_INPUT,
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+ &pisnd_input_ops
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+ );
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+
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+ return 0;
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+}
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+
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+static void pisnd_midi_uninit(void)
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+{
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+}
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+
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+static void *g_recvData;
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+static pisnd_spi_recv_cb g_recvCallback;
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+
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+#define FIFO_SIZE 512
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+
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+static char g_serial_num[11];
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+static char g_id[25];
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+static char g_version[5];
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+
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+DEFINE_KFIFO(spi_fifo_in, uint8_t, FIFO_SIZE);
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+DEFINE_KFIFO(spi_fifo_out, uint8_t, FIFO_SIZE);
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+
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+static struct gpio_desc *data_available;
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+static struct gpio_desc *spi_reset;
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+
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+static struct spi_device *pisnd_spi_device;
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+
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+static struct workqueue_struct *pisnd_workqueue;
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+static struct work_struct pisnd_work_process;
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+
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+static void pisnd_work_handler(struct work_struct *work);
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+
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+static uint16_t spi_transfer16(uint16_t val);
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+
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+static int pisnd_init_workqueues(void)
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+{
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+ pisnd_workqueue = create_singlethread_workqueue("pisnd_workqueue");
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+ INIT_WORK(&pisnd_work_process, pisnd_work_handler);
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+
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+ return 0;
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+}
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+
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+static void pisnd_uninit_workqueues(void)
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+{
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+ flush_workqueue(pisnd_workqueue);
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+ destroy_workqueue(pisnd_workqueue);
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+
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+ pisnd_workqueue = NULL;
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+}
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+
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+static bool pisnd_spi_has_more(void)
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+{
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+ return gpiod_get_value(data_available);
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+}
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+
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+enum task_e {
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+ TASK_PROCESS = 0,
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+};
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+
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+static void pisnd_schedule_process(enum task_e task)
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+{
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+ if (pisnd_spi_device != NULL &&
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+ pisnd_workqueue != NULL &&
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+ !work_pending(&pisnd_work_process)
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+ ) {
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+ printd("schedule: has more = %d\n", pisnd_spi_has_more());
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+ if (task == TASK_PROCESS)
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+ queue_work(pisnd_workqueue, &pisnd_work_process);
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+ }
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+}
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+
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+static irqreturn_t data_available_interrupt_handler(int irq, void *dev_id)
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+{
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+ if (irq == gpiod_to_irq(data_available) && pisnd_spi_has_more()) {
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+ printd("schedule from irq\n");
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+ pisnd_schedule_process(TASK_PROCESS);
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+ }
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+
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+ return IRQ_HANDLED;
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+}
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+
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+static DEFINE_SPINLOCK(spilock);
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+static unsigned long spilockflags;
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+
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+static uint16_t spi_transfer16(uint16_t val)
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+{
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+ int err;
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+ struct spi_transfer transfer;
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+ struct spi_message msg;
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+ uint8_t txbuf[2];
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+ uint8_t rxbuf[2];
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+
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+ if (!pisnd_spi_device) {
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+ printe("pisnd_spi_device null, returning\n");
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+ return 0;
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+ }
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+
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+ spi_message_init(&msg);
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+
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+ memset(&transfer, 0, sizeof(transfer));
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+ memset(&rxbuf, 0, sizeof(rxbuf));
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+
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+ txbuf[0] = val >> 8;
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+ txbuf[1] = val & 0xff;
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+
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+ transfer.tx_buf = &txbuf;
|
|
+ transfer.rx_buf = &rxbuf;
|
|
+ transfer.len = sizeof(txbuf);
|
|
+ transfer.speed_hz = 125000;
|
|
+ transfer.delay_usecs = 100;
|
|
+ spi_message_add_tail(&transfer, &msg);
|
|
+
|
|
+ spin_lock_irqsave(&spilock, spilockflags);
|
|
+ err = spi_sync(pisnd_spi_device, &msg);
|
|
+ spin_unlock_irqrestore(&spilock, spilockflags);
|
|
+
|
|
+ if (err < 0) {
|
|
+ printe("spi_sync error %d\n", err);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ printd("received: %02x%02x\n", rxbuf[0], rxbuf[1]);
|
|
+ printd("hasMore %d\n", pisnd_spi_has_more());
|
|
+
|
|
+ return (rxbuf[0] << 8) | rxbuf[1];
|
|
+}
|
|
+
|
|
+static int spi_read_bytes(char *dst, size_t length, uint8_t *bytesRead)
|
|
+{
|
|
+ uint16_t rx;
|
|
+ uint8_t size;
|
|
+ uint8_t i;
|
|
+
|
|
+ memset(dst, 0, length);
|
|
+ *bytesRead = 0;
|
|
+
|
|
+ rx = spi_transfer16(0);
|
|
+ if (!(rx >> 8))
|
|
+ return -EINVAL;
|
|
+
|
|
+ size = rx & 0xff;
|
|
+
|
|
+ if (size > length)
|
|
+ return -EINVAL;
|
|
+
|
|
+ for (i = 0; i < size; ++i) {
|
|
+ rx = spi_transfer16(0);
|
|
+ if (!(rx >> 8))
|
|
+ return -EINVAL;
|
|
+
|
|
+ dst[i] = rx & 0xff;
|
|
+ }
|
|
+
|
|
+ *bytesRead = i;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int spi_device_match(struct device *dev, void *data)
|
|
+{
|
|
+ struct spi_device *spi = container_of(dev, struct spi_device, dev);
|
|
+
|
|
+ printd(" %s %s %dkHz %d bits mode=0x%02X\n",
|
|
+ spi->modalias, dev_name(dev), spi->max_speed_hz/1000,
|
|
+ spi->bits_per_word, spi->mode);
|
|
+
|
|
+ if (strcmp("pisound-spi", spi->modalias) == 0) {
|
|
+ printi("\tFound!\n");
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ printe("\tNot found!\n");
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct spi_device *pisnd_spi_find_device(void)
|
|
+{
|
|
+ struct device *dev;
|
|
+
|
|
+ printi("Searching for spi device...\n");
|
|
+ dev = bus_find_device(&spi_bus_type, NULL, NULL, spi_device_match);
|
|
+ if (dev != NULL)
|
|
+ return container_of(dev, struct spi_device, dev);
|
|
+ else
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+static void pisnd_work_handler(struct work_struct *work)
|
|
+{
|
|
+ uint16_t rx;
|
|
+ uint16_t tx;
|
|
+ uint8_t val;
|
|
+
|
|
+ if (work == &pisnd_work_process) {
|
|
+ if (pisnd_spi_device == NULL)
|
|
+ return;
|
|
+
|
|
+ do {
|
|
+ val = 0;
|
|
+ tx = 0;
|
|
+
|
|
+ if (kfifo_get(&spi_fifo_out, &val))
|
|
+ tx = 0x0f00 | val;
|
|
+
|
|
+ rx = spi_transfer16(tx);
|
|
+
|
|
+ if (rx & 0xff00) {
|
|
+ kfifo_put(&spi_fifo_in, rx & 0xff);
|
|
+ if (kfifo_len(&spi_fifo_in) > 16
|
|
+ && g_recvCallback)
|
|
+ g_recvCallback(g_recvData);
|
|
+ }
|
|
+ } while (rx != 0
|
|
+ || !kfifo_is_empty(&spi_fifo_out)
|
|
+ || pisnd_spi_has_more()
|
|
+ );
|
|
+
|
|
+ if (!kfifo_is_empty(&spi_fifo_in) && g_recvCallback)
|
|
+ g_recvCallback(g_recvData);
|
|
+ }
|
|
+}
|
|
+
|
|
+static int pisnd_spi_gpio_init(struct device *dev)
|
|
+{
|
|
+ spi_reset = gpiod_get_index(dev, "reset", 1, GPIOD_ASIS);
|
|
+ data_available = gpiod_get_index(dev, "data_available", 0, GPIOD_ASIS);
|
|
+
|
|
+ gpiod_direction_output(spi_reset, 1);
|
|
+ gpiod_direction_input(data_available);
|
|
+
|
|
+ /* Reset the slave. */
|
|
+ gpiod_set_value(spi_reset, false);
|
|
+ mdelay(1);
|
|
+ gpiod_set_value(spi_reset, true);
|
|
+
|
|
+ /* Give time for spi slave to start. */
|
|
+ mdelay(64);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void pisnd_spi_gpio_uninit(void)
|
|
+{
|
|
+ gpiod_set_value(spi_reset, false);
|
|
+ gpiod_put(spi_reset);
|
|
+ spi_reset = NULL;
|
|
+
|
|
+ gpiod_put(data_available);
|
|
+ data_available = NULL;
|
|
+}
|
|
+
|
|
+static int pisnd_spi_gpio_irq_init(struct device *dev)
|
|
+{
|
|
+ return request_irq(
|
|
+ gpiod_to_irq(data_available),
|
|
+ data_available_interrupt_handler,
|
|
+ IRQF_TIMER | IRQF_TRIGGER_RISING,
|
|
+ "data_available_int",
|
|
+ NULL
|
|
+ );
|
|
+}
|
|
+
|
|
+static void pisnd_spi_gpio_irq_uninit(void)
|
|
+{
|
|
+ free_irq(gpiod_to_irq(data_available), NULL);
|
|
+}
|
|
+
|
|
+static int spi_read_info(void)
|
|
+{
|
|
+ uint16_t tmp;
|
|
+ uint8_t count;
|
|
+ uint8_t n;
|
|
+ uint8_t i;
|
|
+ uint8_t j;
|
|
+ char buffer[257];
|
|
+ int ret;
|
|
+ char *p;
|
|
+
|
|
+ memset(g_serial_num, 0, sizeof(g_serial_num));
|
|
+ memset(g_version, 0, sizeof(g_version));
|
|
+ memset(g_id, 0, sizeof(g_id));
|
|
+
|
|
+ tmp = spi_transfer16(0);
|
|
+
|
|
+ if (!(tmp >> 8))
|
|
+ return -EINVAL;
|
|
+
|
|
+ count = tmp & 0xff;
|
|
+
|
|
+ for (i = 0; i < count; ++i) {
|
|
+ memset(buffer, 0, sizeof(buffer));
|
|
+ ret = spi_read_bytes(buffer, sizeof(buffer)-1, &n);
|
|
+
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
+
|
|
+ switch (i) {
|
|
+ case 0:
|
|
+ if (n != 2)
|
|
+ return -EINVAL;
|
|
+
|
|
+ snprintf(
|
|
+ g_version,
|
|
+ sizeof(g_version),
|
|
+ "%x.%02x",
|
|
+ buffer[0],
|
|
+ buffer[1]
|
|
+ );
|
|
+ break;
|
|
+ case 1:
|
|
+ if (n >= sizeof(g_serial_num))
|
|
+ return -EINVAL;
|
|
+
|
|
+ memcpy(g_serial_num, buffer, sizeof(g_serial_num));
|
|
+ break;
|
|
+ case 2:
|
|
+ {
|
|
+ if (n >= sizeof(g_id))
|
|
+ return -EINVAL;
|
|
+
|
|
+ p = g_id;
|
|
+ for (j = 0; j < n; ++j)
|
|
+ p += sprintf(p, "%02x", buffer[j]);
|
|
+ }
|
|
+ break;
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int pisnd_spi_init(struct device *dev)
|
|
+{
|
|
+ int ret;
|
|
+ struct spi_device *spi;
|
|
+
|
|
+ memset(g_serial_num, 0, sizeof(g_serial_num));
|
|
+ memset(g_id, 0, sizeof(g_id));
|
|
+ memset(g_version, 0, sizeof(g_version));
|
|
+
|
|
+ spi = pisnd_spi_find_device();
|
|
+
|
|
+ if (spi != NULL) {
|
|
+ printd("initializing spi!\n");
|
|
+ pisnd_spi_device = spi;
|
|
+ ret = spi_setup(pisnd_spi_device);
|
|
+ } else {
|
|
+ printe("SPI device not found, deferring!\n");
|
|
+ return -EPROBE_DEFER;
|
|
+ }
|
|
+
|
|
+ ret = pisnd_spi_gpio_init(dev);
|
|
+
|
|
+ if (ret < 0) {
|
|
+ printe("SPI GPIO init failed: %d\n", ret);
|
|
+ spi_dev_put(pisnd_spi_device);
|
|
+ pisnd_spi_device = NULL;
|
|
+ pisnd_spi_gpio_uninit();
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ ret = spi_read_info();
|
|
+
|
|
+ if (ret < 0) {
|
|
+ printe("Reading card info failed: %d\n", ret);
|
|
+ spi_dev_put(pisnd_spi_device);
|
|
+ pisnd_spi_device = NULL;
|
|
+ pisnd_spi_gpio_uninit();
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ /* Flash the LEDs. */
|
|
+ spi_transfer16(0xf000);
|
|
+
|
|
+ ret = pisnd_spi_gpio_irq_init(dev);
|
|
+ if (ret < 0) {
|
|
+ printe("SPI irq request failed: %d\n", ret);
|
|
+ spi_dev_put(pisnd_spi_device);
|
|
+ pisnd_spi_device = NULL;
|
|
+ pisnd_spi_gpio_irq_uninit();
|
|
+ pisnd_spi_gpio_uninit();
|
|
+ }
|
|
+
|
|
+ ret = pisnd_init_workqueues();
|
|
+ if (ret != 0) {
|
|
+ printe("Workqueue initialization failed: %d\n", ret);
|
|
+ spi_dev_put(pisnd_spi_device);
|
|
+ pisnd_spi_device = NULL;
|
|
+ pisnd_spi_gpio_irq_uninit();
|
|
+ pisnd_spi_gpio_uninit();
|
|
+ pisnd_uninit_workqueues();
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ if (pisnd_spi_has_more()) {
|
|
+ printd("data is available, scheduling from init\n");
|
|
+ pisnd_schedule_process(TASK_PROCESS);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void pisnd_spi_uninit(void)
|
|
+{
|
|
+ pisnd_uninit_workqueues();
|
|
+
|
|
+ spi_dev_put(pisnd_spi_device);
|
|
+ pisnd_spi_device = NULL;
|
|
+
|
|
+ pisnd_spi_gpio_irq_uninit();
|
|
+ pisnd_spi_gpio_uninit();
|
|
+}
|
|
+
|
|
+static void pisnd_spi_send(uint8_t val)
|
|
+{
|
|
+ kfifo_put(&spi_fifo_out, val);
|
|
+ printd("schedule from spi_send\n");
|
|
+ pisnd_schedule_process(TASK_PROCESS);
|
|
+}
|
|
+
|
|
+static uint8_t pisnd_spi_recv(uint8_t *buffer, uint8_t length)
|
|
+{
|
|
+ return kfifo_out(&spi_fifo_in, buffer, length);
|
|
+}
|
|
+
|
|
+static void pisnd_spi_set_callback(pisnd_spi_recv_cb cb, void *data)
|
|
+{
|
|
+ g_recvData = data;
|
|
+ g_recvCallback = cb;
|
|
+}
|
|
+
|
|
+static const char *pisnd_spi_get_serial(void)
|
|
+{
|
|
+ if (strlen(g_serial_num))
|
|
+ return g_serial_num;
|
|
+
|
|
+ return "";
|
|
+}
|
|
+
|
|
+static const char *pisnd_spi_get_id(void)
|
|
+{
|
|
+ if (strlen(g_id))
|
|
+ return g_id;
|
|
+
|
|
+ return "";
|
|
+}
|
|
+
|
|
+static const char *pisnd_spi_get_version(void)
|
|
+{
|
|
+ if (strlen(g_version))
|
|
+ return g_version;
|
|
+
|
|
+ return "";
|
|
+}
|
|
+
|
|
+static const struct of_device_id pisound_of_match[] = {
|
|
+ { .compatible = "blokaslabs,pisound", },
|
|
+ { .compatible = "blokaslabs,pisound-spi", },
|
|
+ {},
|
|
+};
|
|
+
|
|
+static struct gpio_desc *osr0, *osr1, *osr2;
|
|
+static struct gpio_desc *reset;
|
|
+static struct gpio_desc *button;
|
|
+
|
|
+static int pisnd_hw_params(
|
|
+ struct snd_pcm_substream *substream,
|
|
+ struct snd_pcm_hw_params *params
|
|
+ )
|
|
+{
|
|
+ printd("rate = %d\n", params_rate(params));
|
|
+ printd("ch = %d\n", params_channels(params));
|
|
+ printd("bits = %u\n",
|
|
+ snd_pcm_format_physical_width(params_format(params)));
|
|
+ printd("format = %d\n", params_format(params));
|
|
+
|
|
+ gpiod_set_value(reset, false);
|
|
+
|
|
+ switch (params_rate(params)) {
|
|
+ case 48000:
|
|
+ gpiod_set_value(osr0, true);
|
|
+ gpiod_set_value(osr1, false);
|
|
+ gpiod_set_value(osr2, false);
|
|
+ break;
|
|
+ case 96000:
|
|
+ gpiod_set_value(osr0, true);
|
|
+ gpiod_set_value(osr1, true);
|
|
+ gpiod_set_value(osr2, false);
|
|
+ break;
|
|
+ case 192000:
|
|
+ gpiod_set_value(osr0, true);
|
|
+ gpiod_set_value(osr1, true);
|
|
+ gpiod_set_value(osr2, true);
|
|
+ break;
|
|
+ default:
|
|
+ printe("Unsupported rate %u!\n", params_rate(params));
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ gpiod_set_value(reset, true);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static unsigned int rates[3] = {
|
|
+ 48000, 96000, 192000
|
|
+};
|
|
+
|
|
+static struct snd_pcm_hw_constraint_list constraints_rates = {
|
|
+ .count = ARRAY_SIZE(rates),
|
|
+ .list = rates,
|
|
+ .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(
|
|
+ substream->runtime,
|
|
+ 0,
|
|
+ SNDRV_PCM_HW_PARAM_RATE,
|
|
+ &constraints_rates
|
|
+ );
|
|
+
|
|
+ if (err < 0)
|
|
+ return err;
|
|
+
|
|
+ err = snd_pcm_hw_constraint_list(
|
|
+ substream->runtime,
|
|
+ 0,
|
|
+ SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
|
|
+ &constraints_sample_bits
|
|
+ );
|
|
+
|
|
+ if (err < 0)
|
|
+ return err;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct snd_soc_ops pisnd_ops = {
|
|
+ .startup = pisnd_startup,
|
|
+ .hw_params = pisnd_hw_params,
|
|
+};
|
|
+
|
|
+static struct snd_soc_dai_link pisnd_dai[] = {
|
|
+ {
|
|
+ .name = "pisound",
|
|
+ .stream_name = "pisound",
|
|
+ .cpu_dai_name = "bcm2708-i2s.0",
|
|
+ .codec_dai_name = "snd-soc-dummy-dai",
|
|
+ .platform_name = "bcm2708-i2s.0",
|
|
+ .codec_name = "snd-soc-dummy",
|
|
+ .dai_fmt =
|
|
+ SND_SOC_DAIFMT_I2S |
|
|
+ SND_SOC_DAIFMT_NB_NF |
|
|
+ SND_SOC_DAIFMT_CBM_CFM,
|
|
+ .ops = &pisnd_ops,
|
|
+ },
|
|
+};
|
|
+
|
|
+static int pisnd_card_probe(struct snd_soc_card *card)
|
|
+{
|
|
+ int err = pisnd_midi_init(card->snd_card);
|
|
+
|
|
+ if (err < 0)
|
|
+ printe("pisnd_midi_init failed: %d\n", err);
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int pisnd_card_remove(struct snd_soc_card *card)
|
|
+{
|
|
+ pisnd_midi_uninit();
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct snd_soc_card pisnd_card = {
|
|
+ .name = "pisound",
|
|
+ .owner = THIS_MODULE,
|
|
+ .dai_link = pisnd_dai,
|
|
+ .num_links = ARRAY_SIZE(pisnd_dai),
|
|
+ .probe = pisnd_card_probe,
|
|
+ .remove = pisnd_card_remove,
|
|
+};
|
|
+
|
|
+static int pisnd_init_gpio(struct device *dev)
|
|
+{
|
|
+ osr0 = gpiod_get_index(dev, "osr", 0, GPIOD_ASIS);
|
|
+ osr1 = gpiod_get_index(dev, "osr", 1, GPIOD_ASIS);
|
|
+ osr2 = gpiod_get_index(dev, "osr", 2, GPIOD_ASIS);
|
|
+
|
|
+ reset = gpiod_get_index(dev, "reset", 0, GPIOD_ASIS);
|
|
+
|
|
+ button = gpiod_get_index(dev, "button", 0, GPIOD_ASIS);
|
|
+
|
|
+ gpiod_direction_output(osr0, 1);
|
|
+ gpiod_direction_output(osr1, 1);
|
|
+ gpiod_direction_output(osr2, 1);
|
|
+ gpiod_direction_output(reset, 1);
|
|
+
|
|
+ gpiod_set_value(reset, false);
|
|
+ gpiod_set_value(osr0, true);
|
|
+ gpiod_set_value(osr1, false);
|
|
+ gpiod_set_value(osr2, false);
|
|
+ gpiod_set_value(reset, true);
|
|
+
|
|
+ gpiod_export(button, false);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int pisnd_uninit_gpio(void)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ struct gpio_desc **gpios[] = {
|
|
+ &osr0, &osr1, &osr2, &reset, &button,
|
|
+ };
|
|
+
|
|
+ gpiod_unexport(button);
|
|
+
|
|
+ for (i = 0; i < ARRAY_SIZE(gpios); ++i) {
|
|
+ if (*gpios[i] == NULL) {
|
|
+ printd("weird, GPIO[%d] is NULL already\n", i);
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ gpiod_put(*gpios[i]);
|
|
+ *gpios[i] = NULL;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct kobject *pisnd_kobj;
|
|
+
|
|
+static ssize_t pisnd_serial_show(
|
|
+ struct kobject *kobj,
|
|
+ struct kobj_attribute *attr,
|
|
+ char *buf
|
|
+ )
|
|
+{
|
|
+ return sprintf(buf, "%s\n", pisnd_spi_get_serial());
|
|
+}
|
|
+
|
|
+static ssize_t pisnd_id_show(
|
|
+ struct kobject *kobj,
|
|
+ struct kobj_attribute *attr,
|
|
+ char *buf
|
|
+ )
|
|
+{
|
|
+ return sprintf(buf, "%s\n", pisnd_spi_get_id());
|
|
+}
|
|
+
|
|
+static ssize_t pisnd_version_show(
|
|
+ struct kobject *kobj,
|
|
+ struct kobj_attribute *attr,
|
|
+ char *buf
|
|
+ )
|
|
+{
|
|
+ return sprintf(buf, "%s\n", pisnd_spi_get_version());
|
|
+}
|
|
+
|
|
+static struct kobj_attribute pisnd_serial_attribute =
|
|
+ __ATTR(serial, 0644, pisnd_serial_show, NULL);
|
|
+static struct kobj_attribute pisnd_id_attribute =
|
|
+ __ATTR(id, 0644, pisnd_id_show, NULL);
|
|
+static struct kobj_attribute pisnd_version_attribute =
|
|
+ __ATTR(version, 0644, pisnd_version_show, NULL);
|
|
+
|
|
+static struct attribute *attrs[] = {
|
|
+ &pisnd_serial_attribute.attr,
|
|
+ &pisnd_id_attribute.attr,
|
|
+ &pisnd_version_attribute.attr,
|
|
+ NULL
|
|
+};
|
|
+
|
|
+static struct attribute_group attr_group = { .attrs = attrs };
|
|
+
|
|
+static int pisnd_probe(struct platform_device *pdev)
|
|
+{
|
|
+ int ret = 0;
|
|
+ int i;
|
|
+
|
|
+ ret = pisnd_spi_init(&pdev->dev);
|
|
+ if (ret < 0) {
|
|
+ printe("pisnd_spi_init failed: %d\n", ret);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ printi("Detected pisound card:\n");
|
|
+ printi("\tSerial: %s\n", pisnd_spi_get_serial());
|
|
+ printi("\tVersion: %s\n", pisnd_spi_get_version());
|
|
+ printi("\tId: %s\n", pisnd_spi_get_id());
|
|
+
|
|
+ pisnd_kobj = kobject_create_and_add("pisound", kernel_kobj);
|
|
+ if (!pisnd_kobj) {
|
|
+ pisnd_spi_uninit();
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ ret = sysfs_create_group(pisnd_kobj, &attr_group);
|
|
+ if (ret < 0) {
|
|
+ pisnd_spi_uninit();
|
|
+ kobject_put(pisnd_kobj);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ pisnd_init_gpio(&pdev->dev);
|
|
+ pisnd_card.dev = &pdev->dev;
|
|
+
|
|
+ if (pdev->dev.of_node) {
|
|
+ struct device_node *i2s_node;
|
|
+
|
|
+ i2s_node = of_parse_phandle(
|
|
+ pdev->dev.of_node,
|
|
+ "i2s-controller",
|
|
+ 0
|
|
+ );
|
|
+
|
|
+ for (i = 0; i < pisnd_card.num_links; ++i) {
|
|
+ struct snd_soc_dai_link *dai = &pisnd_dai[i];
|
|
+
|
|
+ if (i2s_node) {
|
|
+ dai->cpu_dai_name = NULL;
|
|
+ dai->cpu_of_node = i2s_node;
|
|
+ dai->platform_name = NULL;
|
|
+ dai->platform_of_node = i2s_node;
|
|
+ dai->stream_name = pisnd_spi_get_serial();
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ ret = snd_soc_register_card(&pisnd_card);
|
|
+
|
|
+ if (ret < 0) {
|
|
+ printe("snd_soc_register_card() failed: %d\n", ret);
|
|
+ pisnd_uninit_gpio();
|
|
+ kobject_put(pisnd_kobj);
|
|
+ pisnd_spi_uninit();
|
|
+ }
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int pisnd_remove(struct platform_device *pdev)
|
|
+{
|
|
+ printi("Unloading.\n");
|
|
+
|
|
+ if (pisnd_kobj) {
|
|
+ kobject_put(pisnd_kobj);
|
|
+ pisnd_kobj = NULL;
|
|
+ }
|
|
+
|
|
+ pisnd_spi_uninit();
|
|
+
|
|
+ /* Turn off */
|
|
+ gpiod_set_value(reset, false);
|
|
+ pisnd_uninit_gpio();
|
|
+
|
|
+ return snd_soc_unregister_card(&pisnd_card);
|
|
+}
|
|
+
|
|
+MODULE_DEVICE_TABLE(of, pisound_of_match);
|
|
+
|
|
+static struct platform_driver pisnd_driver = {
|
|
+ .driver = {
|
|
+ .name = "snd-rpi-pisound",
|
|
+ .owner = THIS_MODULE,
|
|
+ .of_match_table = pisound_of_match,
|
|
+ },
|
|
+ .probe = pisnd_probe,
|
|
+ .remove = pisnd_remove,
|
|
+};
|
|
+
|
|
+module_platform_driver(pisnd_driver);
|
|
+
|
|
+MODULE_AUTHOR("Giedrius Trainavicius <giedrius@blokas.io>");
|
|
+MODULE_DESCRIPTION("ASoC Driver for pisound, http://blokas.io/pisound");
|
|
+MODULE_LICENSE("GPL v2");
|