aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-4.14/950-0138-Updates-for-Pisound-module-code.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0138-Updates-for-Pisound-module-code.patch')
-rw-r--r--target/linux/brcm2708/patches-4.14/950-0138-Updates-for-Pisound-module-code.patch422
1 files changed, 0 insertions, 422 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0138-Updates-for-Pisound-module-code.patch b/target/linux/brcm2708/patches-4.14/950-0138-Updates-for-Pisound-module-code.patch
deleted file mode 100644
index af501d56f4..0000000000
--- a/target/linux/brcm2708/patches-4.14/950-0138-Updates-for-Pisound-module-code.patch
+++ /dev/null
@@ -1,422 +0,0 @@
-From 5f3557a2e88b324e026d44f8fb7eb3ea37bba16b Mon Sep 17 00:00:00 2001
-From: Giedrius Trainavicius <giedrius@blokas.io>
-Date: Tue, 25 Oct 2016 01:47:20 +0300
-Subject: [PATCH 138/454] Updates for Pisound module code:
-
- * Merged 'Fix a warning in DEBUG builds' (1c8b82b).
- * Updating some strings and copyright information.
- * Fix for handling high load of MIDI input and output.
- * Use dual rate oversampling ratio for 96kHz instead of single
- rate one.
-
-Signed-off-by: Giedrius Trainavicius <giedrius@blokas.io>
----
- .../arm/boot/dts/overlays/pisound-overlay.dts | 4 +-
- sound/soc/bcm/pisound.c | 209 ++++++++++++------
- 2 files changed, 146 insertions(+), 67 deletions(-)
-
---- a/arch/arm/boot/dts/overlays/pisound-overlay.dts
-+++ b/arch/arm/boot/dts/overlays/pisound-overlay.dts
-@@ -1,6 +1,6 @@
- /*
-- * pisound Linux kernel module.
-- * Copyright (C) 2016 Vilniaus Blokas UAB, http://blokas.io/pisound
-+ * Pisound Linux kernel module.
-+ * Copyright (C) 2016-2017 Vilniaus Blokas UAB, https://blokas.io/pisound
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
---- a/sound/soc/bcm/pisound.c
-+++ b/sound/soc/bcm/pisound.c
-@@ -1,6 +1,6 @@
- /*
-- * pisound Linux kernel module.
-- * Copyright (C) 2016 Vilniaus Blokas UAB, http://blokas.io/pisound
-+ * Pisound Linux kernel module.
-+ * Copyright (C) 2016-2017 Vilniaus Blokas UAB, https://blokas.io/pisound
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
-@@ -28,6 +28,7 @@
- #include <linux/spi/spi.h>
- #include <linux/interrupt.h>
- #include <linux/kfifo.h>
-+#include <linux/jiffies.h>
-
- #include <sound/core.h>
- #include <sound/pcm.h>
-@@ -41,7 +42,8 @@
- static int pisnd_spi_init(struct device *dev);
- static void pisnd_spi_uninit(void);
-
--static void pisnd_spi_send(uint8_t val);
-+static void pisnd_spi_flush(void);
-+static void pisnd_spi_start(void);
- static uint8_t pisnd_spi_recv(uint8_t *buffer, uint8_t length);
-
- typedef void (*pisnd_spi_recv_cb)(void *data);
-@@ -56,7 +58,7 @@ static void pisnd_midi_uninit(void);
-
- #define PISOUND_LOG_PREFIX "pisound: "
-
--#ifdef DEBUG
-+#ifdef PISOUND_DEBUG
- # define printd(...) pr_alert(PISOUND_LOG_PREFIX __VA_ARGS__)
- #else
- # define printd(...) do {} while (0)
-@@ -65,13 +67,18 @@ static void pisnd_midi_uninit(void);
- #define printe(...) pr_err(PISOUND_LOG_PREFIX __VA_ARGS__)
- #define printi(...) pr_info(PISOUND_LOG_PREFIX __VA_ARGS__)
-
-+static struct snd_rawmidi *g_rmidi;
-+static struct snd_rawmidi_substream *g_midi_output_substream;
-+
- static int pisnd_output_open(struct snd_rawmidi_substream *substream)
- {
-+ g_midi_output_substream = substream;
- return 0;
- }
-
- static int pisnd_output_close(struct snd_rawmidi_substream *substream)
- {
-+ g_midi_output_substream = NULL;
- return 0;
- }
-
-@@ -80,26 +87,20 @@ static void pisnd_output_trigger(
- int up
- )
- {
-- uint8_t data;
-+ if (substream != g_midi_output_substream) {
-+ printe("MIDI output trigger called for an unexpected stream!");
-+ return;
-+ }
-
- if (!up)
- return;
-
-- while (snd_rawmidi_transmit_peek(substream, &data, 1)) {
-- pisnd_spi_send(data);
-- snd_rawmidi_transmit_ack(substream, 1);
-- }
-+ pisnd_spi_start();
- }
-
- static void pisnd_output_drain(struct snd_rawmidi_substream *substream)
- {
-- uint8_t data;
--
-- while (snd_rawmidi_transmit_peek(substream, &data, 1)) {
-- pisnd_spi_send(data);
--
-- snd_rawmidi_transmit_ack(substream, 1);
-- }
-+ pisnd_spi_flush();
- }
-
- static int pisnd_input_open(struct snd_rawmidi_substream *substream)
-@@ -120,7 +121,7 @@ static void pisnd_midi_recv_callback(voi
- while ((n = pisnd_spi_recv(data, sizeof(data)))) {
- int res = snd_rawmidi_receive(substream, data, n);
- (void)res;
-- printd("midi recv 0x%02x, res = %d\n", data, res);
-+ printd("midi recv %u bytes, res = %d\n", n, res);
- }
- }
-
-@@ -134,8 +135,6 @@ static void pisnd_input_trigger(struct s
- }
- }
-
--static struct snd_rawmidi *g_rmidi;
--
- static struct snd_rawmidi_ops pisnd_output_ops = {
- .open = pisnd_output_open,
- .close = pisnd_output_close,
-@@ -168,7 +167,11 @@ static struct snd_rawmidi_global_ops pis
-
- static int pisnd_midi_init(struct snd_card *card)
- {
-- int err = snd_rawmidi_new(card, "pisound MIDI", 0, 1, 1, &g_rmidi);
-+ int err;
-+
-+ g_midi_output_substream = NULL;
-+
-+ err = snd_rawmidi_new(card, "pisound MIDI", 0, 1, 1, &g_rmidi);
-
- if (err < 0) {
- printe("snd_rawmidi_new failed: %d\n", err);
-@@ -209,7 +212,7 @@ static void pisnd_midi_uninit(void)
- static void *g_recvData;
- static pisnd_spi_recv_cb g_recvCallback;
-
--#define FIFO_SIZE 512
-+#define FIFO_SIZE 4096
-
- static char g_serial_num[11];
- static char g_id[25];
-@@ -231,6 +234,7 @@ static struct work_struct pisnd_work_pro
-
- static void pisnd_work_handler(struct work_struct *work);
-
-+static void spi_transfer(const uint8_t *txbuf, uint8_t *rxbuf, int len);
- static uint16_t spi_transfer16(uint16_t val);
-
- static int pisnd_init_workqueues(void)
-@@ -285,9 +289,6 @@ static unsigned long spilockflags;
-
- static uint16_t spi_transfer16(uint16_t val)
- {
-- int err;
-- struct spi_transfer transfer;
-- struct spi_message msg;
- uint8_t txbuf[2];
- uint8_t rxbuf[2];
-
-@@ -296,19 +297,38 @@ static uint16_t spi_transfer16(uint16_t
- return 0;
- }
-
-+ txbuf[0] = val >> 8;
-+ txbuf[1] = val & 0xff;
-+
-+ spi_transfer(txbuf, rxbuf, sizeof(txbuf));
-+
-+ printd("received: %02x%02x\n", rxbuf[0], rxbuf[1]);
-+
-+ return (rxbuf[0] << 8) | rxbuf[1];
-+}
-+
-+static void spi_transfer(const uint8_t *txbuf, uint8_t *rxbuf, int len)
-+{
-+ int err;
-+ struct spi_transfer transfer;
-+ struct spi_message msg;
-+
-+ memset(rxbuf, 0, sizeof(txbuf));
-+
-+ if (!pisnd_spi_device) {
-+ printe("pisnd_spi_device null, returning\n");
-+ return;
-+ }
-+
- spi_message_init(&msg);
-
- memset(&transfer, 0, sizeof(transfer));
-- memset(&rxbuf, 0, sizeof(rxbuf));
-
-- txbuf[0] = val >> 8;
-- txbuf[1] = val & 0xff;
--
-- transfer.tx_buf = &txbuf;
-- transfer.rx_buf = &rxbuf;
-- transfer.len = sizeof(txbuf);
-- transfer.speed_hz = 125000;
-- transfer.delay_usecs = 100;
-+ transfer.tx_buf = txbuf;
-+ transfer.rx_buf = rxbuf;
-+ transfer.len = len;
-+ transfer.speed_hz = 100000;
-+ transfer.delay_usecs = 10;
- spi_message_add_tail(&transfer, &msg);
-
- spin_lock_irqsave(&spilock, spilockflags);
-@@ -317,13 +337,10 @@ static uint16_t spi_transfer16(uint16_t
-
- if (err < 0) {
- printe("spi_sync error %d\n", err);
-- return 0;
-+ return;
- }
-
-- 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)
-@@ -335,7 +352,7 @@ static int spi_read_bytes(char *dst, siz
- memset(dst, 0, length);
- *bytesRead = 0;
-
-- rx = spi_transfer16(0);
-+ rx = spi_transfer16(0);
- if (!(rx >> 8))
- return -EINVAL;
-
-@@ -388,35 +405,90 @@ static struct spi_device *pisnd_spi_find
-
- static void pisnd_work_handler(struct work_struct *work)
- {
-- uint16_t rx;
-- uint16_t tx;
-+ enum { TRANSFER_SIZE = 4 };
-+ enum { PISOUND_OUTPUT_BUFFER_SIZE = 128 };
-+ enum { MIDI_BYTES_PER_SECOND = 3125 };
-+ int out_buffer_used = 0;
-+ unsigned long now;
- uint8_t val;
-+ uint8_t txbuf[TRANSFER_SIZE];
-+ uint8_t rxbuf[TRANSFER_SIZE];
-+ uint8_t midibuf[TRANSFER_SIZE];
-+ int i, n;
-+ bool had_data;
-+
-+ unsigned long last_transfer_at = jiffies;
-
- if (work == &pisnd_work_process) {
- if (pisnd_spi_device == NULL)
- return;
-
- do {
-- val = 0;
-- tx = 0;
-+ if (g_midi_output_substream &&
-+ kfifo_avail(&spi_fifo_out) >= sizeof(midibuf)) {
-
-- if (g_ledFlashDurationChanged) {
-- tx = 0xf000 | g_ledFlashDuration;
-- g_ledFlashDuration = 0;
-- g_ledFlashDurationChanged = false;
-- } else if (kfifo_get(&spi_fifo_out, &val)) {
-- tx = 0x0f00 | val;
-+ n = snd_rawmidi_transmit_peek(
-+ g_midi_output_substream,
-+ midibuf, sizeof(midibuf)
-+ );
-+
-+ if (n > 0) {
-+ for (i = 0; i < n; ++i)
-+ kfifo_put(
-+ &spi_fifo_out,
-+ midibuf[i]
-+ );
-+ snd_rawmidi_transmit_ack(
-+ g_midi_output_substream,
-+ i
-+ );
-+ }
- }
-
-- rx = spi_transfer16(tx);
-+ had_data = false;
-+ memset(txbuf, 0, sizeof(txbuf));
-+ for (i = 0; i < sizeof(txbuf) &&
-+ out_buffer_used < PISOUND_OUTPUT_BUFFER_SIZE;
-+ i += 2) {
-+
-+ val = 0;
-+
-+ if (g_ledFlashDurationChanged) {
-+ txbuf[i+0] = 0xf0;
-+ txbuf[i+1] = g_ledFlashDuration;
-+ g_ledFlashDuration = 0;
-+ g_ledFlashDurationChanged = false;
-+ } else if (kfifo_get(&spi_fifo_out, &val)) {
-+ txbuf[i+0] = 0x0f;
-+ txbuf[i+1] = val;
-+ ++out_buffer_used;
-+ }
-+ }
-
-- if (rx & 0xff00) {
-- kfifo_put(&spi_fifo_in, rx & 0xff);
-- if (kfifo_len(&spi_fifo_in) > 16
-- && g_recvCallback)
-- g_recvCallback(g_recvData);
-+ spi_transfer(txbuf, rxbuf, sizeof(txbuf));
-+ /* Estimate the Pisound's MIDI output buffer usage, so
-+ * that we don't overflow it. Space in the buffer should
-+ * be becoming available at the UART MIDI byte transfer
-+ * rate.
-+ */
-+ now = jiffies;
-+ out_buffer_used -=
-+ (MIDI_BYTES_PER_SECOND / HZ) /
-+ (now - last_transfer_at);
-+ if (out_buffer_used < 0)
-+ out_buffer_used = 0;
-+ last_transfer_at = now;
-+
-+ for (i = 0; i < sizeof(rxbuf); i += 2) {
-+ if (rxbuf[i]) {
-+ kfifo_put(&spi_fifo_in, rxbuf[i+1]);
-+ if (kfifo_len(&spi_fifo_in) > 16 &&
-+ g_recvCallback)
-+ g_recvCallback(g_recvData);
-+ had_data = true;
-+ }
- }
-- } while (rx != 0
-+ } while (had_data
- || !kfifo_is_empty(&spi_fifo_out)
- || pisnd_spi_has_more()
- || g_ledFlashDurationChanged
-@@ -492,7 +564,7 @@ static int spi_read_info(void)
- if (!(tmp >> 8))
- return -EINVAL;
-
-- count = tmp & 0xff;
-+ count = tmp & 0xff;
-
- for (i = 0; i < count; ++i) {
- memset(buffer, 0, sizeof(buffer));
-@@ -628,10 +700,17 @@ static void pisnd_spi_flash_leds(uint8_t
- pisnd_schedule_process(TASK_PROCESS);
- }
-
--static void pisnd_spi_send(uint8_t val)
-+static void pisnd_spi_flush(void)
-+{
-+ while (!kfifo_is_empty(&spi_fifo_out)) {
-+ pisnd_spi_start();
-+ flush_workqueue(pisnd_workqueue);
-+ }
-+}
-+
-+static void pisnd_spi_start(void)
- {
-- kfifo_put(&spi_fifo_out, val);
-- printd("schedule from spi_send\n");
-+ printd("schedule from spi_start\n");
- pisnd_schedule_process(TASK_PROCESS);
- }
-
-@@ -765,7 +844,7 @@ static int pisnd_hw_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,
-+ /* 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);
-@@ -786,8 +865,8 @@ static int pisnd_hw_params(
- break;
- case 96000:
- gpiod_set_value(osr0, true);
-- gpiod_set_value(osr1, true);
-- gpiod_set_value(osr2, false);
-+ gpiod_set_value(osr1, false);
-+ gpiod_set_value(osr2, true);
- break;
- case 192000:
- gpiod_set_value(osr0, true);
-@@ -1030,7 +1109,7 @@ static int pisnd_probe(struct platform_d
- return ret;
- }
-
-- printi("Detected pisound card:\n");
-+ 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());
-@@ -1119,5 +1198,5 @@ static struct platform_driver pisnd_driv
- module_platform_driver(pisnd_driver);
-
- MODULE_AUTHOR("Giedrius Trainavicius <giedrius@blokas.io>");
--MODULE_DESCRIPTION("ASoC Driver for pisound, http://blokas.io/pisound");
-+MODULE_DESCRIPTION("ASoC Driver for Pisound, https://blokas.io/pisound");
- MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-20 09:31:41 +0000