From 61864d844c296933d40c02683252bbea5193b101 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 12 Jan 2015 22:29:57 +0100 Subject: ALSA: move line6 usb driver into sound/usb Promote line6 driver from staging to sound/usb/line6 directory, and maintain through sound subsystem tree. This commit just moves the code and adapts Makefile / Kconfig. The further renames and misc cleanups will follow. Signed-off-by: Takashi Iwai --- sound/usb/line6/variax.c | 239 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 sound/usb/line6/variax.c (limited to 'sound/usb/line6/variax.c') diff --git a/sound/usb/line6/variax.c b/sound/usb/line6/variax.c new file mode 100644 index 000000000000..b4a41b0ad0ea --- /dev/null +++ b/sound/usb/line6/variax.c @@ -0,0 +1,239 @@ +/* + * Line6 Linux USB driver - 0.9.1beta + * + * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2. + * + */ + +#include + +#include "audio.h" +#include "driver.h" +#include "variax.h" + +#define VARIAX_OFFSET_ACTIVATE 7 + +/* + This message is sent by the device during initialization and identifies + the connected guitar version. +*/ +static const char variax_init_version[] = { + 0xf0, 0x7e, 0x7f, 0x06, 0x02, 0x00, 0x01, 0x0c, + 0x07, 0x00, 0x00, 0x00 +}; + +/* + This message is the last one sent by the device during initialization. +*/ +static const char variax_init_done[] = { + 0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x6b +}; + +static const char variax_activate[] = { + 0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x2a, 0x01, + 0xf7 +}; + +/* forward declarations: */ +static void variax_startup2(unsigned long data); +static void variax_startup4(unsigned long data); +static void variax_startup5(unsigned long data); + +static void variax_activate_async(struct usb_line6_variax *variax, int a) +{ + variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = a; + line6_send_raw_message_async(&variax->line6, variax->buffer_activate, + sizeof(variax_activate)); +} + +/* + Variax startup procedure. + This is a sequence of functions with special requirements (e.g., must + not run immediately after initialization, must not run in interrupt + context). After the last one has finished, the device is ready to use. +*/ + +static void variax_startup1(struct usb_line6_variax *variax) +{ + CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_INIT); + + /* delay startup procedure: */ + line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1, + variax_startup2, (unsigned long)variax); +} + +static void variax_startup2(unsigned long data) +{ + struct usb_line6_variax *variax = (struct usb_line6_variax *)data; + struct usb_line6 *line6 = &variax->line6; + + /* schedule another startup procedure until startup is complete: */ + if (variax->startup_progress >= VARIAX_STARTUP_LAST) + return; + + variax->startup_progress = VARIAX_STARTUP_VERSIONREQ; + line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1, + variax_startup2, (unsigned long)variax); + + /* request firmware version: */ + line6_version_request_async(line6); +} + +static void variax_startup3(struct usb_line6_variax *variax) +{ + CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_WAIT); + + /* delay startup procedure: */ + line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY3, + variax_startup4, (unsigned long)variax); +} + +static void variax_startup4(unsigned long data) +{ + struct usb_line6_variax *variax = (struct usb_line6_variax *)data; + + CHECK_STARTUP_PROGRESS(variax->startup_progress, + VARIAX_STARTUP_ACTIVATE); + + /* activate device: */ + variax_activate_async(variax, 1); + line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY4, + variax_startup5, (unsigned long)variax); +} + +static void variax_startup5(unsigned long data) +{ + struct usb_line6_variax *variax = (struct usb_line6_variax *)data; + + CHECK_STARTUP_PROGRESS(variax->startup_progress, + VARIAX_STARTUP_WORKQUEUE); + + /* schedule work for global work queue: */ + schedule_work(&variax->startup_work); +} + +static void variax_startup6(struct work_struct *work) +{ + struct usb_line6_variax *variax = + container_of(work, struct usb_line6_variax, startup_work); + + CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_SETUP); + + /* ALSA audio interface: */ + line6_register_audio(&variax->line6); +} + +/* + Process a completely received message. +*/ +static void line6_variax_process_message(struct usb_line6 *line6) +{ + struct usb_line6_variax *variax = (struct usb_line6_variax *) line6; + const unsigned char *buf = variax->line6.buffer_message; + + switch (buf[0]) { + case LINE6_RESET: + dev_info(variax->line6.ifcdev, "VARIAX reset\n"); + break; + + case LINE6_SYSEX_BEGIN: + if (memcmp(buf + 1, variax_init_version + 1, + sizeof(variax_init_version) - 1) == 0) { + variax_startup3(variax); + } else if (memcmp(buf + 1, variax_init_done + 1, + sizeof(variax_init_done) - 1) == 0) { + /* notify of complete initialization: */ + variax_startup4((unsigned long)variax); + } + break; + } +} + +/* + Variax destructor. +*/ +static void variax_destruct(struct usb_interface *interface) +{ + struct usb_line6_variax *variax = usb_get_intfdata(interface); + + if (variax == NULL) + return; + line6_cleanup_audio(&variax->line6); + + del_timer(&variax->startup_timer1); + del_timer(&variax->startup_timer2); + cancel_work_sync(&variax->startup_work); + + kfree(variax->buffer_activate); +} + +/* + Workbench device disconnected. +*/ +static void line6_variax_disconnect(struct usb_interface *interface) +{ + if (interface == NULL) + return; + + variax_destruct(interface); +} + +/* + Try to init workbench device. +*/ +static int variax_try_init(struct usb_interface *interface, + struct usb_line6 *line6) +{ + struct usb_line6_variax *variax = (struct usb_line6_variax *) line6; + int err; + + line6->process_message = line6_variax_process_message; + line6->disconnect = line6_variax_disconnect; + + init_timer(&variax->startup_timer1); + init_timer(&variax->startup_timer2); + INIT_WORK(&variax->startup_work, variax_startup6); + + if ((interface == NULL) || (variax == NULL)) + return -ENODEV; + + /* initialize USB buffers: */ + variax->buffer_activate = kmemdup(variax_activate, + sizeof(variax_activate), GFP_KERNEL); + + if (variax->buffer_activate == NULL) { + dev_err(&interface->dev, "Out of memory\n"); + return -ENOMEM; + } + + /* initialize audio system: */ + err = line6_init_audio(&variax->line6); + if (err < 0) + return err; + + /* initialize MIDI subsystem: */ + err = line6_init_midi(&variax->line6); + if (err < 0) + return err; + + /* initiate startup procedure: */ + variax_startup1(variax); + return 0; +} + +/* + Init workbench device (and clean up in case of failure). +*/ +int line6_variax_init(struct usb_interface *interface, struct usb_line6 *line6) +{ + int err = variax_try_init(interface, line6); + + if (err < 0) + variax_destruct(interface); + + return err; +} -- cgit v1.2.3