Variax driver had a very complex and staged startup sequence using multiple timers and a work. This patch simplifies the procedure to a single delayed work.
Now the startup stage consists of: - VARIAX_STARTUP_VERSIONREQ: requesting the version and the message handler raises up to the next stage upon receiving the reply. The request is repeated until a reply arrives. - VARIAX_STARTUP_ACTIVATE: does activation, and queue for the next stage. - VARIAX_STARTUP_SETUP: registers the card.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/usb/line6/variax.c | 128 +++++++++++++---------------------------------- 1 file changed, 35 insertions(+), 93 deletions(-)
diff --git a/sound/usb/line6/variax.c b/sound/usb/line6/variax.c index e8c852b2ce35..fb114156b7ca 100644 --- a/sound/usb/line6/variax.c +++ b/sound/usb/line6/variax.c @@ -26,13 +26,9 @@ Stages of Variax startup procedure */ enum { - VARIAX_STARTUP_INIT = 1, VARIAX_STARTUP_VERSIONREQ, - VARIAX_STARTUP_WAIT, VARIAX_STARTUP_ACTIVATE, - VARIAX_STARTUP_WORKQUEUE, VARIAX_STARTUP_SETUP, - VARIAX_STARTUP_LAST = VARIAX_STARTUP_SETUP - 1 };
enum { @@ -47,13 +43,6 @@ struct usb_line6_variax { /* Buffer for activation code */ unsigned char *buffer_activate;
- /* Handler for device initialization */ - struct work_struct startup_work; - - /* Timers for device initialization */ - struct timer_list startup_timer1; - struct timer_list startup_timer2; - /* Current progress in startup procedure */ int startup_progress; }; @@ -81,11 +70,6 @@ static const char variax_activate[] = { 0xf7 };
-/* forward declarations: */ -static void variax_startup2(struct timer_list *t); -static void variax_startup4(struct timer_list *t); -static void variax_startup5(struct timer_list *t); - static void variax_activate_async(struct usb_line6_variax *variax, int a) { variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = a; @@ -100,74 +84,30 @@ static void variax_activate_async(struct usb_line6_variax *variax, int a) 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); -} - -static void variax_startup2(struct timer_list *t) -{ - struct usb_line6_variax *variax = from_timer(variax, t, startup_timer1); - 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); - - /* request firmware version: */ - line6_version_request_async(line6); -} - -static void variax_startup3(struct usb_line6_variax *variax) +static void variax_startup(struct usb_line6 *line6) { - CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_WAIT); - - /* delay startup procedure: */ - line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY3, - variax_startup4); -} - -static void variax_startup4(struct timer_list *t) -{ - struct usb_line6_variax *variax = from_timer(variax, t, startup_timer2); - - 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); -} - -static void variax_startup5(struct timer_list *t) -{ - struct usb_line6_variax *variax = from_timer(variax, t, startup_timer2); - - 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); + struct usb_line6_variax *variax = (struct usb_line6_variax *)line6;
- /* ALSA audio interface: */ - snd_card_register(variax->line6.card); + switch (variax->startup_progress) { + case VARIAX_STARTUP_VERSIONREQ: + /* repeat request until getting the response */ + schedule_delayed_work(&line6->startup_work, + msecs_to_jiffies(VARIAX_STARTUP_DELAY1)); + /* request firmware version: */ + line6_version_request_async(line6); + break; + case VARIAX_STARTUP_ACTIVATE: + /* activate device: */ + variax_activate_async(variax, 1); + variax->startup_progress = VARIAX_STARTUP_SETUP; + schedule_delayed_work(&line6->startup_work, + msecs_to_jiffies(VARIAX_STARTUP_DELAY4)); + break; + case VARIAX_STARTUP_SETUP: + /* ALSA audio interface: */ + snd_card_register(variax->line6.card); + break; + } }
/* @@ -186,11 +126,19 @@ static void line6_variax_process_message(struct usb_line6 *line6) case LINE6_SYSEX_BEGIN: if (memcmp(buf + 1, variax_init_version + 1, sizeof(variax_init_version) - 1) == 0) { - variax_startup3(variax); + if (variax->startup_progress >= VARIAX_STARTUP_ACTIVATE) + break; + variax->startup_progress = VARIAX_STARTUP_ACTIVATE; + cancel_delayed_work(&line6->startup_work); + schedule_delayed_work(&line6->startup_work, + msecs_to_jiffies(VARIAX_STARTUP_DELAY3)); } else if (memcmp(buf + 1, variax_init_done + 1, sizeof(variax_init_done) - 1) == 0) { /* notify of complete initialization: */ - variax_startup4(&variax->startup_timer2); + if (variax->startup_progress >= VARIAX_STARTUP_SETUP) + break; + cancel_delayed_work(&line6->startup_work); + schedule_delayed_work(&line6->startup_work, 0); } break; } @@ -203,10 +151,6 @@ static void line6_variax_disconnect(struct usb_line6 *line6) { struct usb_line6_variax *variax = (struct usb_line6_variax *)line6;
- del_timer(&variax->startup_timer1); - del_timer(&variax->startup_timer2); - cancel_work_sync(&variax->startup_work); - kfree(variax->buffer_activate); }
@@ -221,10 +165,7 @@ static int variax_init(struct usb_line6 *line6,
line6->process_message = line6_variax_process_message; line6->disconnect = line6_variax_disconnect; - - timer_setup(&variax->startup_timer1, NULL, 0); - timer_setup(&variax->startup_timer2, NULL, 0); - INIT_WORK(&variax->startup_work, variax_startup6); + line6->startup = variax_startup;
/* initialize USB buffers: */ variax->buffer_activate = kmemdup(variax_activate, @@ -239,7 +180,8 @@ static int variax_init(struct usb_line6 *line6, return err;
/* initiate startup procedure: */ - variax_startup1(variax); + schedule_delayed_work(&line6->startup_work, + msecs_to_jiffies(VARIAX_STARTUP_DELAY1)); return 0; }