X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=sound%2Fusb%2Fusbmidi.c;h=f1a2e2c2e02fa8c1b679695fb20d4d5e892c936b;hb=8caf89157d64f1eedba37113afb4b303b2b3e301;hp=5778a9b725ec1eebbd03d1763861262500bf7315;hpb=de745fb27983770ebfdeaa70f8a36f791fb33786;p=powerpc.git diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c index 5778a9b725..f1a2e2c2e0 100644 --- a/sound/usb/usbmidi.c +++ b/sound/usb/usbmidi.c @@ -44,6 +44,7 @@ #include #include #include +#include #include #include #include @@ -56,6 +57,12 @@ */ /* #define DUMP_PACKETS */ +/* + * how long to wait after some USB errors, so that khubd can disconnect() us + * without too many spurious errors + */ +#define ERROR_DELAY_JIFFIES (HZ / 10) + MODULE_AUTHOR("Clemens Ladisch "); MODULE_DESCRIPTION("USB Audio/MIDI helper module"); @@ -100,6 +107,7 @@ struct snd_usb_midi { snd_rawmidi_t* rmidi; struct usb_protocol_ops* usb_protocol_ops; struct list_head list; + struct timer_list error_timer; struct snd_usb_midi_endpoint { snd_usb_midi_out_endpoint_t *out; @@ -141,7 +149,8 @@ struct snd_usb_midi_in_endpoint { struct usbmidi_in_port { snd_rawmidi_substream_t* substream; } ports[0x10]; - int seen_f5; + u8 seen_f5; + u8 error_resubmit; int current_port; }; @@ -154,7 +163,7 @@ static const uint8_t snd_usbmidi_cin_length[] = { /* * Submits the URB, with error handling. */ -static int snd_usbmidi_submit_urb(struct urb* urb, int flags) +static int snd_usbmidi_submit_urb(struct urb* urb, gfp_t flags) { int err = usb_submit_urb(urb, flags); if (err < 0 && err != -ENODEV) @@ -167,14 +176,22 @@ static int snd_usbmidi_submit_urb(struct urb* urb, int flags) */ static int snd_usbmidi_urb_error(int status) { - if (status == -ENOENT) - return status; /* killed */ - if (status == -EILSEQ || - status == -ECONNRESET || - status == -ETIMEDOUT) - return -ENODEV; /* device removed/shutdown */ - snd_printk(KERN_ERR "urb status %d\n", status); - return 0; /* continue */ + switch (status) { + /* manually unlinked, or device gone */ + case -ENOENT: + case -ECONNRESET: + case -ESHUTDOWN: + case -ENODEV: + return -ENODEV; + /* errors that might occur during unplugging */ + case -EPROTO: /* EHCI */ + case -ETIMEDOUT: /* OHCI */ + case -EILSEQ: /* UHCI */ + return -EIO; + default: + snd_printk(KERN_ERR "urb status %d\n", status); + return 0; /* continue */ + } } /* @@ -218,8 +235,15 @@ static void snd_usbmidi_in_urb_complete(struct urb* urb, struct pt_regs *regs) ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer, urb->actual_length); } else { - if (snd_usbmidi_urb_error(urb->status) < 0) + int err = snd_usbmidi_urb_error(urb->status); + if (err < 0) { + if (err != -ENODEV) { + ep->error_resubmit = 1; + mod_timer(&ep->umidi->error_timer, + jiffies + ERROR_DELAY_JIFFIES); + } return; + } } if (usb_pipe_needs_resubmit(urb->pipe)) { @@ -236,8 +260,13 @@ static void snd_usbmidi_out_urb_complete(struct urb* urb, struct pt_regs *regs) ep->urb_active = 0; spin_unlock(&ep->buffer_lock); if (urb->status < 0) { - if (snd_usbmidi_urb_error(urb->status) < 0) + int err = snd_usbmidi_urb_error(urb->status); + if (err < 0) { + if (err != -ENODEV) + mod_timer(&ep->umidi->error_timer, + jiffies + ERROR_DELAY_JIFFIES); return; + } } snd_usbmidi_do_output(ep); } @@ -276,6 +305,24 @@ static void snd_usbmidi_out_tasklet(unsigned long data) snd_usbmidi_do_output(ep); } +/* called after transfers had been interrupted due to some USB error */ +static void snd_usbmidi_error_timer(unsigned long data) +{ + snd_usb_midi_t *umidi = (snd_usb_midi_t *)data; + int i; + + for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { + snd_usb_midi_in_endpoint_t *in = umidi->endpoints[i].in; + if (in && in->error_resubmit) { + in->error_resubmit = 0; + in->urb->dev = umidi->chip->dev; + snd_usbmidi_submit_urb(in->urb, GFP_ATOMIC); + } + if (umidi->endpoints[i].out) + snd_usbmidi_do_output(umidi->endpoints[i].out); + } +} + /* helper function to send static data that may not DMA-able */ static int send_bulk_static_data(snd_usb_midi_out_endpoint_t* ep, const void *data, int len) @@ -594,17 +641,20 @@ static void snd_usbmidi_emagic_finish_out(snd_usb_midi_out_endpoint_t* ep) static void snd_usbmidi_emagic_input(snd_usb_midi_in_endpoint_t* ep, uint8_t* buffer, int buffer_length) { - /* ignore padding bytes at end of buffer */ - while (buffer_length > 0 && buffer[buffer_length - 1] == 0xff) - --buffer_length; + int i; + + /* FF indicates end of valid data */ + for (i = 0; i < buffer_length; ++i) + if (buffer[i] == 0xff) { + buffer_length = i; + break; + } /* handle F5 at end of last buffer */ if (ep->seen_f5) goto switch_port; while (buffer_length > 0) { - int i; - /* determine size of data until next F5 */ for (i = 0; i < buffer_length; ++i) if (buffer[i] == 0xf5) @@ -671,6 +721,10 @@ static void snd_usbmidi_emagic_output(snd_usb_midi_out_endpoint_t* ep) break; } } + if (buf_free < ep->max_transfer && buf_free > 0) { + *buf = 0xff; + --buf_free; + } ep->urb->transfer_buffer_length = ep->max_transfer - buf_free; } @@ -765,7 +819,10 @@ static snd_rawmidi_ops_t snd_usbmidi_input_ops = { static void snd_usbmidi_in_endpoint_delete(snd_usb_midi_in_endpoint_t* ep) { if (ep->urb) { - kfree(ep->urb->transfer_buffer); + usb_buffer_free(ep->umidi->chip->dev, + ep->urb->transfer_buffer_length, + ep->urb->transfer_buffer, + ep->urb->transfer_dma); usb_free_urb(ep->urb); } kfree(ep); @@ -784,7 +841,7 @@ static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi, int length; rep->in = NULL; - ep = kcalloc(1, sizeof(*ep), GFP_KERNEL); + ep = kzalloc(sizeof(*ep), GFP_KERNEL); if (!ep) return -ENOMEM; ep->umidi = umidi; @@ -799,7 +856,8 @@ static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi, else pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep); length = usb_maxpacket(umidi->chip->dev, pipe, 0); - buffer = kmalloc(length, GFP_KERNEL); + buffer = usb_buffer_alloc(umidi->chip->dev, length, GFP_KERNEL, + &ep->urb->transfer_dma); if (!buffer) { snd_usbmidi_in_endpoint_delete(ep); return -ENOMEM; @@ -812,6 +870,7 @@ static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi, usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, length, snd_usb_complete_callback(snd_usbmidi_in_urb_complete), ep); + ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; rep->in = ep; return 0; @@ -832,10 +891,10 @@ static unsigned int snd_usbmidi_count_bits(unsigned int x) */ static void snd_usbmidi_out_endpoint_delete(snd_usb_midi_out_endpoint_t* ep) { - if (ep->tasklet.func) - tasklet_kill(&ep->tasklet); if (ep->urb) { - kfree(ep->urb->transfer_buffer); + usb_buffer_free(ep->umidi->chip->dev, ep->max_transfer, + ep->urb->transfer_buffer, + ep->urb->transfer_dma); usb_free_urb(ep->urb); } kfree(ep); @@ -854,7 +913,7 @@ static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi, void* buffer; rep->out = NULL; - ep = kcalloc(1, sizeof(*ep), GFP_KERNEL); + ep = kzalloc(sizeof(*ep), GFP_KERNEL); if (!ep) return -ENOMEM; ep->umidi = umidi; @@ -867,7 +926,8 @@ static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi, /* we never use interrupt output pipes */ pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep); ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1); - buffer = kmalloc(ep->max_transfer, GFP_KERNEL); + buffer = usb_buffer_alloc(umidi->chip->dev, ep->max_transfer, + GFP_KERNEL, &ep->urb->transfer_dma); if (!buffer) { snd_usbmidi_out_endpoint_delete(ep); return -ENOMEM; @@ -875,6 +935,7 @@ static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi, usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, ep->max_transfer, snd_usb_complete_callback(snd_usbmidi_out_urb_complete), ep); + ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; spin_lock_init(&ep->buffer_lock); tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep); @@ -918,8 +979,11 @@ void snd_usbmidi_disconnect(struct list_head* p) int i; umidi = list_entry(p, snd_usb_midi_t, list); + del_timer_sync(&umidi->error_timer); for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i]; + if (ep->out) + tasklet_kill(&ep->out->tasklet); if (ep->out && ep->out->urb) { usb_kill_urb(ep->out->urb); if (umidi->usb_protocol_ops->finish_out_endpoint) @@ -1473,13 +1537,16 @@ int snd_usb_create_midi_interface(snd_usb_audio_t* chip, int out_ports, in_ports; int i, err; - umidi = kcalloc(1, sizeof(*umidi), GFP_KERNEL); + umidi = kzalloc(sizeof(*umidi), GFP_KERNEL); if (!umidi) return -ENOMEM; umidi->chip = chip; umidi->iface = iface; umidi->quirk = quirk; umidi->usb_protocol_ops = &snd_usbmidi_standard_ops; + init_timer(&umidi->error_timer); + umidi->error_timer.function = snd_usbmidi_error_timer; + umidi->error_timer.data = (unsigned long)umidi; /* detect the endpoint(s) to use */ memset(endpoints, 0, sizeof(endpoints));