From 605fa7d4def2e11b8090d0f8e0a14354e8389f99 Mon Sep 17 00:00:00 2001
From: jakemsr <jakemsr@openbsd.org>
Date: Wed, 21 Jul 2010 10:16:07 +0000
Subject: [PATCH] add a couple quirks for the E-MU 0202 * the clock rate is
 configured through the audio interface, instead of on the endpoint. * since
 the clock rate is set on the interface, both play and record must use the
 same sample rate.  this means the playback and recording parameters are not
 independent, which is what uaudio assumes.

---
 sys/dev/usb/uaudio.c | 43 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/sys/dev/usb/uaudio.c b/sys/dev/usb/uaudio.c
index 5e2ba965f3d..ea535f47ed4 100644
--- a/sys/dev/usb/uaudio.c
+++ b/sys/dev/usb/uaudio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uaudio.c,v 1.82 2010/07/21 05:57:19 jakemsr Exp $ */
+/*	$OpenBSD: uaudio.c,v 1.83 2010/07/21 10:16:07 jakemsr Exp $ */
 /*	$NetBSD: uaudio.c,v 1.90 2004/10/29 17:12:53 kent Exp $	*/
 
 /*
@@ -163,6 +163,8 @@ struct chan {
 #define UAUDIO_FLAG_NO_XU	 0x0004	/* has broken extension unit */
 #define UAUDIO_FLAG_BAD_ADC	 0x0008	/* bad audio spec version number */
 #define UAUDIO_FLAG_VENDOR_CLASS 0x0010	/* claims vendor class but works */
+#define UAUDIO_FLAG_DEPENDENT	 0x0020	/* play and record params must equal */
+#define UAUDIO_FLAG_EMU0202	 0x0040
 
 struct uaudio_devs {
 	struct usb_devno	 uv_dev;
@@ -173,7 +175,8 @@ struct uaudio_devs {
 	{ { USB_VENDOR_ALTEC, USB_PRODUCT_ALTEC_ASC495 },
 		UAUDIO_FLAG_BAD_AUDIO },
 	{ { USB_VENDOR_CREATIVE, USB_PRODUCT_CREATIVE_EMU0202 },
-		UAUDIO_FLAG_VENDOR_CLASS },
+		UAUDIO_FLAG_VENDOR_CLASS | UAUDIO_FLAG_EMU0202 |
+		UAUDIO_FLAG_DEPENDENT },
 	{ { USB_VENDOR_DALLAS, USB_PRODUCT_DALLAS_J6502 },
 		UAUDIO_FLAG_NO_XU | UAUDIO_FLAG_BAD_ADC },
 	{ { USB_VENDOR_LOGITECH, USB_PRODUCT_LOGITECH_QUICKCAMNBDLX },
@@ -317,6 +320,7 @@ void	uaudio_ctl_set
 	(struct uaudio_softc *, int, struct mixerctl *, int, int);
 
 usbd_status uaudio_set_speed(struct uaudio_softc *, int, u_int);
+void	uaudio_set_speed_emu0202(struct chan *ch);
 
 usbd_status uaudio_chan_open(struct uaudio_softc *, struct chan *);
 void	uaudio_chan_close(struct uaudio_softc *, struct chan *);
@@ -2293,9 +2297,11 @@ int
 uaudio_get_props(void *addr)
 {
 	struct uaudio_softc *sc = addr;
-	int props;
+	int props = 0;
+
+	if (!(sc->sc_quirks & UAUDIO_FLAG_DEPENDENT))
+		props |= AUDIO_PROP_INDEPENDENT;
 
-	props = AUDIO_PROP_INDEPENDENT;
 	if ((sc->sc_mode & (AUMODE_PLAY | AUMODE_RECORD)) ==
 	    (AUMODE_PLAY | AUMODE_RECORD))
 		props |= AUDIO_PROP_FULLDUPLEX;
@@ -2707,6 +2713,9 @@ uaudio_chan_open(struct uaudio_softc *sc, struct chan *ch)
 				 usbd_errstr(err)));
 	}
 
+	if (sc->sc_quirks & UAUDIO_FLAG_EMU0202)
+		uaudio_set_speed_emu0202(ch);
+
 	ch->pipe = 0;
 	ch->sync_pipe = 0;
 	DPRINTF(("uaudio_chan_open: create pipe to 0x%02x\n", endpt));
@@ -3373,3 +3382,29 @@ uaudio_set_speed(struct uaudio_softc *sc, int endpt, u_int speed)
 
 	return (usbd_do_request(sc->sc_udev, &req, data));
 }
+
+void
+uaudio_set_speed_emu0202(struct chan *ch)
+{
+	usb_device_request_t req;
+	int rates[6] = { 44100, 48000, 88200, 96000, 176400, 192000 };
+	int i;
+	u_int8_t data[1];
+
+	for (i = 0; i < 6; i++)
+		if (rates[i] >= ch->sample_rate)
+			break;
+	if (i >= 6) {
+		DPRINTF(("%s: unhandled rate %d\n", __func__, ch->sample_rate));
+		i = 0;
+	}
+
+	req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
+	req.bRequest = SET_CUR;
+	USETW2(req.wValue, 0x03, 0);
+	USETW2(req.wIndex, 12, ch->sc->sc_ac_iface);
+	USETW(req.wLength, 1);
+	data[0] = i;
+
+	usbd_do_request(ch->sc->sc_udev, &req, data);
+}
-- 
2.20.1