Index: sys/dev/ic/attimer.c
===================================================================
RCS file: /home/repos/netbsd-current/src/sys/dev/ic/attimer.c,v
retrieving revision 1.9
diff -u -r1.9 attimer.c
--- sys/dev/ic/attimer.c 12 Jun 2008 22:30:30 -0000 1.9
+++ sys/dev/ic/attimer.c 9 Jan 2009 01:02:40 -0000
@@ -112,3 +112,19 @@
TIMER_DIV(pitch) / 256);
splx(s);
}
+
+void
+attimer_set_pulse(device_t dev, int lowcnt)
+{
+ struct attimer_softc *sc = device_private(dev);
+ int s;
+
+ s = splhigh();
+ bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE,
+ TIMER_SEL2 | TIMER_16BIT | TIMER_INTTC);
+ bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
+ TIMER_DIV(lowcnt) % 256);
+ bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
+ TIMER_DIV(lowcnt) / 256);
+ splx(s);
+}
Index: sys/dev/ic/attimervar.h
===================================================================
RCS file: /home/repos/netbsd-current/src/sys/dev/ic/attimervar.h,v
retrieving revision 1.6
diff -u -r1.6 attimervar.h
--- sys/dev/ic/attimervar.h 29 Apr 2008 06:53:02 -0000 1.6
+++ sys/dev/ic/attimervar.h 9 Jan 2009 16:14:11 -0000
@@ -40,3 +40,4 @@
int attimer_detach(device_t, int);
device_t attimer_attach_speaker(void);
void attimer_set_pitch(device_t, int);
+void attimer_set_pulse(device_t, int);
Index: sys/arch/i386/conf/GENERIC
===================================================================
RCS file: /home/repos/netbsd-current/src/sys/arch/i386/conf/GENERIC,v
retrieving revision 1.922
diff -u -r1.922 GENERIC
--- sys/arch/i386/conf/GENERIC 28 Dec 2008 15:18:21 -0000 1.922
+++ sys/arch/i386/conf/GENERIC 16 Jan 2009 23:36:27 -0000
@@ -1317,7 +1317,8 @@
# The spkr driver provides a simple tone interface to the built in speaker.
#spkr0 at pcppi? # PC speaker
-
+# (EXPERIMENTAL) PC speaker driven by PCM. Exclusive to spkr0 (above)
+#audio* at pcppi? #with pwmaudio?
# FM-Radio devices
# ISA radio devices
Index: sys/arch/x86/isa/clock.c
===================================================================
RCS file: /home/repos/netbsd-current/src/sys/arch/x86/isa/clock.c,v
retrieving revision 1.31
diff -u -r1.31 clock.c
--- sys/arch/x86/isa/clock.c 16 Dec 2008 22:35:28 -0000 1.31
+++ sys/arch/x86/isa/clock.c 16 Jan 2009 00:26:16 -0000
@@ -175,6 +175,16 @@
static pcppi_tag_t ppicookie;
#endif /* PCPPI */
+#include "pwmaudio.h"
+#if NPWMAUDIO > 0
+#include <dev/isa/pwmaudiovar.h>
+struct pwmaudio_softc *pwmaudio_softc;
+
+static u_long tvaldiv = 0;
+static u_long hardskip = 0;
+#endif
+
+
#ifdef CLOCKDEBUG
int clock_debug = 0;
#define DPRINTF(arg) if (clock_debug) printf arg
@@ -182,6 +192,8 @@
#define DPRINTF(arg)
#endif
+extern void (*initclock_func)(void); /* XXX put in header file */
+
/* Used by lapic.c */
unsigned int gettick(void);
void sysbeep(int, int);
@@ -336,7 +348,30 @@
* set to. Also, correctly round
* this by carrying an extra bit through the division.
*/
+
+#if NPWMAUDIO > 0
+ struct pwmaudio_softc *sc = pwmaudio_softc;
+ int samplingrate;
+
+ if (sc == NULL) { /* Before pwmaudio(4) is attached. */
+ samplingrate = hz;
+ }
+ else { /* After pwmaudio(4) has attached. */
+ samplingrate = sc->sc_samplingrate;
+ /* Save a reference to i8254_timecounter */
+ sc->sc_timecounter = &i8254_timecounter;
+ }
+
+ /* Adjust the timecounter spec
+ * i8254_timecounter.quality = samplingrate
+ */
+ tval = (freq * 2) / (u_long) samplingrate;
+ tvaldiv = samplingrate / (u_long) hz;
+
+
+#else
tval = (freq * 2) / (u_long) hz;
+#endif
tval = (tval / 2) + (tval & 0x1);
/* initialize 8254 clock */
@@ -402,7 +437,60 @@
{
tickle_tc();
- hardclock((struct clockframe *)frame);
+#if NPWMAUDIO > 0
+
+ struct pwmaudio_softc *sc = pwmaudio_softc;
+ u_long tval;
+
+ if ((sc != NULL) && (sc->playing == true)) {
+ if (sc->blknow <= sc->blkend) {
+
+ /* Processing: signed int -> unsigned long, scale wrt rtclock_tval */
+ tval = (((u_long)((1 << 15) + (signed long)*(sc->blknow++)) * rtclock_tval) >> 16);
+
+ /* Adjust volume */
+ tval = tval * sc->sc_spkrvolume / AUDIO_MAX_GAIN;
+
+ tval |= 0x1; /* (1 < tval < rtclock_tval) */
+
+ /* Init counter 2, tied to the PC Speaker. */
+ outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL2 | TIMER_16BIT | TIMER_INTTC);
+ outb(IO_TIMER1 + TIMER_CNTR2, tval % 256);
+ outb(IO_TIMER1 + TIMER_CNTR2, tval / 256);
+
+ if ((((size_t)sc->blknow - (size_t)sc->blkstart) % sc->blksize) == 0) {
+ /* End of block reached: schedule the audio(4) callback */
+ softint_schedule(sc->sc_softintcookie);
+
+ }
+ }
+ else {
+ /* reset the blk pointers */
+ sc->blknow = sc->blkstart;
+ }
+
+ }
+
+ if (hardskip < tvaldiv){
+ hardskip++;
+ goto eoi;
+ }
+
+ hardskip = 0;
+
+#endif
+
+ /*
+ * We only handle the system clock if we're really in charge
+ * of it. XXX: poor API :XXX.
+ */
+ if (initclock_func == i8254_initclocks) {
+ hardclock((struct clockframe *)frame);
+ }
+
+#if NPWMAUDIO > 0
+eoi:
+#endif
#if NMCA > 0
if (MCA_system) {
@@ -410,6 +498,7 @@
outb(0x61, inb(0x61) | 0x80);
}
#endif
+
return -1;
}
@@ -575,13 +664,12 @@
void
i8254_initclocks(void)
{
-
/*
* XXX If you're doing strange things with multiple clocks, you might
* want to keep track of clock handlers.
*/
- (void)isa_intr_establish(NULL, 0, IST_PULSE, IPL_CLOCK,
- (int (*)(void *))clockintr, 0);
+ i8254_timecounter.tc_priv = isa_intr_establish(NULL, 0, IST_PULSE, IPL_CLOCK,
+ (int (*)(void *))clockintr, 0);
}
static void
Index: sys/dev/isa/files.isa
===================================================================
RCS file: /home/repos/netbsd-current/src/sys/dev/isa/files.isa,v
retrieving revision 1.157
diff -u -r1.157 files.isa
--- sys/dev/isa/files.isa 3 Apr 2008 22:46:22 -0000 1.157
+++ sys/dev/isa/files.isa 16 Jan 2009 02:05:09 -0000
@@ -443,6 +443,8 @@
file dev/isa/spkr.c spkr needs-flag
attach midi at pcppi with midi_pcppi: midisyn
file dev/isa/midi_pcppi.c midi_pcppi
+attach audio at pcppi with pwmaudio: auconv, mulaw, aurateconv
+file dev/isa/pwmaudio.c pwmaudio needs-flag
# AT Timer (TIMER 1)
attach attimer at isa with attimer_isa
Index: sys/dev/isa/pcppi.c
===================================================================
RCS file: /home/repos/netbsd-current/src/sys/dev/isa/pcppi.c,v
retrieving revision 1.32
diff -u -r1.32 pcppi.c
--- sys/dev/isa/pcppi.c 5 Mar 2008 22:46:43 -0000 1.32
+++ sys/dev/isa/pcppi.c 14 Jan 2009 23:16:49 -0000
@@ -48,6 +48,7 @@
#include <dev/isa/isavar.h>
#include <dev/isa/pcppireg.h>
#include <dev/isa/pcppivar.h>
+#include "pwmaudio.h"
#include "pckbd.h"
#if NPCKBD > 0
@@ -207,7 +208,7 @@
sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0;
-#if NPCKBD > 0
+#if ((NPCKBD > 0) && (NPWMAUDIO == 0))
/* Provide a beeper for the PC Keyboard, if there isn't one already. */
pckbd_hookup_bell(pcppi_pckbd_bell, sc);
#endif
Index: sys/dev/isa/pwmaudio.c
===================================================================
RCS file: sys/dev/isa/pwmaudio.c
diff -N sys/dev/isa/pwmaudio.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ sys/dev/isa/pwmaudio.c 16 Jan 2009 23:23:59 -0000
@@ -0,0 +1,889 @@
+/* $NetBSD$ */
+
+/*-
+ * Copyright (c) 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Written by Cherry G. Mathew <cherry@zyx.in> with bits and pieces
+ * from auich(4) and ym(4)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD$");
+
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/errno.h>
+#include <sys/bus.h>
+#include <sys/callout.h>
+#include <sys/param.h>
+#include <sys/cpu.h>
+#include <sys/fcntl.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+
+#include <sys/audioio.h>
+#include <dev/audio_if.h>
+#include <dev/audiovar.h>
+#include <dev/mulaw.h>
+#include <dev/auconv.h>
+
+#include <dev/ic/attimervar.h>
+#include <dev/ic/i8253reg.h>
+#include <dev/isa/isavar.h>
+
+#include "pwmaudio.h"
+
+#include <dev/isa/pwmaudiovar.h>
+#include <dev/isa/pcppivar.h>
+#include <dev/isa/pcppireg.h>
+
+#include <uvm/uvm_extern.h>
+#include <uvm/uvm_map.h>
+
+
+extern void (*initclock_func)(void); /* XXX put in header file */
+
+static int pwmaudio_open(void *, int);
+static void pwmaudio_close(void *);
+static int pwmaudio_query_encoding(void *, audio_encoding_t *);
+static int pwmaudio_set_params(void *, int, int, audio_params_t *,
+ audio_params_t *, stream_filter_list_t *,
+ stream_filter_list_t *);
+static int pwmaudio_round_blocksize(void *, int, int, const audio_params_t *);
+static int pwmaudio_halt_output(void *);
+static int pwmaudio_halt_input(void *);
+
+static int pwmaudio_speaker_ctl(void *, int);
+static int pwmaudio_getdev(void *, struct audio_device *);
+
+/* Mixer functions. Stubs for now. */
+static int pwmaudio_set_port(void *, mixer_ctrl_t *);
+static int pwmaudio_get_port(void *, mixer_ctrl_t *);
+
+static int pwmaudio_query_devinfo(void *, mixer_devinfo_t *);
+
+
+static size_t pwmaudio_round_buffersize(void *, int, size_t);
+static paddr_t pwmaudio_mappage(void *, void *, off_t, int);
+static int pwmaudio_get_props(void *);
+static int pwmaudio_trigger_output(void *, void *, void *, int, void (*)(void *),
+ void *, const audio_params_t *);
+static int pwmaudio_trigger_input(void *, void *, void *, int, void (*)(void *),
+ void *, const audio_params_t *);
+static int pwmaudio_sysctl_verify(SYSCTLFN_ARGS);
+
+extern struct pwmaudio_softc *pwmaudio_softc;
+
+/*
+ * We update the actual sampling rate only after an open/close pair.
+ * This value caches the sampling rate until the next open/close.
+ */
+static int pwmaudio_sampling_rate = 22000;
+
+/* H/W driver info */
+struct audio_device pwmaudiodev = { "PC Speaker (PWM)",
+ "0.2",
+ "pwmaudio"
+};
+
+static const struct audio_format pwmaudio_formats[PWMAUDIO_NFORMATS] = {
+ {
+ .driver_data = NULL,
+ .mode = AUMODE_PLAY,
+ .encoding = AUDIO_ENCODING_SLINEAR_LE,
+ .validbits = 16,
+ .precision = 16,
+ .channels = 1,
+ .channel_mask = AUFMT_MONAURAL,
+ .frequency_type = 1,
+
+ /* Keep this in sync with pwmaudio_sampling_rate above */
+ .frequency = {22000}
+ }
+};
+
+static const struct audio_hw_if pwmaudio_hw_if = {
+ .open = pwmaudio_open,
+ .close = pwmaudio_close,
+ .drain = NULL,
+ .query_encoding = pwmaudio_query_encoding,
+ .set_params = pwmaudio_set_params,
+ .round_blocksize = pwmaudio_round_blocksize,
+ .commit_settings = NULL,
+ .init_output = NULL,
+ .init_input = NULL,
+ .start_output = NULL,
+ .start_input = NULL,
+ .halt_output = pwmaudio_halt_output,
+ .halt_input = pwmaudio_halt_input,
+ .speaker_ctl = pwmaudio_speaker_ctl,
+ .getdev = pwmaudio_getdev,
+ .setfd = NULL,
+
+ .set_port = pwmaudio_set_port,
+ .get_port = pwmaudio_get_port,
+ .query_devinfo = pwmaudio_query_devinfo,
+
+ /* Memory allocation handled by audio(4) */
+ .allocm = NULL,
+ .freem = NULL,
+ .round_buffersize = pwmaudio_round_buffersize,
+ .mappage = pwmaudio_mappage,
+ .get_props = pwmaudio_get_props,
+ .trigger_output = pwmaudio_trigger_output,
+ .trigger_input = pwmaudio_trigger_input,
+ .dev_ioctl = NULL,
+ .powerstate = NULL,
+};
+
+CFATTACH_DECL_NEW(pwmaudio, sizeof(struct pwmaudio_softc),
+ pwmaudio_match, pwmaudio_attach, pwmaudio_detach, NULL);
+
+int
+pwmaudio_match(device_t parent, cfdata_t match, void *aux)
+{
+ return 1;
+}
+
+/* Attachment is a bit complicated because we have in effect, two
+ * parent devices (pcppi(4) and attimer(4)).
+ * We therefore defer the audio(4) attachment to
+ * pwmaudio_pcppi_attach() See below:
+ * This ensures that both parents are attached, failing which we do
+ * not attach the driver to the audio subsystem.
+ */
+
+void
+pwmaudio_attach(device_t parent, device_t self, void *aux)
+{
+
+ struct pcppi_softc *ppi_sc;
+ struct pwmaudio_softc *sc;
+
+ ppi_sc = device_private(parent);
+ sc = device_private(self);
+
+ /*
+ * Global variable shim, because there can only be one
+ * IO_TIMER1 on isa busses
+ */
+ pwmaudio_softc = sc;
+
+ /* Initialise some softc members to default values */
+ sc->sc_ppi = ppi_sc;
+ sc->sc_open = 0;
+ sc->sc_samplingrate = hz; /* This is set to sampling rate on open(). */
+ sc->sc_spkrvolume = AUDIO_MAX_GAIN / 2;
+
+ aprint_normal(": XT PC Speaker driven with PWM\n";
+
+ /*
+ * We need to defer config until all devices have been
+ * attached, to make sure that the pcppi is tied to at least
+ * one attimer.
+ */
+
+ config_finalize_register(self, pwmaudio_pcppi_attach);
+}
+
+int
+pwmaudio_detach(device_t self, int flags)
+{
+ struct pwmaudio_softc *sc;
+
+ sc = device_private(self);
+
+ /* Unregister auconv encodings. */
+ if (sc->sc_encodings && auconv_delete_encodings(sc->sc_encodings)) {
+ return ENXIO;
+ }
+
+ /* shutdown last registered (via pwmaudio_trigger) softint */
+
+ if (sc->sc_softintcookie != NULL) {
+ softint_disestablish(sc->sc_softintcookie);
+ sc->sc_softintcookie = NULL;
+ }
+
+ return 0;
+}
+
+extern void audioattach(device_t, device_t, void *); /* XXX: Ugly force export from audio.c */
+
+/* This function is called by the deferred attachment from pcppi. It
+ * initialises the audio softc, before passing control to the audio
+ * attach.
+ */
+
+int
+pwmaudio_pcppi_attach(device_t self)
+{
+
+ device_t parent;
+ struct pcppi_softc *ppi_sc;
+ struct attimer_softc *attimer_sc;
+ struct pwmaudio_softc *sc;
+ struct audio_softc *asc;
+
+
+ const struct sysctlnode *node, *node_samplingrate;
+ int err, node_pwmaudio;
+
+ parent = device_parent(self);
+ ppi_sc = device_private(parent);
+ attimer_sc = device_private(ppi_sc->sc_timer);
+ sc = device_private(self);
+ asc = &sc->audio_sc;
+
+ /* We don't attach twice. */
+ if (sc->sc_sysctlnode != 0){
+ return 0;
+ }
+
+ if ((attimer_sc == NULL) || !(attimer_sc->sc_flags & ATT_ATTACHED)){
+ aprint_error_dev(self,
+ "Skipping attach to %s - couldn't find associated timer.\n",
+ device_xname(parent));
+ return 0;
+ }
+
+ aprint_normal_dev(self, "%s initialised to interrupt at @ %dHz while playing",
+ device_xname(ppi_sc->sc_timer),
+ pwmaudio_sampling_rate);
+
+ /* auconv encodings */
+ memcpy(sc->sc_audio_formats, pwmaudio_formats, sizeof(pwmaudio_formats));
+ if (auconv_create_encodings(sc->sc_audio_formats, PWMAUDIO_NFORMATS,
+ &sc->sc_encodings) != 0){
+ return 0;
+ }
+
+ /* If all is well, attach to the audio subsystem */
+
+ /* Switch off speaker */
+ pwmaudio_speaker_ctl(sc, SPKR_OFF);
+
+ /* Update the audio_softc we service. */
+ asc->dev = self;
+ asc->sc_dev = parent;
+
+ asc->hw_if = &pwmaudio_hw_if;
+ asc->hw_hdl = sc;
+
+ audio_attach(asc);
+
+ /* Kickstart the 8254. */
+ initrtclock(TIMER_FREQ);
+
+ /* If the main system timer is not the 8254, it has not been
+ * programmed to interrupt. See: x86/x86/lapic.c
+ * Do it now.
+ */
+ if (sc->sc_timecounter->tc_priv == NULL) {
+ /* Register the interrupt handler, and enable
+ * interrupts.
+ */
+ i8254_initclocks();
+ }
+
+
+ /* sysctl nodes */
+ err = sysctl_createv(&sc->sc_log, 0, NULL, NULL, 0,
+ CTLTYPE_NODE, "hw", NULL, NULL, 0, NULL, 0,
+ CTL_HW, CTL_EOL);
+ if (err != 0)
+ goto sysctl_err;
+ err = sysctl_createv(&sc->sc_log, 0, NULL, &node, 0,
+ CTLTYPE_NODE, device_xname(self), NULL, NULL, 0,
+ NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL);
+ if (err != 0)
+ goto sysctl_err;
+
+ node_pwmaudio = node->sysctl_num;
+
+ err = sysctl_createv(&sc->sc_log, 0, NULL, &node_samplingrate,
+ CTLFLAG_READWRITE,
+ CTLTYPE_INT, "samplingrate",
+ SYSCTL_DESCR("sampling rate (the 8254 interrupts at this rate)"),
+ pwmaudio_sysctl_verify, 0, sc, 0,
+ CTL_HW, node_pwmaudio, CTL_CREATE, CTL_EOL);
+ if (err != 0)
+ goto sysctl_err;
+
+ sc->sc_sysctlnode = node_samplingrate->sysctl_num;
+
+ return 0;
+
+sysctl_err:
+ aprint_error_dev(self,
+ "failed to add sysctl nodes. (%d)\n", err);
+ return 0; /* failure of sysctl is not fatal. */
+}
+
+
+static int
+pwmaudio_sysctl_verify(SYSCTLFN_ARGS)
+{
+ int error, tmp;
+ struct sysctlnode node;
+ struct pwmaudio_softc *sc;
+
+ node = *rnode;
+ sc = rnode->sysctl_data;
+ if (node.sysctl_num == sc->sc_sysctlnode) {
+ tmp = pwmaudio_sampling_rate;
+ node.sysctl_data = &tmp;
+ error = sysctl_lookup(SYSCTLFN_CALL(&node));
+ if (error || newp == NULL)
+ return error;
+
+ if (tmp < 8000 || tmp > 44000)
+ return EINVAL;
+ pwmaudio_sampling_rate = tmp;
+ }
+
+ return 0;
+}
+
+
+static int
+pwmaudio_open(void *addr, int flags)
+{
+ struct pwmaudio_softc *sc = addr;
+
+ if (!sc) {
+ return ENXIO;
+ }
+ if (sc->sc_open & FREAD) {
+ return EBUSY;
+ }
+
+ if (flags & FREAD) {
+ return ENXIO;
+ }
+
+ sc->sc_open |= FREAD;
+
+ /* Sync up with sampling rate, if required. */
+ if (sc->sc_samplingrate != pwmaudio_sampling_rate) {
+
+ sc->sc_samplingrate = pwmaudio_sampling_rate;
+
+ /* We need to re-do auconv filters if the sampling rate
+ * changes.
+ */
+
+ if (auconv_delete_encodings(sc->sc_encodings)) {
+ return ENXIO;
+ }
+
+ sc->sc_audio_formats[PWMAUDIO_NFORMATS - 1].frequency[0] = sc->sc_samplingrate;
+
+ if (auconv_create_encodings(sc->sc_audio_formats, PWMAUDIO_NFORMATS,
+ &sc->sc_encodings) != 0){
+ return ENXIO;
+ }
+
+ }
+
+ return 0;
+}
+
+static void
+pwmaudio_close(void *addr)
+{
+
+ struct pwmaudio_softc *sc = addr;
+
+ sc->sc_open &= ~FREAD;
+
+ /* Switch off speaker */
+ pwmaudio_speaker_ctl(addr, SPKR_OFF);
+
+ /* Signal the clock.c:clockintr() to stop playing. */
+ sc->playing = false;
+
+ return;
+
+}
+
+/* query_encoding: return current h/w encoding in
+ * audio_encoding_t *encp;
+ *
+ * INPUTS: addr -> points to the device sc, encp->index points to the
+ * index number of the encoding we're interested in.
+ *
+ * OUTPUTS: *encp is filled in with the current device encoding
+ *
+ * RETURNS: 0 on success, EINVAL on unsupported encoding index.
+ */
+
+static int
+pwmaudio_query_encoding(void *addr, audio_encoding_t *encp)
+{
+
+ struct pwmaudio_softc *sc = addr;
+
+ return auconv_query_encoding(sc->sc_encodings, encp);
+}
+
+
+/*
+ * set_params: set the hardware to operate under specified params.
+ *
+ * INPUTS: addr-> points to device sc,
+ * setmode is a subset of AUMODE_PLAY | AUMODE_RECORD,
+ * usemode is the current mode ( also a subset of above )
+ * pparm is the requisite audio_params to be set ( encoding,
+ * precision, etc. ) for playback.
+ * rparm is as pparm, but for recording.
+ * pfil and rfil are stream filter hooks to be added for
+ * particular modes.
+ *
+ * OUTPUTS: None. Just update the h/w and return 0 if all goes well.
+ *
+ * RETURNS: return 0 if all is well. If an unsupported parameter is
+ * requested, return EINVAL.
+ */
+
+
+static int
+pwmaudio_set_params(void *addr, int setmode, int usemode, audio_params_t *pparm,
+ audio_params_t *rparm, stream_filter_list_t *pfil,
+ stream_filter_list_t *rfil)
+{
+ struct pwmaudio_softc *sc = addr;
+
+ int index;
+
+ /* We don't support AUMODE_RECORD */
+ /* Bail out, if AUMODE_PLAY is not asked for. */
+ /* Note that we silently ignore the "record" aspect of
+ * AUMODE_PLAY | AUMODE_RECORD
+ */
+
+ if ((setmode & AUMODE_RECORD) &&
+ !(setmode & AUMODE_PLAY)) {
+ printf("setmode failed\n");
+ return EINVAL;
+ }
+
+ index = auconv_set_converter(sc->sc_audio_formats, PWMAUDIO_NFORMATS,
+ setmode, pparm, TRUE, pfil);
+
+ if (index < 0) {
+ printf("set_convertor failed\n");
+ return EINVAL;
+ }
+
+
+ return 0;
+
+}
+
+/*
+ * round_blocksize: A block is a DMA-able unit of memory. Some DMA h/w
+ * have alignment and size constraints, which are
+ * implemented via this hook.
+ * INPUTS: 'addr' is the h/w sc, 'blksize' is the current
+ * blocksize that will be requested. 'mode' is the
+ * current h/w mode ( AUMODE_PLAY | AUMODE_RECORD),
+ * 'param' is the current param settings of h/w.
+ *
+ * OUTPUTS/RETURNS: The rounded down size of a block of memory.
+ */
+
+static int
+pwmaudio_round_blocksize(void *addr, int blksize, int mode,
+ const audio_params_t *param)
+{
+
+ /* Our alignment constraints are slim. Since we aim to support
+ * 16bit linear PCM (see sc_audio_formats[]), we have block
+ * sizes which are a multiple of 2 bytes, for now.
+ */
+
+ return blksize & -2;
+
+}
+
+
+/*
+ * halt_output: Stop playing _now_
+ *
+ * INPUTS: 'addr' is the h/w sc
+ *
+ * OUTPUTS/RETURNS: 0 on success.
+ */
+
+static int
+pwmaudio_halt_output(void *addr)
+{
+ struct pwmaudio_softc *sc = addr;
+
+ /* Flag the interrupt handler. */
+ sc->playing = false;
+
+ /* Bring down the 8254 interrupt rate when we're not using it
+ * for playback.
+ */
+ {
+ sc->sc_samplingrate = hz;
+ if (timecounter != sc->sc_timecounter) {
+ initrtclock(0);
+ return 0;
+ }
+ initrtclock(TIMER_FREQ);
+ }
+
+ return 0;
+}
+
+/*
+ * halt_input: Stop recording _now_
+ *
+ * INPUTS: 'addr' is the h/w sc
+ *
+ * OUTPUTS/RETURNS: ENXIO. We don't support record.
+ */
+
+static int
+pwmaudio_halt_input(void *addr)
+{
+
+ /* We don't support input */
+ return ENXIO;
+}
+
+
+/*
+ * speaker_ctl: Switch the speaker on/off
+ *
+ * INPUTS: 'addr' is the h/w sc.
+ * spkr_switch is SPKR_ON or SPKR_OFF
+ *
+ * OUTPUTS/RETURNS: 0 on success. EINVAL on invalid 'spkr_switch'.
+ */
+
+static int
+pwmaudio_speaker_ctl(void *addr, int spkr_switch)
+{
+
+ struct pwmaudio_softc *sc = addr;
+ struct pcppi_softc *ppisc;
+
+ ppisc = sc->sc_ppi;
+
+ switch (spkr_switch) {
+ case SPKR_ON:
+ /* enable speaker */
+ bus_space_write_1(ppisc->sc_iot, ppisc->sc_ppi_ioh, 0,
+ bus_space_read_1(ppisc->sc_iot, ppisc->sc_ppi_ioh, 0)
+ | PIT_SPKR);
+ break;
+ case SPKR_OFF:
+ bus_space_write_1(ppisc->sc_iot, ppisc->sc_ppi_ioh, 0,
+ bus_space_read_1(ppisc->sc_iot, ppisc->sc_ppi_ioh, 0)
+ & ~PIT_SPKR);
+ break;
+ default:
+ return EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * getdev: Return information about the pwmaudio(4) driver.
+ *
+ * INPUTS: 'addr' is the h/w sc
+ * 'adev' is filled with descriptive information
+ *
+ * RETURNS: 0 on success
+ *
+ */
+
+static int
+pwmaudio_getdev(void *addr, struct audio_device *adev)
+{
+
+ *adev = pwmaudiodev;
+ return 0;
+}
+
+/* Mixer */
+
+enum {
+ PWMAUDIO_SPKRCLASS,
+ PWMAUDIO_SPKRVOLUME
+};
+
+/*
+ * set_port: Set the volume.
+ *
+ * INPUTS: 'addr' is the h/w sc
+ * 'mxc' contains volume information.
+ *
+ * OUTPUTS: EINVAL/0 on invalid input/success.
+ */
+
+static int
+pwmaudio_set_port(void *addr, mixer_ctrl_t *mxc)
+{
+
+ struct pwmaudio_softc *sc = addr;
+
+ if (mxc->dev == PWMAUDIO_SPKRVOLUME) {
+ mxc->type = AUDIO_MIXER_VALUE;
+ mxc->un.value.num_channels = 1;
+ sc->sc_spkrvolume = mxc->un.value.level[AUDIO_MIXER_LEVEL_MONO];
+ return 0;
+ }
+
+
+ return EINVAL;
+}
+
+/*
+ * set_port: Set the volume.
+ *
+ * INPUTS: 'addr' is the h/w sc
+ * 'mxc' will be filled in with volume
+ * information.
+ *
+ * OUTPUTS: EINVAL/0 on invalid input/success.
+ * volume info, via 'mxc'
+ */
+
+static int
+pwmaudio_get_port(void *addr, mixer_ctrl_t *mxc)
+{
+
+ struct pwmaudio_softc *sc = addr;
+
+ if (mxc->dev == PWMAUDIO_SPKRVOLUME) {
+ mxc->type = AUDIO_MIXER_VALUE;
+ mxc->un.value.num_channels = 1;
+ mxc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_spkrvolume;
+ return 0;
+ }
+
+ return EINVAL;
+}
+
+/*
+ * query_devinfo: Pass up mixer information to the audio(4)
+ * layer.
+ *
+ * INPUTS: 'addr' is the h/w sc
+ * 'mxd' is the pointer to output to mixer info
+ *
+ * OUTPUTS/RETURNS: 'mxd' is filled in with mixer info.
+ * 0 on success, error, otherwise.
+ */
+
+static int
+pwmaudio_query_devinfo(void *addr, mixer_devinfo_t *mxd)
+{
+
+ switch(mxd->index) {
+ case PWMAUDIO_SPKRCLASS:
+ mxd->type = AUDIO_MIXER_CLASS;
+ mxd->mixer_class = PWMAUDIO_SPKRCLASS;
+ strcpy(mxd->label.name, AudioCoutputs);
+ mxd->next = mxd->prev = AUDIO_MIXER_LAST;
+ break;
+
+ case PWMAUDIO_SPKRVOLUME:
+ mxd->type = AUDIO_MIXER_VALUE;
+ mxd->mixer_class = PWMAUDIO_SPKRCLASS;
+ strcpy(mxd->label.name, AudioNspeaker);
+ strcpy(mxd->un.v.units.name, AudioNvolume);
+ mxd->un.v.num_channels = 1;
+ mxd->un.v.delta = PWM_MIXER_DELTA;
+ mxd->next = mxd->prev = AUDIO_MIXER_LAST;
+ break;
+
+ default:
+ /* Unsupported mixer channel queried. */
+ return ENXIO;
+ }
+
+ return 0;
+}
+
+/*
+ * round_buffersize: A block is a DMA-able unit of memory. Some DMA h/w
+ * have alignment and size constraints, which are
+ * implemented via this hook.
+ * INPUTS: 'addr' is the h/w sc, 'bufsize' is the current
+ * buffer size for the ring buffer in
+ * question. 'direction' is the mode (AUMODE_PLAY |
+ * AUMODE_RECORD) for which the ring buffer is
+ * specified.
+ *
+ * OUTPUTS/RETURNS: The rounded down size of the ring buffer.
+ */
+
+static size_t
+pwmaudio_round_buffersize(void *addr, int direction, size_t bufsize)
+{
+
+ return bufsize & -4;
+
+}
+
+/*
+ * mappage: Backend to map DMA memory to userland.
+ *
+ * INPUTS: 'addr' is the h/w sc. 'start' with 'foffset'
+ * is the userspace address where the buffer
+ * mapping is requested.
+ * 'prot' is the page protections of the mapping.
+ *
+ * OUTPUTS: -1 on error. paddr of the mapping for the
+ * asking process, on success.
+ */
+
+static paddr_t
+pwmaudio_mappage(void *addr, void *start, off_t foffset, int prot)
+{
+ struct vm_map_entry *entry;
+ vsize_t mapoffset;
+ paddr_t pstart;
+
+ vm_map_lock(kernel_map);
+ if (uvm_map_lookup_entry(kernel_map, (vaddr_t) start, &entry) == false) {
+ return 0;
+ }
+
+ /* Confirm if the map we got is sane. */
+
+ if ((vaddr_t)start < entry->start) {
+ return -1;
+ }
+
+ /* The offset in bytes from the map, entry start */
+ mapoffset = ((vaddr_t)start - entry->start);
+
+ pstart = entry->start + mapoffset;
+ vm_map_unlock(kernel_map);
+
+ return pstart;
+ /* XXX: Untested. Remove me when done testing */
+}
+
+/*
+ * get_props: 'addr' is the h/w sc
+ *
+ * INPUTS: None.
+ *
+ * OUTPUTS: properties passed up to the audio(4) driver.
+ */
+
+static int
+pwmaudio_get_props(void *addr)
+{
+
+ return (AUDIO_PROP_MMAP);
+}
+
+/*
+ * INPUTS: 'addr' -> the h/w sc. 'start' is the start address.
+ * 'end' is the end address of the 'DMA' ring buffer.
+ * 'blksize' is the number of bytes to be played by this 'DMA'
+ * operation.
+ * 'intp' is called after each block is processed.
+ * 'aparams' contains a description of the nature of the
+ * encoding of the audio data in the buffer.
+ *
+ * OUTPUTS: none.
+ *
+ * RETURNS: 0 on success.
+ *
+ */
+
+static int pwmaudio_trigger_output(void *addr, void *start, void *end, int blksize,
+ void (*intp)(void *), void *arg, const audio_params_t *aparams)
+{
+
+ struct pwmaudio_softc *sc = addr;
+
+ if (start >= end) {
+ return EINVAL;
+ }
+
+ if (sc->sc_pintr != intp ||
+ sc->sc_parg != arg) {
+ sc->sc_pintr = intp;
+ sc->sc_parg = arg;
+
+ /* Register the soft interrupt. */
+
+ if (sc->sc_softintcookie != NULL) {
+ softint_disestablish(sc->sc_softintcookie);
+ sc->sc_softintcookie = NULL;
+ }
+ /* We use the highest priority softint */
+ sc->sc_softintcookie = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, intp, arg);
+ }
+
+ /* Update sc info. */
+ sc->sc_samplingrate = pwmaudio_sampling_rate;
+ sc->blksize = blksize;
+ sc->blknow = sc->blkstart = start;
+ sc->blkend = end;
+
+ /* Crank up the timer clock interrupt rate. */
+ initrtclock(TIMER_FREQ);
+
+ /* Flag interrupt handler */
+ sc->playing = true;
+
+ return 0;
+}
+
+/*
+ * INPUTS: 'addr' -> the h/w sc. 'start' is the start address.
+ * 'end' is the end address of the 'DMA' ring buffer.
+ * 'blksize' is the number of bytes to be played by this 'DMA'
+ * operation.
+ * 'intp' is called after each block is processed.
+ * 'aparams' contains a description of the nature of the
+ * encoding of the audio data in the buffer.
+ *
+ * OUTPUTS: none.
+ *
+ * RETURNS: 0 on success.
+ *
+ */
+
+static int pwmaudio_trigger_input(void *addrl, void *start, void *end, int blksize,
+ void (*intp)(void *), void *arg, const audio_params_t *aparams)
+{
+ /* Nope, we don't support capture */
+
+ return ENXIO;
+}
Index: sys/dev/isa/pwmaudiovar.h
===================================================================
RCS file: sys/dev/isa/pwmaudiovar.h
diff -N sys/dev/isa/pwmaudiovar.h
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ sys/dev/isa/pwmaudiovar.h 15 Jan 2009 00:20:01 -0000
@@ -0,0 +1,68 @@
+/* $NetBSD$ */
+
+/*
+ * pwmaudiovar.h: definitions specific to the pwmaudio driver.
+ */
+
+#ifndef _DEV_ISA_PWMAUDIOVAR_H_
+#define _DEV_ISA_PWMAUDIOVAR_H_
+
+#ifndef NSPKR
+#include "spkr.h"
+#endif /* NSPKR */
+/* The pwmaudio driver is exclusive to the spkr tone driver: "spkr at pcppi" */
+#if NSPKR > 0
+#error spkr at pcppi, and pwmaudio at pcppi are mutually exclusive. Please check your config file.
+#else
+
+#include <dev/auconv.h>
+#include <dev/audiovar.h>
+#include <sys/timetc.h>
+
+#define PWM_MIXER_DELTA 16
+
+struct pwmaudio_softc {
+ /* audio(9) softc. */
+ struct audio_softc audio_sc;
+
+ struct pcppi_softc *sc_ppi;
+
+ int sc_open; /* We don't support multiple opens */
+ int sc_samplingrate; /* Only updated at open() */
+ u_char sc_spkrvolume; /* Mixer volume */
+
+ bool playing; /* Flag, polled by clock.c:clockintr() */
+
+ int blksize; /* Size of the DMA circular buffer */
+ int16_t *blkstart; /* Pointer to the start of the buffer */
+ int16_t *blknow; /* Pointer to current sample */
+ int16_t *blkend; /* Pointer to the end of the buffer */
+
+
+ void (*sc_pintr)(void *); /* Callback from audio(4) */
+ void *sc_parg; /* The argument that the audio callback is called with. see audio_if.h */
+
+ void *sc_softintcookie; /* Cookie returned by softint_establish() */
+
+ struct timecounter *sc_timecounter; /* Pointer to the i8254 timer */
+
+#define PWMAUDIO_NFORMATS 1
+
+ /* auconv encoding related */
+ struct audio_format sc_audio_formats[PWMAUDIO_NFORMATS];
+ struct audio_encoding_set *sc_encodings;
+
+ struct sysctllog *sc_log; /* sysctl related */
+ int sc_sysctlnode;
+
+};
+
+int pwmaudio_match(device_t, cfdata_t, void *);
+void pwmaudio_attach(device_t, device_t, void *);
+int pwmaudio_detach(device_t, int);
+
+int pwmaudio_pcppi_attach(device_t);
+
+
+#endif /* NSPKR */
+#endif /* _DEV_ISA_PWMAUDIOVAR_H_ */