Initial dump of hda from maverick kernel Ubuntu-2.6.35-23.36

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 267 insertions, 0 deletions

diff --git a/usr/src/dkms_source_tree/hda_beep.c b/usr/src/dkms_source_tree/hda_beep.c
new file mode 100644
index 0000000..29714c8
--- /dev/null
+++ b/usr/src/dkms_source_tree/hda_beep.c
@@ -0,0 +1,267 @@
+/*
+ * Digital Beep Input Interface for HD-audio codec
+ *
+ * Author: Matthew Ranostay <mranostay@embeddedalley.com>
+ * Copyright (c) 2008 Embedded Alley Solutions Inc
+ *
+ *  This driver 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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This driver is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/input.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <sound/core.h>
+#include "hda_beep.h"
+#include "hda_local.h"
+
+enum {
+        DIGBEEP_HZ_STEP = 46875,        /* 46.875 Hz */
+        DIGBEEP_HZ_MIN = 93750,         /* 93.750 Hz */
+        DIGBEEP_HZ_MAX = 12000000,      /* 12 KHz */
+};
+
+static void snd_hda_generate_beep(struct work_struct *work)
+{
+        struct hda_beep *beep =
+                container_of(work, struct hda_beep, beep_work);
+        struct hda_codec *codec = beep->codec;
+
+        if (!beep->enabled)
+                return;
+
+        /* generate tone */
+        snd_hda_codec_write(codec, beep->nid, 0,
+                        AC_VERB_SET_BEEP_CONTROL, beep->tone);
+}
+
+/* (non-standard) Linear beep tone calculation for IDT/STAC codecs 
+ *
+ * The tone frequency of beep generator on IDT/STAC codecs is
+ * defined from the 8bit tone parameter, in Hz,
+ *    freq = 48000 * (257 - tone) / 1024
+ * that is from 12kHz to 93.75Hz in steps of 46.875 Hz
+ */
+static int beep_linear_tone(struct hda_beep *beep, int hz)
+{
+        if (hz <= 0)
+                return 0;
+        hz *= 1000; /* fixed point */
+        hz = hz - DIGBEEP_HZ_MIN
+                + DIGBEEP_HZ_STEP / 2; /* round to nearest step */
+        if (hz < 0)
+                hz = 0; /* turn off PC beep*/
+        else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
+                hz = 1; /* max frequency */
+        else {
+                hz /= DIGBEEP_HZ_STEP;
+                hz = 255 - hz;
+        }
+        return hz;
+}
+
+/* HD-audio standard beep tone parameter calculation
+ *
+ * The tone frequency in Hz is calculated as
+ *   freq = 48000 / (tone * 4)
+ * from 47Hz to 12kHz
+ */
+static int beep_standard_tone(struct hda_beep *beep, int hz)
+{
+        if (hz <= 0)
+                return 0; /* disabled */
+        hz = 12000 / hz;
+        if (hz > 0xff)
+                return 0xff;
+        if (hz <= 0)
+                return 1;
+        return hz;
+}
+
+static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
+                                unsigned int code, int hz)
+{
+        struct hda_beep *beep = input_get_drvdata(dev);
+
+        switch (code) {
+        case SND_BELL:
+                if (hz)
+                        hz = 1000;
+        case SND_TONE:
+                if (beep->linear_tone)
+                        beep->tone = beep_linear_tone(beep, hz);
+                else
+                        beep->tone = beep_standard_tone(beep, hz);
+                break;
+        default:
+                return -1;
+        }
+
+        /* schedule beep event */
+        schedule_work(&beep->beep_work);
+        return 0;
+}
+
+static void snd_hda_do_detach(struct hda_beep *beep)
+{
+        input_unregister_device(beep->dev);
+        beep->dev = NULL;
+        cancel_work_sync(&beep->beep_work);
+        /* turn off beep for sure */
+        snd_hda_codec_write(beep->codec, beep->nid, 0,
+                                  AC_VERB_SET_BEEP_CONTROL, 0);
+}
+
+static int snd_hda_do_attach(struct hda_beep *beep)
+{
+        struct input_dev *input_dev;
+        struct hda_codec *codec = beep->codec;
+        int err;
+
+        input_dev = input_allocate_device();
+        if (!input_dev) {
+                printk(KERN_INFO "hda_beep: unable to allocate input device\n");
+                return -ENOMEM;
+        }
+
+        /* setup digital beep device */
+        input_dev->name = "HDA Digital PCBeep";
+        input_dev->phys = beep->phys;
+        input_dev->id.bustype = BUS_PCI;
+
+        input_dev->id.vendor = codec->vendor_id >> 16;
+        input_dev->id.product = codec->vendor_id & 0xffff;
+        input_dev->id.version = 0x01;
+
+        input_dev->evbit[0] = BIT_MASK(EV_SND);
+        input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
+        input_dev->event = snd_hda_beep_event;
+        input_dev->dev.parent = &codec->bus->pci->dev;
+        input_set_drvdata(input_dev, beep);
+
+        err = input_register_device(input_dev);
+        if (err < 0) {
+                input_free_device(input_dev);
+                printk(KERN_INFO "hda_beep: unable to register input device\n");
+                return err;
+        }
+        beep->dev = input_dev;
+        return 0;
+}
+
+static void snd_hda_do_register(struct work_struct *work)
+{
+        struct hda_beep *beep =
+                container_of(work, struct hda_beep, register_work);
+
+        mutex_lock(&beep->mutex);
+        if (beep->enabled && !beep->dev)
+                snd_hda_do_attach(beep);
+        mutex_unlock(&beep->mutex);
+}
+
+static void snd_hda_do_unregister(struct work_struct *work)
+{
+        struct hda_beep *beep =
+                container_of(work, struct hda_beep, unregister_work.work);
+
+        mutex_lock(&beep->mutex);
+        if (!beep->enabled && beep->dev)
+                snd_hda_do_detach(beep);
+        mutex_unlock(&beep->mutex);
+}
+
+int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
+{
+        struct hda_beep *beep = codec->beep;
+        enable = !!enable;
+        if (beep == NULL)
+                return 0;
+        if (beep->enabled != enable) {
+                beep->enabled = enable;
+                if (!enable) {
+                        /* turn off beep */
+                        snd_hda_codec_write(beep->codec, beep->nid, 0,
+                                                  AC_VERB_SET_BEEP_CONTROL, 0);
+                }
+                if (beep->mode == HDA_BEEP_MODE_SWREG) {
+                        if (enable) {
+                                cancel_delayed_work(&beep->unregister_work);
+                                schedule_work(&beep->register_work);
+                        } else {
+                                schedule_delayed_work(&beep->unregister_work,
+                                                                           HZ);
+                        }
+                }
+                return 1;
+        }
+        return 0;
+}
+EXPORT_SYMBOL_HDA(snd_hda_enable_beep_device);
+
+int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
+{
+        struct hda_beep *beep;
+
+        if (!snd_hda_get_bool_hint(codec, "beep"))
+                return 0; /* disabled explicitly by hints */
+        if (codec->beep_mode == HDA_BEEP_MODE_OFF)
+                return 0; /* disabled by module option */
+
+        beep = kzalloc(sizeof(*beep), GFP_KERNEL);
+        if (beep == NULL)
+                return -ENOMEM;
+        snprintf(beep->phys, sizeof(beep->phys),
+                "card%d/codec#%d/beep0", codec->bus->card->number, codec->addr);
+        /* enable linear scale */
+        snd_hda_codec_write(codec, nid, 0,
+                AC_VERB_SET_DIGI_CONVERT_2, 0x01);
+
+        beep->nid = nid;
+        beep->codec = codec;
+        beep->mode = codec->beep_mode;
+        codec->beep = beep;
+
+        INIT_WORK(&beep->register_work, &snd_hda_do_register);
+        INIT_DELAYED_WORK(&beep->unregister_work, &snd_hda_do_unregister);
+        INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
+        mutex_init(&beep->mutex);
+
+        if (beep->mode == HDA_BEEP_MODE_ON) {
+                int err = snd_hda_do_attach(beep);
+                if (err < 0) {
+                        kfree(beep);
+                        codec->beep = NULL;
+                        return err;
+                }
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device);
+
+void snd_hda_detach_beep_device(struct hda_codec *codec)
+{
+        struct hda_beep *beep = codec->beep;
+        if (beep) {
+                cancel_work_sync(&beep->register_work);
+                cancel_delayed_work(&beep->unregister_work);
+                if (beep->dev)
+                        snd_hda_do_detach(beep);
+                codec->beep = NULL;
+                kfree(beep);
+        }
+}
+EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device);