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-rw-r--r--Documentation/DocBook/writing-an-alsa-driver.tmpl72
1 files changed, 27 insertions, 45 deletions
diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl
index 06741e925985..d0056a4e9c53 100644
--- a/Documentation/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl
@@ -468,8 +468,6 @@
return err;
}
- snd_card_set_dev(card, &pci->dev);
-
*rchip = chip;
return 0;
}
@@ -492,7 +490,8 @@
}
/* (2) */
- err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ 0, &card);
if (err < 0)
return err;
@@ -591,7 +590,8 @@
struct snd_card *card;
int err;
....
- err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ 0, &card);
]]>
</programlisting>
</informalexample>
@@ -809,28 +809,34 @@
<para>
As mentioned above, to create a card instance, call
- <function>snd_card_create()</function>.
+ <function>snd_card_new()</function>.
<informalexample>
<programlisting>
<![CDATA[
struct snd_card *card;
int err;
- err = snd_card_create(index, id, module, extra_size, &card);
+ err = snd_card_new(&pci->dev, index, id, module, extra_size, &card);
]]>
</programlisting>
</informalexample>
</para>
<para>
- The function takes five arguments, the card-index number, the
- id string, the module pointer (usually
+ The function takes six arguments: the parent device pointer,
+ the card-index number, the id string, the module pointer (usually
<constant>THIS_MODULE</constant>),
the size of extra-data space, and the pointer to return the
card instance. The extra_size argument is used to
allocate card-&gt;private_data for the
chip-specific data. Note that these data
- are allocated by <function>snd_card_create()</function>.
+ are allocated by <function>snd_card_new()</function>.
+ </para>
+
+ <para>
+ The first argument, the pointer of struct
+ <structname>device</structname>, specifies the parent device.
+ For PCI devices, typically &amp;pci-&gt; is passed there.
</para>
</section>
@@ -916,16 +922,16 @@
</para>
<section id="card-management-chip-specific-snd-card-new">
- <title>1. Allocating via <function>snd_card_create()</function>.</title>
+ <title>1. Allocating via <function>snd_card_new()</function>.</title>
<para>
As mentioned above, you can pass the extra-data-length
- to the 4th argument of <function>snd_card_create()</function>, i.e.
+ to the 5th argument of <function>snd_card_new()</function>, i.e.
<informalexample>
<programlisting>
<![CDATA[
- err = snd_card_create(index[dev], id[dev], THIS_MODULE,
- sizeof(struct mychip), &card);
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ sizeof(struct mychip), &card);
]]>
</programlisting>
</informalexample>
@@ -954,7 +960,7 @@
<para>
After allocating a card instance via
- <function>snd_card_create()</function> (with
+ <function>snd_card_new()</function> (with
<constant>0</constant> on the 4th arg), call
<function>kzalloc()</function>.
@@ -963,7 +969,8 @@
<![CDATA[
struct snd_card *card;
struct mychip *chip;
- err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ 0, &card);
.....
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
]]>
@@ -1170,8 +1177,6 @@
return err;
}
- snd_card_set_dev(card, &pci->dev);
-
*rchip = chip;
return 0;
}
@@ -1526,30 +1531,6 @@
</section>
- <section id="pci-resource-device-struct">
- <title>Registration of Device Struct</title>
- <para>
- At some point, typically after calling <function>snd_device_new()</function>,
- you need to register the struct <structname>device</structname> of the chip
- you're handling for udev and co. ALSA provides a macro for compatibility with
- older kernels. Simply call like the following:
- <informalexample>
- <programlisting>
-<![CDATA[
- snd_card_set_dev(card, &pci->dev);
-]]>
- </programlisting>
- </informalexample>
- so that it stores the PCI's device pointer to the card. This will be
- referred by ALSA core functions later when the devices are registered.
- </para>
- <para>
- In the case of non-PCI, pass the proper device struct pointer of the BUS
- instead. (In the case of legacy ISA without PnP, you don't have to do
- anything.)
- </para>
- </section>
-
<section id="pci-resource-entries">
<title>PCI Entries</title>
<para>
@@ -5740,7 +5721,8 @@ struct _snd_pcm_runtime {
struct mychip *chip;
int err;
....
- err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ 0, &card);
....
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
....
@@ -5752,7 +5734,7 @@ struct _snd_pcm_runtime {
</informalexample>
When you created the chip data with
- <function>snd_card_create()</function>, it's anyway accessible
+ <function>snd_card_new()</function>, it's anyway accessible
via <structfield>private_data</structfield> field.
<informalexample>
@@ -5766,8 +5748,8 @@ struct _snd_pcm_runtime {
struct mychip *chip;
int err;
....
- err = snd_card_create(index[dev], id[dev], THIS_MODULE,
- sizeof(struct mychip), &card);
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ sizeof(struct mychip), &card);
....
chip = card->private_data;
....
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