/*
 * ALSA SoC TLV320AIC23 codec driver I2C interface
 *
 * Author:      Arun KS, <arunks@mistralsolutions.com>
 * Copyright:   (C) 2008 Mistral Solutions Pvt Ltd.,
 *
 * Based on sound/soc/codecs/wm8731.c by Richard Purdie
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <sound/soc.h>

#include "tlv320aic23.h"

static int tlv320aic23_i2c_probe(struct i2c_client *i2c,
				 const struct i2c_device_id *i2c_id)
{
	struct regmap *regmap;

	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EINVAL;

	regmap = devm_regmap_init_i2c(i2c, &tlv320aic23_regmap);
	return tlv320aic23_probe(&i2c->dev, regmap);
}

static int tlv320aic23_i2c_remove(struct i2c_client *i2c)
{
	snd_soc_unregister_codec(&i2c->dev);
	return 0;
}

static const struct i2c_device_id tlv320aic23_id[] = {
	{"tlv320aic23", 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);

static const struct of_device_id tlv320aic23_of_match[] = {
	{ .compatible = "ti,tlv320aic23", },
	{ }
};
MODULE_DEVICE_TABLE(of, tlv320aic23_of_match);

static struct i2c_driver tlv320aic23_i2c_driver = {
	.driver = {
		   .name = "tlv320aic23-codec",
		   .of_match_table = of_match_ptr(tlv320aic23_of_match),
		   },
	.probe = tlv320aic23_i2c_probe,
	.remove = tlv320aic23_i2c_remove,
	.id_table = tlv320aic23_id,
};

module_i2c_driver(tlv320aic23_i2c_driver);

MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver I2C");
MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
MODULE_LICENSE("GPL");
7cdd7de5a54502bd0aa'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/'>
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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Lukáš Lalinský &lt;lukas@oxygene.sk&gt;</td><td class='right'>2017-01-20 19:46:34 +0100</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-25 11:02:29 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'>d9b2997e4a0a874e452df7cdd7de5a54502bd0aa</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'>391abd808c8ad3d2e0e2ac0b769e40d88b468973</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=3ba7b7795b7e8889af1377904c55c7fae9e0c775'>3ba7b7795b7e8889af1377904c55c7fae9e0c775</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa&amp;id2=3ba7b7795b7e8889af1377904c55c7fae9e0c775'>diff</a>)</td></tr></table>
<div class='commit-subject'>USB: Add quirk for WORLDE easykey.25 MIDI keyboard</div><div class='commit-msg'>Add a quirk for WORLDE easykey.25 MIDI keyboard (idVendor=0218,
idProduct=0401). The device reports that it has config string
descriptor at index 3, but when the system selects the configuration
and tries to get the description, it returns a -EPROTO error,
the communication restarts and this keeps repeating over and over again.
Not requesting the string descriptor makes the device work correctly.

Relevant info from Wireshark:

[...]

CONFIGURATION DESCRIPTOR
    bLength: 9
    bDescriptorType: 0x02 (CONFIGURATION)
    wTotalLength: 101
    bNumInterfaces: 2
    bConfigurationValue: 1
    iConfiguration: 3
    Configuration bmAttributes: 0xc0  SELF-POWERED  NO REMOTE-WAKEUP
        1... .... = Must be 1: Must be 1 for USB 1.1 and higher
        .1.. .... = Self-Powered: This device is SELF-POWERED
        ..0. .... = Remote Wakeup: This device does NOT support remote wakeup
    bMaxPower: 50  (100mA)

[...]

     45 0.369104       host                  2.38.0                USB      64     GET DESCRIPTOR Request STRING

[...]

URB setup
    bmRequestType: 0x80
        1... .... = Direction: Device-to-host
        .00. .... = Type: Standard (0x00)
        ...0 0000 = Recipient: Device (0x00)
    bRequest: GET DESCRIPTOR (6)
    Descriptor Index: 0x03
    bDescriptorType: 0x03
    Language Id: English (United States) (0x0409)
    wLength: 255

     46 0.369255       2.38.0                host                  USB      64     GET DESCRIPTOR Response STRING[Malformed Packet]

[...]

Frame 46: 64 bytes on wire (512 bits), 64 bytes captured (512 bits) on interface 0
USB URB
    [Source: 2.38.0]
    [Destination: host]
    URB id: 0xffff88021f62d480
    URB type: URB_COMPLETE ('C')
    URB transfer type: URB_CONTROL (0x02)
    Endpoint: 0x80, Direction: IN
    Device: 38
    URB bus id: 2
    Device setup request: not relevant ('-')
    Data: present (0)
    URB sec: 1484896277
    URB usec: 455031
    URB status: Protocol error (-EPROTO) (-71)
    URB length [bytes]: 0
    Data length [bytes]: 0
    [Request in: 45]
    [Time from request: 0.000151000 seconds]
    Unused Setup Header
    Interval: 0
    Start frame: 0
    Copy of Transfer Flags: 0x00000200
    Number of ISO descriptors: 0
[Malformed Packet: USB]
    [Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
        [Malformed Packet (Exception occurred)]
        [Severity level: Error]
        [Group: Malformed]

Signed-off-by: Lukáš Lalinský &lt;lukas@oxygene.sk&gt;
Cc: stable &lt;stable@vger.kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d9b2997e4a0a874e452df7cdd7de5a54502bd0aa'>Diffstat</a></div><table summary='diffstat' class='diffstat'>