[PATCHv3] usb: chipidea: add support for USB OTG controller on TI-NSPIRE

[Daniel Tang]

Hi,

On 25/11/2013, at 4:32 PM, Peter Chen <Peter.Chen at freescale.com> wrote:

> 
>> 
>> From: Daniel Tang <dt.tangr at gmail.com>
>> 
>> The USB controller in TI-NSPIRE calculators are based off either
>> Freescale's
>> USB OTG controller or the USB controller found in the IMX233, both of
>> which
>> are Chipidea compatible.
>> 
>> This patch adds a device tree binding for the controller.
>> 
>> Signed-off-by: Daniel Tang <dt.tangr at gmail.com>
>> ---
>> 
>> Changelog v3:
>> * Removed redundant module aliases
>> 
>> Changelog v2:
>> * Rename ci13xxx to ci_hdrc
>> * Fixed alignment issues
>> 
>> .../devicetree/bindings/usb/ci-hdrc-nspire.txt     | 17 +++++
>> drivers/usb/chipidea/Makefile                      |  1 +
>> drivers/usb/chipidea/ci_hdrc_nspire.c              | 72
>> ++++++++++++++++++++++
>> 3 files changed, 90 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/usb/ci-hdrc-
>> nspire.txt
>> create mode 100644 drivers/usb/chipidea/ci_hdrc_nspire.c
>> 
>> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-nspire.txt
>> b/Documentation/devicetree/bindings/usb/ci-hdrc-nspire.txt
>> new file mode 100644
>> index 0000000..5ba8e90
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-nspire.txt
>> @@ -0,0 +1,17 @@
>> +* TI-Nspire USB OTG Controller
>> +
>> +Required properties:
>> +- compatible: Should be "zevio,nspire-usb"
>> +- reg: Should contain registers location and length
>> +- interrupts: Should contain controller interrupt
>> +
>> +Recommended properies:
>> +- vbus-supply: regulator for vbus
>> +
>> +Examples:
>> +		usb0: usb at B0000000 {
>> +			reg = <0xB0000000 0x1000>;
>> +			compatible = "zevio,nspire-usb";
>> +			interrupts = <8>;
>> +			vbus-supply = <&vbus_reg>;
>> +		};
>> diff --git a/drivers/usb/chipidea/Makefile
>> b/drivers/usb/chipidea/Makefile
>> index a99d980..245ea4d 100644
>> --- a/drivers/usb/chipidea/Makefile
>> +++ b/drivers/usb/chipidea/Makefile
>> @@ -10,6 +10,7 @@ ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG)	+= debug.o
>> # Glue/Bridge layers go here
>> 
>> obj-$(CONFIG_USB_CHIPIDEA)	+= ci_hdrc_msm.o
>> +obj-$(CONFIG_USB_CHIPIDEA)	+= ci_hdrc_nspire.o
>> 
>> # PCI doesn't provide stubs, need to check
>> ifneq ($(CONFIG_PCI),)
>> diff --git a/drivers/usb/chipidea/ci_hdrc_nspire.c
>> b/drivers/usb/chipidea/ci_hdrc_nspire.c
>> new file mode 100644
>> index 0000000..517ce41
>> --- /dev/null
>> +++ b/drivers/usb/chipidea/ci_hdrc_nspire.c
>> @@ -0,0 +1,72 @@
>> +/*
>> + *	Copyright (C) 2013 Daniel Tang <tangrs at tangrs.id.au>
>> + *
>> + * 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.
>> + *
>> + * Based off drivers/usb/chipidea/ci_hdrc_msm.c
>> + *
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/usb/gadget.h>
>> +#include <linux/usb/chipidea.h>
>> +
>> +#include "ci.h"
>> +
>> +static struct ci_hdrc_platform_data ci_hdrc_nspire_platdata = {
>> +	.name			= "ci_hdrc_nspire",
>> +	.flags			= CI_HDRC_REGS_SHARED,
>> +	.capoffset		= DEF_CAPOFFSET,
>> +};
>> +
>> +static int ci_hdrc_nspire_probe(struct platform_device *pdev)
>> +{
>> +	struct platform_device *ci_pdev;
>> +
>> +	dev_dbg(&pdev->dev, "ci_hdrc_nspire_probe\n");
>> +
>> +	ci_pdev = ci_hdrc_add_device(&pdev->dev,
>> +				pdev->resource, pdev->num_resources,
>> +				&ci_hdrc_nspire_platdata);
>> +
>> +	if (IS_ERR(ci_pdev)) {
>> +		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
>> +		return PTR_ERR(ci_pdev);
>> +	}
>> +
>> +	platform_set_drvdata(pdev, ci_pdev);
>> +
>> +	return 0;
>> +}
>> +
>> +static int ci_hdrc_nspire_remove(struct platform_device *pdev)
>> +{
>> +	struct platform_device *ci_pdev = platform_get_drvdata(pdev);
>> +
>> +	ci_hdrc_remove_device(ci_pdev);
>> +
>> +	return 0;
>> +}
>> +
>> +static const struct of_device_id ci_hdrc_nspire_dt_ids[] = {
>> +	{ .compatible = "zevio,nspire-usb", },
>> +	{ /* sentinel */ }
>> +};
>> +
>> +static struct platform_driver ci_hdrc_nspire_driver = {
>> +	.probe = ci_hdrc_nspire_probe,
>> +	.remove = ci_hdrc_nspire_remove,
>> +	.driver = {
>> +		.name = "nspire_usb",
>> +		.owner = THIS_MODULE,
>> +		.of_match_table = ci_hdrc_nspire_dt_ids,
>> +	},
>> +};
>> +
>> +MODULE_DEVICE_TABLE(of, ci_hdrc_nspire_dt_ids);
>> +module_platform_driver(ci_hdrc_nspire_driver);
>> +
>> +MODULE_LICENSE("GPL v2");
>> --
> 
> You can decide to add module alias or not.

It wasn't really required.

> 
> Acked-by: Peter Chen <peter.chen at freescale.com>
> for driver part.
> 
> I haven't seen your dts patch.

If you mean the dts files for the platform, I'm still working on getting the regulator working so I'll probably send it in when it's all done.

> 
> Peter
> 
> 

Cheers,
Daniel Tang