linux-kernel - Re: [PATCH v4 04/46] staging: emxx_udc: add ep capabilities support

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Date:	Thu, 30 Jul 2015 09:15:38 +0200
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	balbi@...com
Cc:	gregkh@...uxfoundation.org, Peter.Chen@...escale.com,
	johnyoun@...opsys.com, dahlmann.thomas@...or.de,
	nicolas.ferre@...el.com, cernekee@...il.com, leoli@...escale.com,
	daniel@...que.org, haojian.zhuang@...il.com,
	robert.jarzmik@...e.fr, michal.simek@...inx.com,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-geode@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, andrzej.p@...sung.com,
	m.szyprowski@...sung.com, stern@...land.harvard.edu,
	petr.cvek@....cz
Subject: Re: [PATCH v4 04/46] staging: emxx_udc: add ep capabilities support

On 07/29/2015 05:20 PM, Felipe Balbi wrote:
> On Mon, Jul 27, 2015 at 11:16:14AM +0200, Robert Baldyga wrote:
>> Convert endpoint configuration to new capabilities model.
>>
>> Fixed typo in "epc-nulk" to "epc-bulk".
>>
>> Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
>> ---
>>  drivers/staging/emxx_udc/emxx_udc.c | 60 ++++++++++++++++++-------------------
>>  1 file changed, 29 insertions(+), 31 deletions(-)
>>
>> diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
>> index 3b7aa36..0d64bee 100644
>> --- a/drivers/staging/emxx_udc/emxx_udc.c
>> +++ b/drivers/staging/emxx_udc/emxx_udc.c
>> @@ -3153,36 +3153,33 @@ static const struct usb_gadget_ops nbu2ss_gadget_ops = {
>>  	.ioctl			= nbu2ss_gad_ioctl,
>>  };
>>  
>> -static const char g_ep0_name[] = "ep0";
>> -static const char g_ep1_name[] = "ep1-bulk";
>> -static const char g_ep2_name[] = "ep2-bulk";
>> -static const char g_ep3_name[] = "ep3in-int";
>> -static const char g_ep4_name[] = "ep4-iso";
>> -static const char g_ep5_name[] = "ep5-iso";
>> -static const char g_ep6_name[] = "ep6-bulk";
>> -static const char g_ep7_name[] = "ep7-bulk";
>> -static const char g_ep8_name[] = "ep8in-int";
>> -static const char g_ep9_name[] = "ep9-iso";
>> -static const char g_epa_name[] = "epa-iso";
>> -static const char g_epb_name[] = "epb-bulk";
>> -static const char g_epc_name[] = "epc-nulk";
>> -static const char g_epd_name[] = "epdin-int";
>> -
>> -static const char *gp_ep_name[NUM_ENDPOINTS] = {
>> -	g_ep0_name,
>> -	g_ep1_name,
>> -	g_ep2_name,
>> -	g_ep3_name,
>> -	g_ep4_name,
>> -	g_ep5_name,
>> -	g_ep6_name,
>> -	g_ep7_name,
>> -	g_ep8_name,
>> -	g_ep9_name,
>> -	g_epa_name,
>> -	g_epb_name,
>> -	g_epc_name,
>> -	g_epd_name,
>> +static const struct {
>> +	const char *name;
>> +	const struct usb_ep_caps caps;
>> +} ep_info[NUM_ENDPOINTS] = {
>> +#define EP_INFO(_name, _type, _dir) \
>> +	{ \
>> +		.name = _name, \
>> +		.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ ## _type, \
>> +				USB_EP_CAPS_DIR_ ## _dir), \
>> +	}
>> +
>> +	EP_INFO("ep0",		CONTROL, ALL),
>> +	EP_INFO("ep1-bulk",	BULK,	ALL),
>> +	EP_INFO("ep2-bulk",	BULK,	ALL),
>> +	EP_INFO("ep3in-int",	INT,	IN),
>> +	EP_INFO("ep4-iso",	INT,	ALL),
>> +	EP_INFO("ep5-iso",	ISO,	ALL),
>> +	EP_INFO("ep6-bulk",	ISO,	ALL),
>> +	EP_INFO("ep7-bulk",	BULK,	ALL),
>> +	EP_INFO("ep8in-int",	INT,	IN),
>> +	EP_INFO("ep9-iso",	ISO,	ALL),
>> +	EP_INFO("epa-iso",	ISO,	ALL),
>> +	EP_INFO("epb-bulk",	BULK,	ALL),
>> +	EP_INFO("epc-bulk",	BULK,	ALL),
>> +	EP_INFO("epdin-int",	INT,	IN),
> 
> IMO, this is pointless obfuscation. It just makes it a pain to grep
> source around. Why don't you have UDC drivers initialize the 1-bit flags
> directly ?
> 

Do you mean something like this? It just makes it a pain to scroll this
source ;)

static const struct {
	const char *name;
	const struct usb_ep_caps caps;
} ep_info[NUM_ENDPOINTS] = {
	{
		.name = "ep0",
		.caps = {
			.type_control = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep1-bulk",
		.caps = {
			.type_bulk = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep2-bulk",
		.caps = {
			.type_bulk = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep3in-int",
		.caps = {
			.type_int = true,
			.dir_in = true,
		},
	},
	{
		.name = "ep4-iso",
		.caps = {
			.type_iso = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep5-iso",
		.caps = {
			.type_iso = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep6-bulk",
		.caps = {
			.type_bulk = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep7-bulk",
		.caps = {
			.type_bulk = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "ep8in-int",
		.caps = {
			.type_int = true,
			.dir_in = true,
		},
	},
	{
		.name = "ep9-iso",
		.caps = {
			.type_iso = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "epa-iso",
		.caps = {
			.type_iso = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "epb-bulk",
		.caps = {
			.type_bulk = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = "epc-bulk",
		.caps = {
			.type_bulk = true,
			.dir_in = true,
			.dir_out = true,
		},
	},
	{
		.name = epdin-int,
		.caps = {
			.type_int = true,
			.dir_in = true,
		},
	},
};

Thanks,
Robert
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