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USB: ci13xxx_udc: handle controllers with less than 16 EPs

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The ci13xxx_udc driver checks the number of endpoints in the udc
controller, however some routines expect that the hardware has 16
bidirectional endpoints.

This patch improves the driver to work on controllers with less than
16 endpoints like the udc controller found on freescale's
mx23 and mx28.

Tested-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Marc Kleine-Budde 2011-10-10 18:38:10 +02:00 committed by Felipe Balbi
parent 7bb4fdc602
commit dd39c358df
2 changed files with 15 additions and 3 deletions
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16
drivers/usb/gadget/ci13xxx_udc.c
View File

@ -182,6 +182,16 @@ static inline int hw_ep_bit(int num, int dir)
return num + (dir ? 16 : 0);
}
static int ep_to_bit(int n)
{
int fill = 16 - hw_ep_max / 2;
if (n >= hw_ep_max / 2)
n += fill;
return n;
}
/**
* hw_aread: reads from register bitfield
* @addr: address relative to bus map
@ -440,12 +450,13 @@ static int hw_ep_get_halt(int num, int dir)
/**
* hw_test_and_clear_setup_status: test & clear setup status (execute without
* interruption)
* @n: bit number (endpoint)
* @n: endpoint number
*
* This function returns setup status
*/
static int hw_test_and_clear_setup_status(int n)
{
n = ep_to_bit(n);
return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
}
@ -641,12 +652,13 @@ static int hw_register_write(u16 addr, u32 data)
/**
* hw_test_and_clear_complete: test & clear complete status (execute without
* interruption)
* @n: bit number (endpoint)
* @n: endpoint number
*
* This function returns complete status
*/
static int hw_test_and_clear_complete(int n)
{
n = ep_to_bit(n);
return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
}

2
drivers/usb/gadget/ci13xxx_udc.h
View File

@ -127,7 +127,7 @@ struct ci13xxx {
struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
u32 ep0_dir; /* ep0 direction */
#define ep0out ci13xxx_ep[0]
#define ep0in ci13xxx_ep[16]
#define ep0in ci13xxx_ep[hw_ep_max / 2]
u8 remote_wakeup; /* Is remote wakeup feature
enabled by the host? */
u8 suspended; /* suspended by the host */