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usb: ulpi: add indicator configuration function

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Allows for easy configuration of the VBUS indicator related ULPI
config bits.

Also move the external indicator setup from ulpi_set_vbus() to
the new function.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
This commit is contained in:
Lucas Stach 2012-10-01 00:44:34 +02:00 committed by Tom Rini
parent 7a46b2c7f2
commit 141288b3a3
2 changed files with 39 additions and 6 deletions
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32
drivers/usb/ulpi/ulpi.c
View File

@ -106,20 +106,44 @@ int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed)
return ulpi_write(ulpi_vp, &ulpi->function_ctrl, val);
}
int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power,
int ext_ind)
int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power)
{
u32 flags = ULPI_OTG_DRVVBUS;
u8 *reg = on ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear;
if (ext_power)
flags |= ULPI_OTG_DRVVBUS_EXT;
if (ext_ind)
flags |= ULPI_OTG_EXTVBUSIND;
return ulpi_write(ulpi_vp, reg, flags);
}
int ulpi_set_vbus_indicator(struct ulpi_viewport *ulpi_vp, int external,
int passthu, int complement)
{
u32 flags, val;
u8 *reg;
reg = external ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear;
val = ulpi_write(ulpi_vp, reg, ULPI_OTG_EXTVBUSIND);
if (val)
return val;
flags = passthu ? ULPI_IFACE_PASSTHRU : 0;
flags |= complement ? ULPI_IFACE_EXTVBUS_COMPLEMENT : 0;
val = ulpi_read(ulpi_vp, &ulpi->iface_ctrl);
if (val == ULPI_ERROR)
return val;
val = val & ~(ULPI_IFACE_PASSTHRU & ULPI_IFACE_EXTVBUS_COMPLEMENT);
val |= flags;
val = ulpi_write(ulpi_vp, &ulpi->iface_ctrl, val);
if (val)
return val;
return 0;
}
int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable)
{
u32 val = ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN;

13
include/usb/ulpi.h
View File

@ -61,8 +61,17 @@ int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed);
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp,
int on, int ext_power, int ext_ind);
int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power);
/*
* Configure VBUS indicator
* @external - external VBUS over-current indicator is used
* @passthru - disables ANDing of internal VBUS comparator
* with external VBUS input
* @complement - inverts the external VBUS input
*/
int ulpi_set_vbus_indicator(struct ulpi_viewport *ulpi_vp, int external,
int passthru, int complement);
/*
* Enable/disable pull-down resistors on D+ and D- USB lines.