Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 655d32e9 authored by Peter Chen's avatar Peter Chen Committed by Greg Kroah-Hartman
Browse files

usb: chipidea: add identification registers access APIs 



Using hw_write_id_reg and hw_read_id_reg to write and read identification
registers contents, they can be used to get controller information, change
some system configurations, and so on.

Reviewed-by: default avatarStefan Agner <stefan@agner.ch>
Signed-off-by: default avatarPeter Chen <peter.chen@freescale.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8721a752

drivers/usb/chipidea/ci.h

+39 −0
Original line number Diff line number Diff line
@@ -29,6 +29,15 @@ 
/******************************************************************************

 * REGISTERS

 *****************************************************************************/

/* Identification Registers */

#define ID_ID				0x0

#define ID_HWGENERAL			0x4

#define ID_HWHOST			0x8

#define ID_HWDEVICE			0xc

#define ID_HWTXBUF			0x10

#define ID_HWRXBUF			0x14

#define ID_SBUSCFG			0x90



/* register indices */

enum ci_hw_regs {

	CAP_CAPLENGTH,
@@ -253,6 +262,36 @@ static inline void ci_role_stop(struct ci_hdrc *ci) 
	ci->roles[role]->stop(ci);

}



/**

 * hw_read_id_reg: reads from a identification register

 * @ci: the controller

 * @offset: offset from the beginning of identification registers region

 * @mask: bitfield mask

 *

 * This function returns register contents

 */

static inline u32 hw_read_id_reg(struct ci_hdrc *ci, u32 offset, u32 mask)

{

	return ioread32(ci->hw_bank.abs + offset) & mask;

}



/**

 * hw_write_id_reg: writes to a identification register

 * @ci: the controller

 * @offset: offset from the beginning of identification registers region

 * @mask: bitfield mask

 * @data: new value

 */

static inline void hw_write_id_reg(struct ci_hdrc *ci, u32 offset,

			    u32 mask, u32 data)

{

	if (~mask)

		data = (ioread32(ci->hw_bank.abs + offset) & ~mask)

			| (data & mask);



	iowrite32(data, ci->hw_bank.abs + offset);

}



/**

 * hw_read: reads from a hw register

 * @ci: the controller