From 655d32e9b2b2b912ff86de656eb620627b0df117 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Wed, 11 Feb 2015 12:44:54 +0800 Subject: [PATCH] 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: Stefan Agner Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/ci.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index a0aeb8df9280..e53287aff916 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -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 -- 2.20.1