diff options
Diffstat (limited to 'arch/x86/include/asm/arch-quark/msg_port.h')
-rw-r--r-- | arch/x86/include/asm/arch-quark/msg_port.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/arch/x86/include/asm/arch-quark/msg_port.h b/arch/x86/include/asm/arch-quark/msg_port.h new file mode 100644 index 0000000..9527fda --- /dev/null +++ b/arch/x86/include/asm/arch-quark/msg_port.h @@ -0,0 +1,136 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + */ + +#ifndef _QUARK_MSG_PORT_H_ +#define _QUARK_MSG_PORT_H_ + +/* + * In the Quark SoC, some chipset commands are accomplished by utilizing + * the internal message network within the host bridge (D0:F0). Accesses + * to this network are accomplished by populating the message control + * register (MCR), Message Control Register eXtension (MCRX) and the + * message data register (MDR). + */ +#define MSG_CTRL_REG 0xd0 /* Message Control Register */ +#define MSG_DATA_REG 0xd4 /* Message Data Register */ +#define MSG_CTRL_EXT_REG 0xd8 /* Message Control Register EXT */ + +/* Normal Read/Write OpCodes */ +#define MSG_OP_READ 0x10 +#define MSG_OP_WRITE 0x11 + +/* Alternative Read/Write OpCodes */ +#define MSG_OP_ALT_READ 0x06 +#define MSG_OP_ALT_WRITE 0x07 + +/* IO Read/Write OpCodes */ +#define MSG_OP_IO_READ 0x02 +#define MSG_OP_IO_WRITE 0x03 + +/* All byte enables */ +#define MSG_BYTE_ENABLE 0xf0 + +#ifndef __ASSEMBLY__ + +/** + * msg_port_setup - set up the message port control register + * + * @op: message bus access opcode + * @port: port number on the message bus + * @reg: register number within a port + */ +void msg_port_setup(int op, int port, int reg); + +/** + * msg_port_read - read a message port register using normal opcode + * + * @port: port number on the message bus + * @reg: register number within a port + * + * @return: message port register value + */ +u32 msg_port_read(u8 port, u32 reg); + +/** + * msg_port_write - write a message port register using normal opcode + * + * @port: port number on the message bus + * @reg: register number within a port + * @value: register value to write + */ +void msg_port_write(u8 port, u32 reg, u32 value); + +/** + * msg_port_alt_read - read a message port register using alternative opcode + * + * @port: port number on the message bus + * @reg: register number within a port + * + * @return: message port register value + */ +u32 msg_port_alt_read(u8 port, u32 reg); + +/** + * msg_port_alt_write - write a message port register using alternative opcode + * + * @port: port number on the message bus + * @reg: register number within a port + * @value: register value to write + */ +void msg_port_alt_write(u8 port, u32 reg, u32 value); + +/** + * msg_port_io_read - read a message port register using I/O opcode + * + * @port: port number on the message bus + * @reg: register number within a port + * + * @return: message port register value + */ +u32 msg_port_io_read(u8 port, u32 reg); + +/** + * msg_port_io_write - write a message port register using I/O opcode + * + * @port: port number on the message bus + * @reg: register number within a port + * @value: register value to write + */ +void msg_port_io_write(u8 port, u32 reg, u32 value); + +/* clrbits, setbits, clrsetbits macros for message port access */ + +#define msg_port_normal_read msg_port_read +#define msg_port_normal_write msg_port_write + +#define msg_port_generic_clrsetbits(type, port, reg, clr, set) \ + msg_port_##type##_write(port, reg, \ + (msg_port_##type##_read(port, reg) \ + & ~(clr)) | (set)) + +#define msg_port_clrbits(port, reg, clr) \ + msg_port_generic_clrsetbits(normal, port, reg, clr, 0) +#define msg_port_setbits(port, reg, set) \ + msg_port_generic_clrsetbits(normal, port, reg, 0, set) +#define msg_port_clrsetbits(port, reg, clr, set) \ + msg_port_generic_clrsetbits(normal, port, reg, clr, set) + +#define msg_port_alt_clrbits(port, reg, clr) \ + msg_port_generic_clrsetbits(alt, port, reg, clr, 0) +#define msg_port_alt_setbits(port, reg, set) \ + msg_port_generic_clrsetbits(alt, port, reg, 0, set) +#define msg_port_alt_clrsetbits(port, reg, clr, set) \ + msg_port_generic_clrsetbits(alt, port, reg, clr, set) + +#define msg_port_io_clrbits(port, reg, clr) \ + msg_port_generic_clrsetbits(io, port, reg, clr, 0) +#define msg_port_io_setbits(port, reg, set) \ + msg_port_generic_clrsetbits(io, port, reg, 0, set) +#define msg_port_io_clrsetbits(port, reg, clr, set) \ + msg_port_generic_clrsetbits(io, port, reg, clr, set) + +#endif /* __ASSEMBLY__ */ + +#endif /* _QUARK_MSG_PORT_H_ */ |