diff options
Diffstat (limited to 'src/cpu/allwinner/a10/twi.h')
| -rw-r--r-- | src/cpu/allwinner/a10/twi.h | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/src/cpu/allwinner/a10/twi.h b/src/cpu/allwinner/a10/twi.h deleted file mode 100644 index 833b1dc101..0000000000 --- a/src/cpu/allwinner/a10/twi.h +++ /dev/null @@ -1,69 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * Definitions Two Wire Interface (TWI) (I2C) Allwinner CPUs - */ - -#ifndef CPU_ALLWINNER_A10_TWI_H -#define CPU_ALLWINNER_A10_TWI_H - -#include <types.h> - -/* TWI_CTL values */ -#define TWI_CTL_INT_EN (1 << 7) -#define TWI_CTL_BUS_EN (1 << 6) -#define TWI_CTL_M_START (1 << 5) -#define TWI_CTL_M_STOP (1 << 4) -#define TWI_CTL_INT_FLAG (1 << 3) -#define TWI_CTL_A_ACK (1 << 2) - -/* TWI_STAT values */ -enum twi_status { - TWI_STAT_BUS_ERROR = 0x00, /**< Bus error */ - TWI_STAT_TX_START = 0x08, /**< START sent */ - TWI_STAT_TX_RSTART = 0x10, /**< Repeated START sent */ - TWI_STAT_TX_AW_ACK = 0x18, /**< Sent address+read, ACK */ - TWI_STAT_TX_AW_NAK = 0x20, /**< Sent address+read, NAK */ - TWI_STAT_TXD_ACK = 0x28, /**< Sent data, got ACK */ - TWI_STAT_TXD_NAK = 0x30, /**< Sent data, no ACK */ - TWI_STAT_LOST_ARB = 0x38, /**< Lost arbitration */ - TWI_STAT_TX_AR_ACK = 0x40, /**< Sent address+write, ACK */ - TWI_STAT_TX_AR_NAK = 0x48, /**< Sent address+write, NAK */ - TWI_STAT_RXD_ACK = 0x50, /**< Got data, sent ACK */ - TWI_STAT_RXD_NAK = 0x58, /**< Got data, no ACK */ - TWI_STAT_IDLE = 0xf8, /**< Bus idle*/ -}; - -/* TWI_CLK values */ -#define TWI_CLK_M_MASK (0xf << 3) -#define TWI_CLK_M(m) (((m - 1) << 3) & TWI_CLK_M_MASK) -#define TWI_CLK_N_MASK (0x7 << 0) -#define TWI_CLK_N(n) ((n) & TWI_CLK_N_MASK) - -struct a1x_twi { - u32 addr; /**< 0x00: Slave address */ - u32 xaddr; /**< 0x04: Extended slave address */ - u32 data; /**< 0x08: Data byte */ - u32 ctl; /**< 0x0C: Control register */ - u32 stat; /**< 0x10: Status register */ - u32 clk; /**< 0x14: Clock control register */ - u32 reset; /**< 0x18: Software reset */ - u32 efr; /**< 0x1C: Enhanced Feature register */ - u32 lcr; /**< 0x20: Line control register */ -}; - -void a1x_twi_init(u8 bus, u32 speed_hz); - -#endif /* CPU_ALLWINNER_A10_TWI_H */ |