diff options
| author | Jean-Christophe Dubois <jcd@tribudubois.net> | 2015-09-07 10:39:30 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-09-07 10:39:30 +0100 |
| commit | 20d0f9cf6a41bad52baba3ebc485849617cc42cf (patch) | |
| tree | 8b2d592ebc7b00289159b144352bd28ed2a0abe2 /include | |
| parent | f044ac4980922e23b608afc2f35648ebadb42950 (diff) | |
| download | qemu-20d0f9cf6a41bad52baba3ebc485849617cc42cf.zip | |
i.MX: Add I2C controller emulator
The slave mode is not implemented.
Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 508dbf2ebe26ec383d3a12a1db5a7890ac8acf20.1441057361.git.jcd@tribudubois.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/i2c/imx_i2c.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/include/hw/i2c/imx_i2c.h b/include/hw/i2c/imx_i2c.h new file mode 100644 index 0000000000..e2ee8eaee8 --- /dev/null +++ b/include/hw/i2c/imx_i2c.h @@ -0,0 +1,87 @@ +/* + * i.MX I2C Bus Serial Interface registers definition + * + * Copyright (C) 2013 Jean-Christophe Dubois. <jcd@tribudubois.net> + * + * 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; either 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#ifndef __IMX_I2C_H_ +#define __IMX_I2C_H_ + +#include <hw/sysbus.h> + +#define TYPE_IMX_I2C "imx.i2c" +#define IMX_I2C(obj) OBJECT_CHECK(IMXI2CState, (obj), TYPE_IMX_I2C) + +#define IMX_I2C_MEM_SIZE 0x14 + +/* i.MX I2C memory map */ +#define IADR_ADDR 0x00 /* address register */ +#define IFDR_ADDR 0x04 /* frequency divider register */ +#define I2CR_ADDR 0x08 /* control register */ +#define I2SR_ADDR 0x0c /* status register */ +#define I2DR_ADDR 0x10 /* data register */ + +#define IADR_MASK 0xFE +#define IADR_RESET 0 + +#define IFDR_MASK 0x3F +#define IFDR_RESET 0 + +#define I2CR_IEN (1 << 7) +#define I2CR_IIEN (1 << 6) +#define I2CR_MSTA (1 << 5) +#define I2CR_MTX (1 << 4) +#define I2CR_TXAK (1 << 3) +#define I2CR_RSTA (1 << 2) +#define I2CR_MASK 0xFC +#define I2CR_RESET 0 + +#define I2SR_ICF (1 << 7) +#define I2SR_IAAF (1 << 6) +#define I2SR_IBB (1 << 5) +#define I2SR_IAL (1 << 4) +#define I2SR_SRW (1 << 2) +#define I2SR_IIF (1 << 1) +#define I2SR_RXAK (1 << 0) +#define I2SR_MASK 0xE9 +#define I2SR_RESET 0x81 + +#define I2DR_MASK 0xFF +#define I2DR_RESET 0 + +#define ADDR_RESET 0xFF00 + +typedef struct IMXI2CState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion iomem; + I2CBus *bus; + qemu_irq irq; + + uint16_t address; + + uint16_t iadr; + uint16_t ifdr; + uint16_t i2cr; + uint16_t i2sr; + uint16_t i2dr_read; + uint16_t i2dr_write; +} IMXI2CState; + +#endif /* __IMX_I2C_H_ */ |