9be8a82c0e
This patch implements Allwinner TWI/I2C controller emulation. Only master-mode functionality is implemented. The SPL boot for Cubieboard expects AXP209 PMIC on TWI0/I2C0 bus, so this is first part enabling the TWI/I2C bus operation. Since both Allwinner A10 and H3 use the same module, it is added for both boards. Docs are also updated for Cubieboard and Orangepi-PC board to indicate I2C availability. Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com> Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com> Message-id: 20221226220303.14420-4-strahinja.p.jankovic@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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* Allwinner I2C Bus Serial Interface registers definition
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*
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* Copyright (C) 2022 Strahinja Jankovic. <strahinja.p.jankovic@gmail.com>
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*
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* This file is derived from IMX I2C controller,
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* by Jean-Christophe DUBOIS .
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef ALLWINNER_I2C_H
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#define ALLWINNER_I2C_H
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#include "hw/sysbus.h"
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#include "qom/object.h"
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#define TYPE_AW_I2C "allwinner.i2c"
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OBJECT_DECLARE_SIMPLE_TYPE(AWI2CState, AW_I2C)
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#define AW_I2C_MEM_SIZE 0x24
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struct AWI2CState {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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MemoryRegion iomem;
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I2CBus *bus;
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qemu_irq irq;
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uint8_t addr;
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uint8_t xaddr;
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uint8_t data;
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uint8_t cntr;
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uint8_t stat;
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uint8_t ccr;
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uint8_t srst;
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uint8_t efr;
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uint8_t lcr;
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};
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#endif /* ALLWINNER_I2C_H */
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