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/*
* Broadcom Serial Controller (BSC)
*
* Copyright (c) 2024 Rayhan Faizel <rayhan.faizel@gmail.com>
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw/sysbus.h"
#include "hw/i2c/i2c.h"
#include "qom/object.h"
#define TYPE_BCM2835_I2C "bcm2835-i2c"
OBJECT_DECLARE_SIMPLE_TYPE(BCM2835I2CState, BCM2835_I2C)
#define BCM2835_I2C_C 0x0 /* Control */
#define BCM2835_I2C_S 0x4 /* Status */
#define BCM2835_I2C_DLEN 0x8 /* Data Length */
#define BCM2835_I2C_A 0xc /* Slave Address */
#define BCM2835_I2C_FIFO 0x10 /* FIFO */
#define BCM2835_I2C_DIV 0x14 /* Clock Divider */
#define BCM2835_I2C_DEL 0x18 /* Data Delay */
#define BCM2835_I2C_CLKT 0x20 /* Clock Stretch Timeout */
#define BCM2835_I2C_C_I2CEN BIT(15) /* I2C enable */
#define BCM2835_I2C_C_INTR BIT(10) /* Interrupt on RXR */
#define BCM2835_I2C_C_INTT BIT(9) /* Interrupt on TXW */
#define BCM2835_I2C_C_INTD BIT(8) /* Interrupt on DONE */
#define BCM2835_I2C_C_ST BIT(7) /* Start transfer */
#define BCM2835_I2C_C_CLEAR (BIT(5) | BIT(4)) /* Clear FIFO */
#define BCM2835_I2C_C_READ BIT(0) /* I2C read mode */
#define BCM2835_I2C_S_CLKT BIT(9) /* Clock stretch timeout */
#define BCM2835_I2C_S_ERR BIT(8) /* Slave error */
#define BCM2835_I2C_S_RXF BIT(7) /* RX FIFO full */
#define BCM2835_I2C_S_TXE BIT(6) /* TX FIFO empty */
#define BCM2835_I2C_S_RXD BIT(5) /* RX bytes available */
#define BCM2835_I2C_S_TXD BIT(4) /* TX space available */
#define BCM2835_I2C_S_RXR BIT(3) /* RX FIFO needs reading */
#define BCM2835_I2C_S_TXW BIT(2) /* TX FIFO needs writing */
#define BCM2835_I2C_S_DONE BIT(1) /* I2C Transfer complete */
#define BCM2835_I2C_S_TA BIT(0) /* I2C Transfer active */
struct BCM2835I2CState {
/* <private> */
SysBusDevice parent_obj;
/* <public> */
MemoryRegion iomem;
I2CBus *bus;
qemu_irq irq;
uint32_t c;
uint32_t s;
uint32_t dlen;
uint32_t a;
uint32_t div;
uint32_t del;
uint32_t clkt;
uint32_t last_dlen;
};
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