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