kopia lustrzana https://github.com/cariboulabs/cariboulite
112 wiersze
4.1 KiB
C
112 wiersze
4.1 KiB
C
/**
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* Declarations and definitions for Broadcom's Secondary Memory Interface
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*
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* Written by David Michaeli <cariboulabs.co@gmail.com>
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* Copyright (c) 2021, CaribouLabs.co
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2, as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SMI_STREAM_DEV_H_
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#define _SMI_STREAM_DEV_H_
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#include <linux/ioctl.h>
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#ifndef __KERNEL__
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#include <stdint.h>
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#include <stdbool.h>
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#else
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#define BCM2835_SMI_IMPLEMENTATION
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#include <linux/broadcom/bcm2835_smi.h>
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#endif
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#define DEVICE_NAME "smi-stream-dev"
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#define DRIVER_NAME "smi-stream-dev"
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#define DEVICE_MINOR 0
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typedef enum
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{
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smi_stream_dir_smi_to_device = 0, // device data-bus is highZ (TX)
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smi_stream_dir_device_to_smi = 1, // device data-bus is push-pull (RX)
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} smi_stream_direction_en;
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typedef enum
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{
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smi_stream_channel_0 = 0,
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smi_stream_channel_1 = 1,
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smi_stream_channel_max,
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} smi_stream_channel_en;
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typedef enum
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{
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smi_stream_idle = 0,
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smi_stream_rx_channel_0 = 1,
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smi_stream_rx_channel_1 = 2,
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smi_stream_tx_channel = 3,
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} smi_stream_state_en;
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#ifdef __KERNEL__
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struct bcm2835_smi_instance {
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struct device *dev;
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struct smi_settings settings;
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__iomem void *smi_regs_ptr;
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dma_addr_t smi_regs_busaddr;
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struct dma_chan *dma_chan;
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struct dma_slave_config dma_config;
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struct bcm2835_smi_bounce_info bounce;
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struct scatterlist buffer_sgl;
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struct clk *clk;
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/* Sometimes we are called into in an atomic context (e.g. by
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JFFS2 + MTD) so we can't use a mutex */
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spinlock_t transaction_lock;
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};
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#endif // __KERNEL__
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// Expansion of ioctls
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#define SMI_STREAM_IOC_GET_NATIVE_BUF_SIZE _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+1))
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#define SMI_STREAM_IOC_SET_STREAM_STATUS _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+2))
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#define SMI_STREAM_IOC_SET_STREAM_IN_CHANNEL _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+3))
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#define SMI_STREAM_IOC_SET_FIFO_MULT _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+4))
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#define SMI_STREAM_IOC_SET_ADDR_DIR_OFFSET _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+5))
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#define SMI_STREAM_IOC_SET_ADDR_CH_OFFSET _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+6))
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#define SMI_STREAM_IOC_GET_FIFO_MULT _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+7))
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#define SMI_STREAM_IOC_GET_ADDR_DIR_OFFSET _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+8))
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#define SMI_STREAM_IOC_GET_ADDR_CH_OFFSET _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+9))
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#define SMI_STREAM_IOC_FLUSH_FIFO _IO(BCM2835_SMI_IOC_MAGIC,(BCM2835_SMI_IOC_MAX+10))
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#endif /* _SMI_STREAM_DEV_H_ */
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