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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4e17e1db96
C2port implements a two wire serial communication protocol (bit banging) designed to enable in-system programming, debugging, and boundary-scan testing on low pin-count Silicon Labs devices. Currently this code supports only flash programming through sysfs interface but extensions shoud be easy to add. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Silicon Labs C2 port Linux support
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*
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* Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it>
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* Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it>
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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 version 2 as published by
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* the Free Software Foundation
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*/
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#include <linux/device.h>
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#define C2PORT_NAME_LEN 32
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/*
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* C2 port basic structs
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*/
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/* Main struct */
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struct c2port_ops;
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struct c2port_device {
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unsigned int access:1;
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unsigned int flash_access:1;
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int id;
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char name[C2PORT_NAME_LEN];
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struct c2port_ops *ops;
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struct mutex mutex; /* prevent races during read/write */
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struct device *dev;
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void *private_data;
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};
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/* Basic operations */
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struct c2port_ops {
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/* Flash layout */
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unsigned short block_size; /* flash block size in bytes */
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unsigned short blocks_num; /* flash blocks number */
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/* Enable or disable the access to C2 port */
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void (*access)(struct c2port_device *dev, int status);
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/* Set C2D data line as input/output */
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void (*c2d_dir)(struct c2port_device *dev, int dir);
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/* Read/write C2D data line */
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int (*c2d_get)(struct c2port_device *dev);
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void (*c2d_set)(struct c2port_device *dev, int status);
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/* Write C2CK clock line */
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void (*c2ck_set)(struct c2port_device *dev, int status);
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};
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/*
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* Exported functions
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*/
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#define to_class_dev(obj) container_of((obj), struct class_device, kobj)
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#define to_c2port_device(obj) container_of((obj), struct c2port_device, class)
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extern struct c2port_device *c2port_device_register(char *name,
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struct c2port_ops *ops, void *devdata);
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extern void c2port_device_unregister(struct c2port_device *dev);
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